4.Long-term changes in tree-ring–climate relationships
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树木减少的原因英语作文英文回答:Deforestation, the large-scale removal of trees, is a major environmental issue that has been ongoing for centuries. Over the years, as the human population has grown and spread, the demand for land, resources, and products has increased, leading to the clearing of vast tracts of forests.1. Agriculture: One of the primary reasons for deforestation is the conversion of land for agricultural purposes. As the demand for food increases, farmers clear forests to create more space for growing crops and raising livestock. This conversion often involves the burning of trees, which releases carbon dioxide into the atmosphere and contributes to climate change.2. Logging: The logging industry is another major contributor to deforestation. Trees are harvested for theirwood, which is used in a variety of products, including furniture, paper, and building materials. Unsustainable logging practices, where trees are felled without proper reforestation, can lead to the depletion of forestresources and the degradation of ecosystems.3. Urbanization: The expansion of urban areas is also a significant factor in deforestation. As cities grow,forests are cleared to make way for housing, infrastructure, and other developments. Urbanization can also lead to the fragmentation of forests, which can disrupt ecological processes and reduce biodiversity.4. Mining: Mining activities often involve the clearing of forests to access mineral deposits. The extraction and processing of minerals can also result in the pollution of soil and water, further damaging ecosystems.5. Natural Disasters: Natural disasters such as wildfires, hurricanes, and landslides can also contributeto deforestation. These events can cause widespread destruction of forests, leading to the loss of habitat,carbon storage, and other ecosystem services.中文回答:树木减少的原因:1. 农业,为了种植农作物和饲养牲畜,农民们砍伐森林来获得更多的土地。
备战2023高考英语语法填空专项分类训练专题06 语法填空之非谓语动词的现在分词100题1.(2022年全新高考I卷)The Chinese government recently finalized a plan to set up a Giant Panda National Park(GPNP). ________ (cover)an area about three times the size of Yellowstone National Park, the GPNP will be one of the first national parks in the country.2.(2022年全国甲卷)Now, Cao has started the second part of his dream to walk along the Belt and Road route. He flew 4, 700 kilometers from Xi’an to Kashgar on Sept. 20, ________ (plan) to hike back to Xi’an in five months.3.(2021年北京卷)From 2000 to 2019, there were 7, 348 major natural disasters around the world,________(result) in USD 2,970 billion in economic loss.4.(2022年全国乙卷)________(strengthen)the connection with young people, the event included a number of public promotional activities on social media, ________(invite)twenty-nine tea professionals from around the world to have thirty-six hours of uninterrupted live broadcasts.5.(2022全国甲卷)He flew 4, 700 kilometers from Xi’an to Kashgar on Sept. 20, __________ (plan) to hike back to Xi’an in five months.6.(2022新高考I卷)__________ (cover)an area about three times the size of Yellowstone National Park, the GPNP will be one of the first national parks in the country.7.(2022年浙江卷1月)But Cobb and others ________ (be) now questioning that idea pushing conferences to provide more chances to participate remotely, and ________ (change) their personal behavior to do their part in dealing with the climate change crisis.8.(2022·宁夏石嘴山·一模)Chen Wenqiaochu set an example when he was 14. He performed CPR (心肺复苏术) on a cleaner at his school,________(save) the man’s life in 2013. (用适当的词填空)9.(2022·山东·模拟预测)________ (aim) to recall tradition, the design team applied the patterns, colors, and techniques of Yi’s culture to their contemporary fashion design, including T-shirts, jackets, shirts and other essentials.10.(2022·湖南·二模)In this city, there is the Pu’er Monument to the National Unity Oath, known as “the No.1 Monument of New China for National Unity”, Menglian Xuanfusi Department ________ (reflect) the history and culture of the Dai nationality, and a batch of national dances and songs enjoying great popularity including “Troth Plighting” and “Awa People Sing New Songs”.11.(2022·广东梅州·二模)The eye-catching colors and styles created a visual feast that many have never seen before, quickly ________(turn) the collections into best sellers.12.(2022·陕西·宝鸡市渭滨区教研室模拟预测)You are in the car on the way to work. You’re a little nervous, ________ (fear ) that you might be late.13.(2022·黑龙江齐齐哈尔·二模)Suddenly it seems to them that Nina has become an extremely unhappy teenager who lacks direction rather than an adult living her own life. ________ (see) their aimless daughter every day, they are very disappointed.14.The hydrothermal vents form in volcanic ally active areas, _________ (pour) mineral-rich fluids into the sea. 15.The local government has taken some effective measures, ________(aim) at cutting down the cost during the tough economy.16.A good listener takes part in the conversation, ________(offer) ideas and raising questions to keep the talk flowing.17.________ (wait) in the queue for half an hour, the old man suddenly realized he had left the cheque in the car.18.I saw him __________ under the big tree.(dance)19.Sarah pretended to be cheerful, ________(say) nothing about the argument.20.—How did you manage to escape from the big fire last Wednesday?—The couple ________ (live) next door woke me up and we called the firefighters.21.—I haven’t seen Jack these days.—Er, I saw him ________(play) basketball on the playground this morning.22.To achieve this condition, I keep __________ myself: Be sure to study hard. (tell)23.Look over there—there’s a very long, winding path ________(lead)up to the house.24.They kept their employees __________(work) for five hours without a rest.25.The lecture, ________(start) at 7:00 pm last night, was followed by an observation of the moon with telescopes.26.All the audience are watching him __________(perform) on the stage with full attention.27.It’s hard to go up a hill __________ a big bag of rice. (carry)28.Not __________ her telephone number, I wrote a letter to her.(know)29.He laughed, ________ (reveal) a line white teeth.30.Once when I was facing a decision that involved high risk, I went to a friend. He then wrote a sentence________ (contain) the best advice I’ve ever had: “Be bold and brave”.31.He has done a lot of jobs, ________ (range) from doctor to lawyer.32.Don’t leave her ________ (wait) outside in the rain.34.She sat in the chair, ________ (hug) her knees.35.________ (catch) the 7:30 train from Paddington, I got to the office earlier that day.36.The beach is just 30 meters away from the hotel. You can even hear the waves ________ (crash) on the beach at night.37.They have been sitting ________ (watch) television.38.There is a lot of evidence ________ (confirm) the US was funding military-biological projects in Ukraine (乌克兰).39.Consequently,she succeeded in making a kind of candy only________(use) natural sweeteners, which can reduce oral bacteria.40.—Mr Johnson, I’m really sorry to have kept you ________(wait) for a long time.—I know you are very busy at the moment.41.________(cover ) an area of over 4,000 square kilometers, Qinghai Lake is also the the biggest salt water lake in China.42.________( know) all this,l still want to see it in person.43.When the little girl found so many people ________(surround) her,she felt very nervous.44.On the last day of our week-long stay, we were invited to attend a private concert on a beautiful farm on the North Shore under the stars, ________( listen) to musicians and meeting interesting locals.45.________( face ) tough challenges,the Chinese women's volleyball team won the Olympic gold medal in Rio. 46.Listen! The song________ (sing) is very popular with the students.47.As I was about to give up hope , a man________(drive) an old car came to help me.48.The singer held his head and walked past, ______________(ignore) his fans.49.An accident happened at the corner of the street, ________(claim) 3 lives and 5 injured.50.The boy fell, ________ (strike) his head on the edge of the table.51.Are there any matters __________ (arise) from the minutes of the last meeting?52.There’s a virus ___________(go) around the office.53.Y ungang Grottoes in Shanxi Province, _________ (date) back to more than 1,500 years ago, are a world cultural heritage site.54.The storm left, ________ (cause) a lot of damage to this area.55.And when he saw the mists rising from the river and the soft clouds________ (surround) the mountain tops, he was reduced to tears.56.I was upset to learn that many sea animals eat plastic garbage, ________ (think) it is food.participate remotely and ________ (change) their personal behavior to do their part in dealing with the climate change crisis.58.The teacher noticed the students ____________ (discuss) questions in groups.59.Finally I refused to attend classes, ________ (shut) myself in my room for hours.60.Now, there are still many problems ________ (remain) to be solved.61.With a lot of policies________(support) small and medium—sized enterprises, they develop very fast. 62.The police arrived within five minutes,__________(settle) the riot immediately.63.With our brave soldiers__________(defend) the country against any possible invasion, all the people can lead a happy and harmonious life.64._________ (admit) killing three passers-by deliberately, he was sentenced to death.65.Out of 37 sets of brothers, Russell and his brother were the only full pair ________ (survive) the attack. 66.(2020·新课标III卷语法填空)And when he saw the mists rising from the river and the soft clouds___ (surround) the mountain tops, he was reduced to tears.67.A pedestrian lane runs more than 4,000 meters through the tropical forest, ________ (ensure) close contact with nature.68.She was initially encouraged by her nephew, who asked Gan to be the main character in his shortvideos________ (feature) country life.69.I have examined all the documents _________(refer) to the matter. (所给词的适当形式填空)70.Many Chinese brands, _______(develop)their reputations over centuries, are facing new challenges from the modern market.71.It's reported that the materials can generate about 5.8 million kilowatt- hours of electricity for the station,________ (save) about 1,800 tonnes of coal.72.His teacher , Thomas Whaley, is next to him,___________(whisper)support.73.When he came into the sitting room, he found his father _____________ (entertain) his guests to some fruit. 74.A 90-year-old has been awarded “Woman Of The Year” for ________ (be) Britain’s oldest full-time employee — still _______ (work) 40 hours a week.75.The solar highway is a 2 km stretch(一段)of road______(lie)on the Jinan City Expressway, and it’s divided into three layers.76.With the new term __________(approach), a lot of students are making preparations for their study.77._________(taste) wonderful, this kind of food enjoyed a good sale.78.As is known to all, Indonesia is an Asian country ______ (consist) of a lot of islands.80.________ (suffer) from heart trouble for year, Professor White must take some medicine with him wherever he goes.81._________ (compare) his latest smart phone, I find my phone is surely out of date.82.A man ___________ others will be respected. (respect)83.With the second ring road overpass _______ (construct)at present in Chengdu, the local citizens have to choose another way to avoid traffic jam.84.This is an old building ________ (date) back to the 14th century.85.We offer them three choices: the end of March, the middle of April and the beginning of May, and they chose the earliest one, which is good actually with exams _________ (come) up in May.86.Alice walked down the hill, ___________ softly to herself. (sing)87.The house__________(build) for the old is to be completed next month.88.There is a note pinned to the door, ________(say) when the shop will open again.89.Newly-built wooden cottages line the street,________(turn)the old town into a dreamland.90.With so many people _________ (focus) their eyes on him, he felt very nervous.91.The girl ________ (perform) on the stage is my classmate.92.If you are trying to lose weight, you’d better have drinks________ (contain)no sugar.93.________ (fail) in the exam twice, his brother couldn't graduate on time.94.India has dealt with some issues ___________ (range) from forest conservation to bus fuel.95.Can you show me any word ______ (begin) with the letter “L”?96.Unfortunately his father died, __________ (leave) the family even worse off.97.Like ancient sailors, birds can find their way__________(use)the sun and the stars.98.He sent an e-mail to his teacher, ________ (convey) his apologies.99.A cook will be immediately fired if he is found___________(smoke) in the kitchen.100.Sport has become an important form of entertainment,_____(appeal) to both men and women.参考答案:1.Covering【解析】考查非谓语动词。
中考英语练习:用所给单词的适当形式填空和句型转换1.I’m considering____________(change) a new job. I will leave my new address in a few days.2.It’s an ____________(education) experience for children to watch this movie.3.There were 12 people ___________(kill) in the accident, ___________(include) two babies.4.The beach is famous, ____________(especial) in summer.5.What a ____________(thrill) game! The winner was in doubt until the last minute.6.The village is far from the big city. It looks very ____________(peace).7.He feels like____________(do) morning exercises every day.8.Would you like____________(drink) some orange juice?9.The girl felt very ____________(tire) and didn’t want to run any longer.10.He said he ____________(be) a scientist some day.11.It’s easy for the young girl ____________(work) out the problem.12.____________(stand) here too long will make you ____________(tire).13.I think you are supposed ________(ask) your parents for help when it is __________(need).14.I would like ____________(travel) to an ____________(excite) place.15.The MP3 costs only 300 yuan. I think it’s ____________(expensive). I can afford it.16.We want to take a trip this summer somewhere in ____________(east) China.17.Our teacher often tells us ____________(not talk) in class.18.Don’t _________(do) it all by________(you) . Let Helen________(help)you ________(do) it.19.Here are the ____________(find)of the survey.20.The book needs ____________(read) again.21.It’s very ____________(excite) to sail down the river.22.It is ____________(report) that 200 people were killed in the accident.23.The classroom was very________(noise) because some students are talking________(noise).24.Could you please____________(not trouble) me and ____________(give) me a hand?25.I would rather____________(not eat) anything that’s been___________(cook) in oil.26.I prefer____________(get) together____________(discuss)this question.27.There are many places of____________(interesting) near the city.28.I hope you and Jim can enjoy____________(you) at the party.29.He always supports charities because he thinks it’s__________(mean) to help people in need.30.Old David lives with his family in a small house____________(quiet).31.We got together to celebrate her grandma’s ____________(ninety) birthday.32.Keep clean please. It is ____________(correct) to litter there.33.The bridge that____________( be) built last year is very strong.34.The books that ____________(be)written by Lu Xun____________(sell) well.35.What’s the ____________(little) expensive way to travel, by train, by bus or by plane?36.Daniel is interested in playing computer games and __ ____(chat) with friends on the Internet.37.So far, this project ____________(help) poor young girls return to school.38.Can you tell me when he____________(interview) the pop stars? In two days.39.We’ll have a ____________(discuss)at two this afternoon.40.The population in China is ____________(increase)very quickly.41.Whose notebook is this? It must be my____________(uncle).42.Wearing ____________(ear) is not good for school girls.43.Try your best and you will ____________(successful).44.—Grandmother fell down, —please call 120 and get the ____________(medicine) help first.45.I would wait for the new student to introduce____________(her) to me.46.Taking exercise can help you____________47.There are many books on these____________(shelf).48.Edison carried the boy to____________(safe).49.He knows much about history. He is a ____________(knowledge) teacher.50.Please turn off the lights before____________(leave) the room.51.He went to school without____________(have) breakfast.52.You can’t believe him, because he is ____________(honest).53.He fell____________(sleep) before he took off his clothes.54.The police caught a man ____________(try) to get into a shop through the window.55.What a good person he is to ____________(get) on with!56.Our teacher________(give) out the test papers this morning. I am sorry I __________(fail).57.He is supposed ________(call) up ten people and ask them__________(come).58.We’re going to ________(set) up a food bank _________(help) the poor. We need_________(come) up with some____________(idea).59.Clean-up Day is in two_______(week) time from now, we can’t put off ______(make) a plan.60.Meimei plans ____________(travel) in the south of ____________(china).61.He____________(spend) and hour ____________(read) every morning.62.Long Zhou wants____________(be) a ____________(profession) ____________(sing).63.Ming says he has ____________(meet) some____________(wonder) people at eh hospital.64.I____________(run) out of my money last week. He____________(lend) me some.65.He also put up some signs_________(ask) for old bikes and ________(ring) up all his friends.66.Why can’t he stop____________(cry)? Because his grandpa died, he is too sad.67.They want to help____________(able) soldiers.68.Mr. Yang has____________(fill) our ____________(life) with ____________(please).69.Lily is a friend of ____________(I), you are one of ____________(I) friends too.70.My sister and I take turns____________(look after) my sick mother.71.The movie is so exciting that the boy can’t stop____________(laugh).72.We __________(ask) not to talk in class.73.He remained __________(stand)though we asked him to sit down.74.Japan is a __________(develop) country and India is a__________ county.75.Potato chips__________(invent) by a man__________(call) George Crum.76.Tree __________(leaf) begin to fall down when autumn falls.77.He did the work as__________(care) as most of us.78.Tea is one of __________(popular) drinks in the world today.79.He added some__________(salt) on the food but it was still not__________.80.What do you think is the __________(annoy) invention?81.Henry Ford was the __________of the car. The car is a very helpful__________(invent).82.The weather is so __________.I can’t stand the __________. (heat)83.The factory __________lots of plastic__________.(produce)84.Lots of __________(drink) water in our village has__________(pollute)85.Qi Baishi was a __________ artist. He __________lots of works of art. (create)86.The medicine should __________ ( take) before meals.87.Great changes have __________(take place) in our city.88.Nick__________(buy) a new camera. He has taken lots of pictures with it.89.Mrs Green used to __________(go) to hospital, but now he is in good health.90.He__________(have) the dictionary for about 20 years, But it is still new.91.It__________(seem) you are right.92.It’s very cold. I think it__________(rain).93.He said that he__________(come) back in five minutes.94.I didn’t meet him. He __________(leave) when I got there.95.He__________(sit) down and began to read his newspaper.96.He is not here. He __________(go) to the post office.97.He is very hungry. He__________(not eat) anything for 4 days.98.I__________(go)with you if I have time.99.We will go to the cinema if it__________(rain) tomorrow.100.I will tell her the news when she __________(come) to see me next week. 101.We __________(be) good friends since we met at school.102.What __________ you __________ (do) at five yesterday afternoon? 103.The bike is nice. How much __________ it __________ (cost)?104.It__________(be) 4 days since he arrived here.105.I asked him if he__________(see) a whale blowing(吹气).106.Jim__________(be ill) for a week when he was sent to the hospital. 107.They said they__________(see) the film.108.The train__________(leave) when I arrived at the station.109.He stood up, __________(take) his coat and__________(go) out.110.When my father got home, it__________ already__________(stop) raining. 111.By the end of last week, I __________(be) to the farm twice.112.He said that he__________(read) the book before.113.Jim said he__________(work) in that factory since 1990.114.Because he__________(lose) his keys, he can’t get into the house.115.When I got to the cinema, the film__________(be) on for 5minutes.116.Since last summer, over 10 people__________(lose) their lives in the accident. 117.When I arrived at the bookstore, all the books__________(sell) out.118.The man __________in 2002. He__________ for 9 years. (die)119.Our teacher told us that Columbus__________(discover) America in 1492. 120.I bought a radio but __________(lose) it.121.Look! She__________(dance) with an old man.122.By the time she woke up, it__________ already__________(stop) raining. 123.When she left the supermarket, she__________(spend) all her money.1. Tom has lunch at school every day. (改为一般疑问句)_________ Tom _________ lunch at school every day?2. That dictionary cost him twenty yuan. (改为一般疑问句)_________ that dictionary _________ him twenty yuan?3. Did you do your homework at school yesterday?(改为陈述句)I _________ _________ homework at school yesterday.4. The foreign visitor comes from Russia.(用Australia完成选择疑问句)_________ the foreign visitor come from Russia _________ _________? (改为反意疑问句) 5. You've never been out of China before.You've never been out of China before, _________ _________? (改为反意疑问句)6. You came here together. (改为反意疑问句)You came here together, _________ _________?7. There're more than ten pandas on the hill. (改为反意疑问句)There're more than ten pandas on the hill, _________ _________?8. Don't look out of the window.Don't look out of the window, _________ _________?9. All of us want him to rest.(改为完全否定句)_________ of us _________ him to rest.10. I think you are right.(改为否定句)I _________ think you _________ right.11. Tom is sitting on the desk.(改为否定祈使句)_________ _________ on the desk, Tom!12. The children are singing and dancing happily. (改为感叹句)_________ _________ the children are singing and dancing!13. The film is very interesting. (改为感叹句)_________ _________ the film is!14.Lisa used to eat candy all the time. (对画线部分提问)________ _______ Lisa use to do all the time?15. I study for a test by listening to the radio. (对划线部分提问)__________ ___________ you ______________ for a test?16. Maybe this pen is Obama’s. (就划线提问)________ ________ this pen be?17. The water was so dirty that we couldn't drink it.(改为简单句)The water was _________ dirty for us _________ drink.18. Does the shop close at six every day? Do you know?(改为复合句)Do you know _________ the shop _________ at six every day?19. Judy said, “I have decorated the house with lots of balloons.”(改为间接引语)Judy said that decorated the house with lots of balloons.20. I really don't know which book I should choose.(改为简单句)I really don't know _________ _________ _________ _________.21. “Does the girl need any help?” he asked me.(改为复合句)He asked me _________ the girl _________ some help.22. I don't know what to do next.(改为复合句)I don't know what _________ _________ next.23. He said, “I read the book before.”(改为间接引语)He told me that he had read the book before.24. The question isn't easy enough for them to answer.(改为复合句)The question is _________ _________ that they _________ _________ it.25. The man is very strong and he can carry the heavy bag. (改为简单句)The man is _________ _________ to carry the heavy bag.26. George has two cabbages. Mary has only one.(改为复合句)George has ________ cabbages ________ Mary.27. We won't have any lessons tomorrow because we'll have the sports meeting.(改为简单句)We won't have any lessons tomorrow ________ _________ the sports meeting.28. If you don't work hard, you won't pass the exam next time.(改为并列句)_________ _________, _________ you will fail the exam next time.29. Hurry up, and you'll catch the early bus.(改为复合句)_________ _________ _________ _________, you'll catch the early bus.30. Jessica would like to rent a house with a kitchen.(改为复合句)Jessica would like to rent a house a kitchen.31. A plane is a kind of machine and the machine can fly.( 同义句转换)A plane can fly.32. She wants to help the children. They are ill in hospital.(合并为复合句)She wants to help the children_________ _________ill in hospital.33.I love those cities. The cities are very enjoyable. (合并为一句)I love those cities __________ ________ enjoyable.34. The man is talking with a student. He gave us a talk last week..(改同义句)The man ______ gave us a talk last week ____ talking with a student .35. I think it my duty to write to you and thank you. (改为复合句)I think it _________ my duty ________ write to you and thank you.36.Did Johnson catch many fish yesterday?. (改为被动语态)You should cover the cut with a clean cloth at once.(改为被动语态)37.The cut should with a clean cloth at once.They will put the donated money to good use.(改为被动语态)38.The donated money will to good use.Animal Helper has trained Lucky to help the disabled.(改为被动语态)39. Lucky has __________ ___________ to help the disabled.40. It used to take me a lot of time to stay outdoors at night in summer when I was young. (改为同义句)I used to ______ a lot of time _____ outdoors at night in summer when I was young.43. Tom would rather take a walk rather than stay at home .(改为同义句)Tom prefferred ____________a walk to ____________home.44. How can the eight-year-old boy save an adult? (改为同义句)How can the boy of eight ____________ old save an adult’s_________45. The scenery is strongly impressed on my mind.I’m very___________ _______ the scenery.46.What can we do with these books ?________ can we ________ with these books?47.Kelly usually keeps the window open when she sleeps.(改为同义句)Kelly usually sleeps the window .48.The poor mother doesn’t have enough money to send her child to school. (改为同义句)The poor mother can’t pay for her child’s education.49. What will you do if your parents don’t allow you to join us?(改为同义句)your parents don’t allow you to join us?50. Social situations don’t bother you at all if you are confident enough. (改为同义句)Social situations don’t bother you if you are confident enough.51. Work hard, or you’ll make me disappointed. (改为同义句)Work hard, or you’ll .52. I would hurry to call the hospital if I saw an accident in the street. (改为同义句)I would call the hospital if I saw an accident inthe street.53. Her money ran out in the bookstore. (同义句)His money was ________ _________ .54. You are from Beijing. I’m from Beijing ,too.(同义句)________ ________ you _________ ________I am from Beijing .55.Our school football team won the prize for the football match yesterday.(同义句)The Price of the football match _______ _______our school football team yesterday.56.You should shake hands when you meet someone in China for the first time. ( 改为同义句) You ___ ___ ___ __hands when you meet someone in China for the first time57.The coat is too expensive for me. (改为同义句)The coat ______ ______ ______ ______ me .58. Who is the owner of the red bicycle?Who ________ the red bicycle __________ ____________? (同义句)59. They have run out of all the paper already. (同义句)They have ________ ________ all the paper already.60.Tina and Peter got married two years ago. (改为同义句)Tina_____ _____ ______Peter two years ago.61. My car broke down yesterday. I can’t go there with you. (改为同义句)There was _____________- with my car yesterday. I can’t go there with you.62. Her parents often provide lots of money for her. (改为同义句)Her parents often ________ _______ _________ lots of money.63.You shouldn’t behave like that at the table.(同义句)You ________ _________ to behave like that at the table.64. How was your visit to France last month?________ was your visit to France ________ last month? (同义句)65. My French has become better. (同义句)My French has ________.66. Lucy has made up her mind that she won’t do that again.(同义句)Lucy has _______ _______ to do that again.67. I'm sure that man is Mr. Green. (同义句)That man ________ ________ Mr. Green.68. It began to rain so they didn't go window-shopping. (同义句)They didn't go window-shopping ________ ________ the rain.根据上句完成下句,使两句话的意思相同或相一致,每空一词1. Nancy is too young to dress herself.Nancy is not _____ _____ to dress herself.2. My watch doesn't work well. There is ____ _____ _______ my watch.3. Jane doesn't go to work by bus any longer.Jane ____ _____ _____ to work by bus.4. It took Mary two weeks to prepare for the exam.Mary _____two weeks____ ______ for the exam.5. It seems that they have known each other. They seem to _____ _____ each other.6. "My grandpa doesn't like coffee or c oke” said BobBob said that _____grandpa liked _____coffee _____coke.7. Cao Fei joined the League three years ago.Cao Fei _____ ____ _____ the League for three years.8. I prefer walking there to going by bus.I prefer to walk there ____ _____ going by bus.9. -Thank you very much. -You're welcome. - ____ a lot. -Not at____ .10. Kitty does well in English. Kitty ____ ____ ____ English.11. They realized Hainan was a beautiful place after they reached there. They____ realize Hainan was a beautiful place_____ they reached there. 12. We will have to finish the work hardly if you don't help us.We can't finish the work _____ _____ ______13. My dictionary isn't so thick as yours. My dictionary is _____ than yours.14. Could you tell me where the East Street Hospital is?Excuse me, ____ is the _____ to the East Street Hospital?15. The book is exciting to read. It is ____ _____ read the book.16. Jack's mother asked him, "Have you packed your things?"Jack's mother asked him ____ he ____ packed his things.17. She likes singing better than dancing. She ____ singing ____ dancing.18. Remember to ring me up as soon as you get to NanjingMake ____ to give me a ring as soon as you _____ Nanjing.19. They couldn't catch the train because of the heavy traffic.The heavy traffic _____ them from _____ the train.20. My brother has been away from home for two days.My brother _____ home two days _____ .21. Li Lei decided to move to Canada when he was thirty.Li Lei made a _____ to move to Canada at the _____ of thirty.22. Jim was too careless to pass the exam last term.Jim was not_____ _____ to pass the exam last term.23. If you don't hurry up, you can't catch the train.Hurry up, _____ you may _____ the train.24. Yang Li wei said to us, "I'm going to visit your school tomorrow. " We were all pleased. We were all pleased when we heard Yang Li wei_____ visit_____ school the next day.25. This is the most interesting film I have ever seen.I have ____seen _____ an interesting film before.26. I was late for school because of the traffic accident.The traffic accident _____ me _____ getting to school on time.27. The books on the bookshelf are not difficult to reach.____ _____ to reach the book on the bookshelf.28. All the pupils have read this storybook. Their English teacher has read this storybook, too. ____ _____ all the pupils _____ _____ their English teacher has read this storybook.29. Mike's car is much more expensive than Susan's.Susan's car is ____ ______ than_____ .30. Lucy sings beautifully, and so does Lily. ____ Lucy ____Lily sing beautifully.31. We didn't take a rest. We went on working.We went on working____ _____ taking a rest.32. Lesson 8 is very difficult. He can't understand it.Lesson 8 is _____difficult for him ______ understand.33.We were surprised that the little girl could draw so well.____ ____ ______ the little girl could draw very well.34. They took the boy to hospital, as soon as they could.The boy_____ _____ to hospital as soon as____35. The girl was very nervous so that she didn't know what she should say at the meeting. The girl was very nervous so that she didn't know what____ _____ at the meeting.II. 改写句子,使其与原句意思相同或相近,每空一词。
深度阅读理解训练核心:句型和词汇的把握。
示例:A combination of climate change-related impacts, such as increased dryness, along with deforestation to make way for agriculture, could cause a decline in Amazon tree species richness of nearly 60 percent. (What are the possible reasons for the decreasing number of Amazon tree species?)Among the annoying challenges facing the middle class is one that will probably go unmentioned in the next presidential campaign: What happens when the robots come for their jobs?Don't dismiss that possibility entirely. About half of U.S. jobs are at high risk of being automated, according to a University of Oxford study, with the middle class disproportionately squeezed. Lower-income jobs like gardening or day care don't appeal to robots. But many middle-class occupations-trucking, financial advice, software engineering — have aroused their interest, or soon will. The rich own the robots, so they will be fine.1.Who will be most threatened by automation? _____. (关键词)[A] Leading politicians. [B]Low-wage laborers.[C] Robot owners. [D]Middle-class workers.The first step, as Erik Brynjolfsson and Andrew McAfee argue in The Second Machine Age, should be rethinking education and job training. Curriculums —from grammar school to college- should evolve to focus less on memorizing facts and more on creativity and complex communication. Vocational schools should do a better job of fostering problem-solving skills and helping students work alongside robots. Online education can supplement the traditional kind. It could make extra training and instruction affordable. Professionals trying to acquire new skills will be able to do so without going into debt.2. Education in the age of automation should put more emphasis on _____. (句型)[A] creative potential. [B]job-hunting skills.[C] individual needs. [D]cooperative spirit.The U.S. Postal Service (USPS) continues to bleed red ink. It reported a net loss of $5.6 billion for fiscal 2016, the 10th straight year its expenses have exceeded revenue. Meanwhile, it has more than $120 billion in unfunded liabilities, mostly for employee health and retirement costs. There are many bankruptcies. Fundamentally, the USPS is in a historic squeeze between technological change that has permanently decreased demand for its bread-and-butter product, first-class mail, and a regulatory structure that denies management the flexibility to adjust its operations to the new reality3. The financial problem with the USPS is caused partly by _____. (句型、短语)[A] its unbalanced budget. [B] its rigid management.[C] the cost for technical upgrading. [D] the withdrawal of bank support.And interest groups ranging from postal unions to greeting-card makers exert self-interested pressure on the USPS’s(美国邮政署)ultimate overseer—Congress--insisting that whatever else happens to the Postal Service, aspects of the status quo they depend on get protected. This is why repeated attempts at reform legislation(立法)have failed in recent years, leaving the Postal Service unable to pay its bills except by deferring vital modernization.4. The USPS fails to modernize itself due to_____. (句子间逻辑,指代词)[A] the interference from interest groups. [B] the inadequate funding from Congress.[C] the shrinking demand for postal service. [D] the incompetence of postal unions.Now comes word that everyone involved---Democrats, Republicans, the Postal Service, the unions and the system's heaviest users—has finally agreed on a plan to fix the system. Legislation is moving through the House that would save USPS an estimated $28.6 billion over five years, which could help pay for new vehicles, among other survival measures. Most of the money would come from a penny-per-letter permanent rate increase and from shifting postal retirees into Medicare. The latter step would largely offset the financial burden of annually pre-funding retiree health care, thus addressing a long-standing complaint by the USPS and its union.5. The long-standing complaint by the USPS and its unions can be addressed by_____.(句型)[A] removing its burden of retiree health care.[B] making more investment in new vehicles.[C] adopting a new rate-increase mechanism.[D] attracting more first-class mail users.Financial regulators in Britain have imposed a rather unusual rule on the bosses of big banks. Starting next year, any guaranteed bonus of top executives could be delayed 10 years if their banks are under investigation for wrongdoing. The main purpose of this “clawback” rule is to hold bankers accountable for harmful risk-taking and to restore public trust in financial institutions. Yet officials also hope for a much larger benefit: more long-term decision-making, not only by banks but by all corporations, to build a stronger economy for future generations.6. One motive in imposing the new rule is to_____.(同义词)A. guarantee the bonuses of top executives.B. enhance bankers’ sense of responsibility.C. build a new system of financial regulation.D. help corporations achieve larger profits.“Short-termism,” or the desire for quick profits, has worsened in publicly traded companies, says the Bank of England’s top economist, Andrew Haldane. He quotes a giant of classical economics, Alfred Marshall, in describing this financial impatience as acting like “children who pick the plu ms out of their pudding to eat them at once” rather than putting them aside to be eaten last.7. Alfred Marshall is quoted to indicate_____.(指代词)A. the solid structure of publicly traded companies.B. governments’ impatience in decision-making.C. the conditions for generating quick profits.D. “short-termism” in economic activities.The average time for holding a stock in both the United States and Britain, he notes, has dropped from seven years to seven months in recent decades. Transient investors, who demand high quarterly profits from companies, can hinder a firm’s efforts to invest in long-term research or to build up customer loyalty. This has been dubbed “quarterly capitalism.”8. It is argued that the influence of transient investment on public companies can be (词汇)A. minimal.B. indirect.C. adverse.D. temporary.F or the past several decades, it seems there’s been a general consensus on how to get ahead in America: Get a college education, find a reliable job, and buy your own home. (17.12.2) P209. It used to be commonly acknowledged that to succeed in America, one had to have (上下文)A.An advanced academic degree.B. an ambition to get aheadC. A firm belief in their dreamD. a sense of drive and purposeIn the US, the Sarbanes-Oxley Act of 2002 has pushed most public companies to defer performance bonuses for senior executives by about a year, slightly helping reduce “short-termism.” In its latest survey of CEO pay, The Wall Street Journal finds that “a substantial part” of executiv e pay is now tied to performance.Much more could be done to encourage “long-termism,” such as changes in the tax code and quicker disclosure of stock acquisitions. In France, shareholders who hold onto a company investment for at least two years can sometimes earn more voting rights in a company.10. The US and France examples are used to illustrate_____.(主题句、段落逻辑关系)A. the approaches to promoting “long-termism.”B. the prevalence of short-term thinking.C. the significance of long-term thinking.D. the obstacles to preventing “short-termism.”Grade inflation – the gradual increase in average GPAs (grade-point averages) over the past few decades – is often considered a product of a consumer era in higher education, in which students are treated like customers to be pleased. But another, related force – a policy often buried deep in course catalogs called “grade forgiveness” – is helping raise GPAs.11. What is commonly regarded as the cause of grade inflation? _____.(短语)A. Colleges’ neglect of GPAs.B. The influence of consumer culture.C. Students’ indifference to GPAs.D. The change of course catalogs.On June 7 Google pledged(保证)not to “design AI” that would cause “overall harm”. While the statement is vague, it represents one starting point. So does the idea that decisions made by AI systems should be explainable, transparent, and fair.12. The author’s attitude toward Google’s pledges is one of _____. (连词用法)A. contempt.B. skepticism.C. respect.D. affirmation.The World Cup is also chiefly responsible for sleep deprivation(剥夺).The worst night for sleep in the U.K. was the night of the England-Italy match on June 14.Brits stayed up a half-hour later to watch it, and then they woke up earlier than usual the next morning thanks to summer nights, the phenomenon in which the sun barely sets in northern countries in the summertime. That was nothing, though, compared to Germans, Italians, and the French, who stayed up around an hour and a half later on various days throughout the summer to watch the Cup.13. What is the major cause for Europeans’ loss of sleep?(主题句)A) The daylight savings time. B) The World Cup.C) The colorful night life. D) The summertime.The endless debate about“work—life balance”often contains a hopeful footnote about stay at home dads. If American society and business won’t make it easier on future female leaders who choose to have children,there is still the ray of hope that increasing numbers of full—time fathers will. But based on today’s socioeconomic trends,this hope is,unfortunately,misguided.14.What gives women a ray of hope to achieve work life balance? (上下文,句型)A. More men taking an extended parental leave.B. People’s changing attitudes towards family.C. More women entering business management.D. The improvement of their socioeconomic status.Could you reproduce Silicon Valley elsewhere, or is there something unique about it?It wouldn’t be surprising if it were hard to reproduce in other countries, because you couldn’t reproduce it in most of the US either. What does it take to make a Silicon Valley?It’s the right people. If you could get the right ten thousand people to move from Silicon Valley to Buffalo, Buffalo would become Silicon Valley.You only need two kinds of people to create a technology hub(中心): rich people and nerds(痴迷科研的人).Observation bears this out. Within the US, towns have become startup hubs if and only if they have both rich people and nerds. Few startups happen in Miami, for example, because although it’s full of rich people, it has few nerds. It’s not the kind of place nerds like.Whereas Pittsburg has the opposite problem: plenty of nerds, but no rich people. The top US Computer Science departments are said to be MIT, Stanford, Berkeley, and Carnegie-Mellon. MIT yielded Route 128. Stanford and Berkeley yielded Silicon Valley. But what did Carnegie-Mellon yield in Pittsburgh? And what happened in Ithaca, home of Cornell University, which is also high on the list?I grew up in Pittsburgh and went to college at Cornell, so I can answer for both. The weather is terrible, particularly in winter, and there’s no interesting old city to make up for it, as there is in Boston. Rich people don’t want to live in Pittsburgh or Ithaca. So while there are plenty of hackers(电脑迷)who could start startups, there’s no one to invest in them.Do you really need the rich people? Wouldn’t it work to have the government invest the nerds? No, it would not. Startup investors are a distinct type of rich people. They tend to have a lot of experience themselves in the technology business. This helps them pick the right startups, and means they can supply advice and connections as well as money. And the fact that they have a personal stake in the outcome makes them really pay attention.1. What do we learn about Silicon Valley from the passage?A) Its success is hard to copy anywhere else.B) It is the biggest technology hub in the US.C) Its fame in high technology is incomparable.D) It leads the world in information technology.2. What makes Miami unfit to produce a Silicon Valley?A) Lack of incentive for investments. B) Lack of the right kind of talents.C) Lack of government support. D) Lack of famous universities.3. In that way is Carnegie-Mellon different from Stanford, Berkeley and MIT?A) Its location is not as attractive to rich peopleB) Its science department are not nearly as goodC) It does not produce computer hackers and nerdsD) It does not pay much attention to business startups4. What does the author imply about Boston?A) It has pleasant weather all year round.B) It produces wealth as well as high-techC) It is not likely to attract lots of investor and nerds.D) It is an old city with many sites of historical interest.5. What does the author say about startup investors?A) They are especially wise in making investments.B) They have good connections in the government.C) They can do more than providing money. D) They are enough to invest in nerds.Professor Stephen Hawking has warned that the creation of powerful artificial intelligence (AI) will be “either the best, or the worst thing, ever to happen to humanity”, and praised the creation of an academic institute dedicated to researching the future of intelligence as “crucial to the future of our civilisation and our species”.Hawking was speaking at the opening of the Leverhulme Centre for the Future of Intelligence(LCFI) at Cambridge University, a multi-disciplinary institute that will attempt to tackle some of the open-ended questions raised by the rapid pace of development in AI research. “We spend a great deal of time study in history,” Hawking said, “which, let’s face it, is mostly the history of stupidity. So it’s a welcome change that people are studying instead the future of intelligence.”While the world-renowned physicist has often been cautious about AI, raising concerns that humanity could be the architect of its own destruction if it creates a super-intelligence with a will of its own, he was also quick to highlight the positives that AI research can bring. “The potential benefits of creating intelligence are huge,” he said. “We cannot predict what we might achieve when our own minds are amplified(增强) by AI.Perhaps with the tools of this new technological revolution, we will aim to finally eradicate disease and poverty. And every aspect of our lives will be transformed. In short, success in creating AI could be the biggest event in the history of our civilisation.” AI pioneer Margaret Boden, professor of cognitive science at the University of Sussex, praised the progress of such discussions. As recently as 2009, she said, the topic wasn’t taken seriously, even among AI researchers. “AI is hugely exciting,” she said, “but it has limitations, which present grave dangers given uncritical use.”The academic community is not alone in warning about the potential dangers of AI as well as the potential benefits. A number of pioneers from the technology industry, most famously the entrepreneur Elon Musk, have also expressed their concerns about the damage that a super-intelligent AI could do to humanity.1. What did Stephen Hawking think of artificial intelligence?A) It would be vital to the progress of human civilisation.B) It might be a blessing or a disaster in the making.C) It might present challenges as well as opportunities.D) It would be a significant expansion of human intelligence.2. What did Hawking say about the creation of the LCFI?A) It would accelerate the progress of AI research.B) It would mark a step forward in the AI industry.C) It was extremely important to the destiny of humankind.D) It was an achievement of multi-disciplinary collaboration.3. What did Hawking say was a welcome change in AI research?A) The shift of research focus from the past to the future.B) The shift of research from theory to implementation.C) The greater emphasis on the negative impact of AI.D) The increasing awareness of mankind’s past stupidity.4. What concerns did Hawking raise about AI?A) It may exceed human intelligence sooner or later.B) It may ultimately over-amplify the human mind.C) Super-intelligence may cause its own destruction.D) Super-intelligence may eventually ruin mankind.5. What do we learn about some entrepreneurs from the technology industry?A) They are much influenced by the academic community.B) They are most likely to benefit from AI development.C) They share the same concerns about AI as academics.D) They believe they can keep AI under human control.。
北极涛动与南极涛动的协同变率方克艳;董志鹏;李颖俊;周非飞;曹新光【摘要】北极涛动和南极涛动是调节全球中高纬度年际气候变率的主要因子.目前已有大量研究分别针对其变率、机理及其对区域气候的影响,然而对北极涛动和南极涛动之间的协同变化特征和机理仍然认识不清,限制了对南北半球气候变化相互作用的理解.研究北极涛动和南极涛动指数之间的差值与它们的和来讨论二者之间的反相与同相变化.结果表明,北极涛动与南极涛动之间的反相变化主要受到北极涛动异常的影响,南北半球之间气候带的移动及其伴随着北极涛动异常可能是导致二者出现反相变化的主要原因.北极涛动和南极涛动之间的同相变化对应于两个半球中纬度高压区的同相变化,这可能是两个半球哈德莱环流增强导致两个涛动出现同相变化.基于树轮重建的北极涛动和南极涛动能较好地恢复低频变化(如年代际变率),但对重建其高频变率(如年际变率)方面的效力不足.%Arctic Oscillation(AO)and Antarctic Oscillation are the two most important climate pat-terns that modulate interannual climate variability of middle and high latitudes of both hemispheres. Numerous studies have been conducted on the variability and mechanisms of AO and AAO as well as their linkages with regional climate anomalies.However,little attention has been paid on their co-vari-ability, which can shed lights on the interactions between inter-hemispheric climate changes.This study calculated the residuals and plus between AO and AAO to account for the in-phase and anti-phase variations between them.We found that the in-phase changes between AO and AAO are associ-ated with anomalies in AO changes,which may be caused by the inter-hemispheric shifts of the climate zones.The anti-phasechanges between AO and AAO are associated with the in-phase changes of the pressures of the middle latitudes.This indicates that the enhancement the Hadley Cell contributes to the in-phase changes between them.The tree-ring based reconstructions of AO and AAO can well re-cord their long-term patterns,such as the interdecadal variability,but have difficulties in recording the short-term changes,such as the interannual variability.【期刊名称】《亚热带资源与环境学报》【年(卷),期】2017(012)004【总页数】11页(P1-11)【关键词】北极涛动;南极涛动;年际变化;树轮;相位【作者】方克艳;董志鹏;李颖俊;周非飞;曹新光【作者单位】福建师范大学地理研究所,福州350007;福建师范大学地理科学学院,福州350007;湿润亚热带生态-地理过程教育部重点实验室,福州350007【正文语种】中文【中图分类】P467;P463.220 引言年际(1—10年)和年代际(10—100年)气候变化与社会经济可持续发展密切关联,是气候变化重点关注的时间尺度。
阅读原文:Plant communities assemble themselves flexibly, and their particular structure depends on the specific history of the area. Ecologists use the term “succession”to refer to the changes that happen in plant communities and ecosystems over time. The first community in a succession is called a pioneer community, while the long-lived community at the end of succession is called a climax community. Pioneer and successional plant communities are said to change over periods from 1 to 500 years. These changes—in plant numbers and the mix of species—are cumulative. Climax communities themselves change but over periods of time greater than about 500 years.植物群体可以自由地聚集,它们特殊的结构取决于聚集区域的具体历史。
生态学家使用“演替”来诠释植物群落和生态系统随着时间推移所发生的变化。
演替中的第一个群落被称作先锋群落,而处于演替最后那个长期生存的群落被称为顶极群落。
先锋群落和紧接着的植物群落的变化周期是从1到500年不等,植物数量和混合种类数量的变化是慢慢积累的。
综合英语2综合英语(2) · Unit 1 单元练习Mary is ____ person I’ve ever met before.A. most famousB. more famousC. the more famousD. the most famous正确答案:DI’ve read Tom’s _____ book.A. latelyB. lateC. lastD. latest正确答案:D---I am wondering if you’d like _____ and go out to eat?---I’d like to.A. to make a breakB. making a breakC. to take a breakD. taking a break正确答案:CDid you do anything special ___ the winter vacation?A. onB. overC. atD. when正确答案:BSilver’s book has just _____ as a movie.A. come inB. come outC. come onD. come back正确答案:BI am looking forward ______ tomorrow morning.A. to meeting youB. to meet youC. meet youD. meeting you正确答案:AI didn’t take a holiday last winter. ________?A. You didB. You hadC. You didn’tD. You hadn’t正确答案:C–Are you not Mr. Smith?—________?A. Yes, I am not Mr. Smith.B. No, I am Mr. Smith.C. Yes, I am Mr. Smith.D. No, you are not Mr. Smith.正确答案:CThe Great Wall is ______ wall in the world.A. the most longB. the longerC. the longestD. most longest正确答案:CThis is very important, ______?A. is itB. isn’t itC. isn’t thisD. is this–Carol! Hi!–Hi, Anita! How are you?–A. Just fine, thanks. What’s new?B. Not bad, thank you. What’s wrong?C. How are you? Long time no see!正确答案:A–What’s new with you?–Well, I’m not working at the bank any more.–A. Aren’t you?B. Are you?C. You aren’t?正确答案:C–I’ve read the book you introduced. It’s exciting, isn’t it?–A. It really is.B. It is really.C. Really is it.–Eric, tell me about your trip. How was it?–Well… it wasn’t the best vacation I’ve ever taken.–Really? How come?–A. Actually, the food was pretty good. I found a wonderful restaurant. Some of their seafood dishes were the best I’ve ever tasted.B. At the hotel I booked they said they had lost my reservation and had no rooms left. Sooo…I had to stay in another hotel, a really disgusting place.C. The scenery was fabulous…beautiful clean waters with blue skies. And the tropical rain forest… that part was fantastic.正确答案:B–Have you read Clancy’s latest book, the one that just came outas a movie? It’s exciting, isn’t it?–A. I thought it was perfect, but to tell you the truth, I didn’tthink it was that exciting.B. I thought it was O.K., but to tell you the truth, I didn’t think it was that exciting.C. Yes, I have.正确答案:BLaptop(便携式)computers are popular all over the world. People use them on trains and airplanes, in airports and hotels. These laptops connect people to their work place. In the United States today, laptops also connect students to their classrooms.WestlakeCollege in Virginia will start a laptop computer programthat allows students to do school work anywhere they want. Within five years, each of the 1,500 students at the college will receive a laptop. The laptops are a part of a $10 million computer program at Westlake, a 110-year-old college. The students with laptops will also have access to the Internet. In addition, they will be able to use e-mail to “speak”with their teachers, their classmates, and their families. However, the most important part of the laptop program is that students will be able to use computers without going to computer labs. They can work with it at home, in a fast-food restaurant or under the trees-anywhere at all!Because of the many changes in computer technology, laptop use in higher education, such as colleges and universities, is workable. As laptops become more powerful, they become more similar to desktop computers. In addition, the portable computers can connect students to not only Internet, but also libraries and other resources. State higher-education officials are studying how laptops can help students. State Officials also are testing laptop programs at other universities, too.At WestlakeCollege, more than 60 percent of the staff use the computers. The laptops will allow all teachers to use computers in their lessons. As one Westlake teacher said, “Here we are in the middle of Virginia and we’re giving students a window on the world. They can see everything and do everything.”The main purpose of the laptop program is to give each student a laptop to ____.A. access the InternetB. work at homeC. use for their schoolworkD. connect them to libraries正确答案:CWhy is the word “speak” in the second paragraph in quotation mark?A. They don’t really talkB. They use the computer languageC. Laptops have speakersD. None of the above reasons is correct正确答案:AWhich of the following is true about WestlakeCollege?A. It is an old college in America.B. All teachers use computers.C. 1,500 students have laptops.D. Students there can do everything.正确答案:AA window on the world in the last paragraph means that students can____.A. attend lectures on information technologyB. travel around the worldC. get information from around the worldD. have free laptops正确答案:CWhat can we infer(推断)from this passage?A. The program is successful.B. The program is not workable.C. The program is too expensive.D. We don’t know the result yet.正确答案:D综合英语(2) · Unit 2 单元练习I will keep my eyes ____, and if I find it, I will phone you.A. openlyB. opennessC. openD. opening正确答案:CI really don’t want to go there. I’d just as soon go back to the hotel.A. goB. goingC. wentD. gone正确答案:AI happened _____ a friend when I was in Shenyang.A. meetB. to meetC. meetingD. to meeting正确答案:BDo you ____ your boss?A. get along well withB. get alone well withC. get along well onD. get alone well on正确答案:ACan you start _____ now?A. to workB. workC. to workingD. of working正确答案:AI miss ______ my families and friends very much.A. seeingB. to seeC. to seeingD. see正确答案:AIt takes me ___ much money to buy this pair of shoes.A. suchB. veryC. soD. more正确答案:CI am thinking _______ the Forbidden City and the Great Wall.A. to visitB. of visitC. to visitingD. of visiting正确答案:DIn Britain young boys have been enjoyed _____ football since the twelfth century.A. playB. to playC. playedD. playingI have heard him ____ about you often.A. to talkB. talkC. talkingD. to talking正确答案:B–How do you like living in Beijing?–A. I love it. Beijing is such a fascinating city.B. I love it. I get homesick at times. I miss my parents in Chicago.C. Oh, sure, a little only. It is so lovely.正确答案:A– You’ve made a lot of new friends here, haven’t you?–A. I like it a lot. Everyone’s been very nice.B. Oh, yes. I really like the people in Toronto, but I miss my friends and family back home. I still get homesick sometimes.C. Of course. Toronto’s different from Brazil, right?––I wish I did. I’ll keep my ears open. Maybe I’ll hear of someone suitable.A. Hey, you wouldn’t happen to know a good cabinetmaker who’s out of work, would you?B. You mean you lost your assistant?C. Didn’t you already speak some Chinese when you got here?正确答案:A–Did you have any trouble getting used to the way of life here?–A. Don’t worry. You’ll get used to it later.B. Oh, sure, a little at first. But I’m pretty used to it by now.C. I hope so. I’m looking forward to seeing Beijing.正确答案:B–I’m impressed. When you gave directions to the taxi driver, you sounded just like a native. Do you understand everything now?–A. Well, not quite. I still have trouble expressing myself.B. A little. But I used to have a lot of trouble with the pronunciation.C. Not everything. I still have some trouble understanding people, especially when hey speak fast.正确答案:CRichard Williams works hard. He’s clever, careful, and fast. His workis dangerous. Richard thinks of himself as a professional—aprofessional thief.Yesterday was a typical day. Richard dressed in a business suit, took his briefcase (手提箱), and drove to a town about ten miles fromhis home. He parked his car in a busy area, then began to walk along the street. No one looked at him. He was another businessman walking to work.At 8:05, Richard saw what he wanted. A man was leaving his house. Richard walked around the block again. At 8:10, he watched a woman leave the same house. After she left, Richard worked quickly. He walked to the side of the house and stood behind a tree. He took a screwdriver (螺丝刀) out of his briefcase and quickly opened the window and climbed in. First, he looked through the desk in the living room. He found $200 in cash.In the dining room, he put the silverware (银器) into his briefcase. The next stop was the bedroom. Richard stole a diamond ring and an emerald (祖母绿宝石) necklace. Richard passed a color TV, a stereo (音响), and a camera, but he didn’t touch them. Everything had to fit into his briefcase. In less than five minutes, Richand climbed back out the window. He looked around carefully, then began his walk down the street again. No one looked at him. He was just another businessman, walking to work.Why did Richard wear a business suit?A. Because he is a professional.B. Because he didn’t want to draw others’ attention to him.C. Because he works hard.D. Because he is a thief.正确答案:B2 Richard ____ , after the man left his house.A. stood behind a treeB. entered the houseC. walked around the block againD. opened the window with a screwdriver正确答案:CNo one saw Richard get into the house because ____ .A. it was night timeB. he ran very fastC. he stood behind a treeD. he was very clever正确答案:CHow long did Richard stay in the house?A. Five minutes.B. One hour.C. Nearly five minutes.D. Fifteen minutes.正确答案:CThe reason why Richard didn’t take the TV set is that ____ . A. it is too big to carryB. it is too heavy to carryC. it is worth nothingD. it is difficult for him to carry such a thing without being noticed正确答案:D综合英语(2) · Unit 3 单元练习When he returns home, he always ______ money.A. asks forB. asks toC. asks aboutD. asks正确答案:ATom is always ready to offer his help. He is the right man that I can ______.A. ask forB. depend onC. talk toD. take after正确答案:B---Must I leave now?---No, you ______.A. mustn’tB. needn’tC. may notD. can’t正确答案:BMy wife was just ______ to manager.A. providedB. promisedC. producedD. promoted正确答案:DI need someone to ______ my daughter.A. lookB. take care ofC. seeD. make fun of正确答案:BMy husband ______ a couple weeks ago.A. is laid offB. was laid offC. is lay offD. was lay off正确答案:BThe meeting ____ in Room 121 tomorrow morning.A. was heldB. is heldC. will heldD. will be held正确答案:DMuch attention must ____ to the development of science and technology.A. payB. to payC. be paidD. have paid正确答案:CSome books were given ___ him by a teacher.A. withB. forC. toD. by正确答案:CHe did it without _____.A. to askB. askingC. being askedD. to be asked正确答案:C––No, I’m not hungry. Besides, I’d rather read my book.A. Aren’t you going to go to the supermarket now?B. Aren’t you going to have lunch?C. Aren’t you going to appreciate a fabulous ballet?正确答案:B–Anita was accepted this fall at U.C. Berkeley, so she’s taking some time off to get a master’s degree.–A. That sounds exhausting.B. Good for her.C. You bet.正确答案:B––I need someone to take care of my little girl after school.A. What are you the classifieds for?B. What kind person are you waiting for?C. Why do you say that?正确答案:A–You look worn out, Tom.–A. Yeah, well, we just moved into a new apartment last weekend.B. Yeah, well, I just got up.C. Yeah, I feel great.正确答案:A–The Joy Luck club… What’s this book about?– A. Oh, you know, someone who’s mature…someone who’s good with children… a responsible person I can count on who’s willing to make dinner.B. Well, a group of Chinese women who live in San Francisco. The main character is an American-born woman whose mother came from China.C. It’s written by Amy Tan.正确答案:BThe blue eyes that looked at him from outside the door were like the light through a magnifying glass (放大镜) when it is at its brightestand smallest, when paper and leaves begin to smoke.“Hey,” said the man in the door. “Remember me?”“Yes,” the boy said, whispering. “Rick.”He felt so surprised to see Rick. All of Rick seemed to be shown in the eyes, with a strong feeling that ought to have hurt him“You knew me,” Rick said. “You hadn’t forgotten.”“You’re ——just the same,” the boy said, and felt much thankful.He seemed even to be wearing the same clothes, the same blueshirt and grey trousers. He was thin, but he was built to be lean; and he was still, or again, sunburnt (晒黑了). After everything, the slow white smile still showed the slight feeling of happiness.“Let’s look at you,” Rick said, dropping into a chair. Then slowly he felt more at home, and he became once more just Rick, as if nothing had happened. There were lines about his eyes, and deeper lines on his cheeks (面颊), but he looked like——just Rick, lined by sunlight and smiling.“When I look at you,” he said, “You make me think about me,for we look like each other.”“Yes,” said the boy, eagerly, “they all think we both looklike my grandfather.”On his return, Rick ______.A. had not changed muchB. looked very oldC. was much thinner than beforeD. was wearing different clothes正确答案:ARick and the boy are probably ______.A. brothersB. relatedC. friendsD. neighbours正确答案:BYou could describe Rick as ______.A. old and friendlyB. old and nervousC. thin and nervousD. thin and friendly正确答案:DFrom the passage we can tell that the boy ______.A. was worried that Rick had forgotten himB. was proud of what Rick had doneC. was pleased to see RickD. wondered where Rick had been正确答案:CRick and the boy ______.A. had similar personalitiesB. cared about each otherC. had lived in the same houseD. felt their friendship had changed 正确答案:B综合英语(2) · Unit 4 单元练习---Why don’t we meet right after work today?---That’s fine ____ me.A. forB. toC. onD. with正确答案:DYesterday I met him ____ chance.A. byB. toC. forD. on正确答案:AIt is ______ news for all the people here.A. an encouragedB. encouragingC. encouragedD. an encouraging正确答案:BI apologized ____ you ____ not finishing the work.A. for, forB. to, toC. for, toD. to, for正确答案:DWe need _______ ten hundred yuan.A. at needB. in needC. at leastD. at less正确答案:CWhat a surprise! Bill passed the exam. He ____ hard this time.A. must studyB. should studyC. must have studiedD. may have studied正确答案:C______ student should come on time.A. EveryB. EachC. AllD. Whole正确答案:AI will be free _______ week.A. allB. wholeC. the allD. the whole正确答案:DHe could not read ___ of the books Mary lent to him.A. someB. anyC. everyD. whole正确答案:BI have done everything _____ the cleaning.A. butB. except forC. besideD. besides正确答案:A–It’s such a perfect day. Say, why don’ we pack a picnic lunch and go to the park? We can invite some other people to come to—Nancy, Rob, charlotte, Ben, their kids…––Anything is fine with me.A. That’s one of the best ideas I’ve heard in weeks. What should we take on the picnic?B. I’d like to very much, but I have to prepare for my examination.C. That’s great! Shall we go to the seaside for a walk?正确答案:A–.–It’s behind the door. But it’s so warm outside, so you don’t need to wear it at all.A. Where are my glasses?B. Where is my jacket?C. Where is my necklace?正确答案:B–.– Not offhand. You can look it up in the phone book though.A. Excuse me. Do you happen to know the time?B. Do you by any chance know the country code for Korea?C. Do you happen to know where Tahiti is?正确答案:B–I’m thinking about Mexico City.–.A. I’m going to see a travel agent tomorrow.B. That’s O.K. I’ve been busy lately, too.C. You are? I love it too. It’s a really exciting place.正确答案:C–What’s the weather like today?–.–Shall we go swimming?A. It’s windy.B. It’s a sunny summer day.C. It’s quite cold.正确答案:BThe year was 193 Amelia Earhart was flying alone from North America to England in a small single-engined aeroplane. At midnight, several hours after she had left Newfoundland, she ran into bad weather. To make things worse, her altimeter (高度表) failed and she didn’t know how high she was flying. At night, and in a storm, a pilot is in great difficulty without an altimeter. At times, her plane nearly plunged (冲) into the sea.Just before dawn, there was further trouble. Amelia noticed flames (火焰) coming from the engine. Would she be able to reach land? There was nothing to do except to keep going and to hope.In the end, Amelia Earhart did reach Ireland, and for the courage she had shown, she was warmly welcomed in England and Europe. When shereturned to the United States, she was honored by President Hoover at a special dinner in the White House. From that time on, Amelia Earhart was famous.What was so important about her flight? Amelia Earhart was the first woman to fly the Atlantic Ocean alone, and she had set a record of fourteen hours and fifty-six minutes.In the years that followed, Amelia Earhart made several flights across the United States, and on each occasion (时刻) she set a new record for flying time. Amelia Earhart made these flights to show that women had a place in aviation (航空) and that air travel was useful.Which of the following statements is NOT the difficulty which Amelia Earhart met in her flight from north America to England?A. She was caught in a storm.B. The altimeter went out of order.C. Her engine went wrong.D. She lost her direction.正确答案:D2 When Amelia Earhart saw flames coming from the engine, what did she do?A. She did nothing but pray for herself.B. She changed her direction and landed in Ireland.C. She continued flying.D. She lost hope of reaching land.正确答案:C2 According to the passage, what was Amelia Earhart’s reason for making her flights?A. To set a new record for flying time.B. To be the first woman to fly around the world.C. To show that aviation was not just for men.D. To become famous in the world.正确答案:C2 Which of the following statements was NOT mentioned?A. She was the first woman who succeeded in flying across the Atlantic Ocean alone.B. She showed great courage in overcoming the difficulties during the flight.C. She was warmly welcomed in England, Europe and the United States.D. She made plans to fly around the world.正确答案:D2 Which of the following would be the best title for the passage?A. Amelia Earhart—First Across the Atlantic.B. Amelia Earhart—Pioneer in Women’s Aviation.C. A New Record for Flying Time.D. A Dangerous Flight from North America to England.正确答案:B综合英语(2) · Unit 5 单元练习I couldn’t find my glasses at first, but later, it turned that they were in the drawer.A. outB. upC. inD. off正确答案:AThey are now living _____.A. separateB. separatelyC. separableD. separated正确答案:BI am learning _____ the piano.A. playB. playingC. to playD. for playing正确答案:CI ________ in Shenyang in 200A. was marriedB. got marriedC. marriedD. being married正确答案:BI miss you ____ me cups of tea in the mornings.A. to bringB. bringC. bringingD. to bringing正确答案:CMy husband is English, and I ____ there for twenty years.A. have livedB. had livedC. am livingD. lived正确答案:AThe new book _____ yet?A. hasn’t arrivedB. didn’t arriveC. doesn’t arriveD. haven’t arrived正确答案:AWhen I was at school, I ____ to the library every day.A. goB. was goingC. have goneD. went正确答案:DChristianity _____ a worldwide religion since it ____ two thousand years ago.A. became, beganB. become, has begunC. has become, beganD. has become, has begun正确答案:CWe ____ camping in the mountains last week.A. goB. wentC. is goingD. was going正确答案:B––I love that one, too. It was painted by a young Brazilian artist.A. What a wonderful painting!B. What is the painting about?C. This painting is a gift for your birthday.正确答案:A––It is, and we’re both so busy. If we had more time, we’d visit it more often. But right now, it’s difficult.A. Florida’s pretty.B. Florida’s pretty far away.C. Florida’s pretty near.正确答案:B––No, we’ve already been living here for four years.A. Did you just move to the Bay area?B. Are you local people here?C. Have you been here for a long time?正确答案:A–What do you think about Japanese food?–.A. A big change was using public transportation in Tokyo.B. Overall, the diet there is a healthy one—low fat.C. I didn’t have a lot of time to prepare food, so much of my experience comes from eating in restaurants.正确答案:B–Would you like to see a menu?–.A. No, thanks. I have a lot of homework to do.B. No, thanks. I already know what to order.C. No, please don’t bother me.正确答案:B“WORDS are very powerful, they can get things done for us, but then a word and a gun makes it much easier.”These are the words of the most powerful man in the Middle East, the man who has the eyes of the world focused on him - Iraqi President Saddam Hussein.Saddam agreed last Tuesday to let arms inspectors (武器核查员) back into Iraq under existing (现有的) UN agreements reached in February, 199 However, the US Government continues to demand access (进入)to Saddam’s eight palaces.The US believes that Saddam has been building weapons of mass destruction (大面积杀伤性武器) in Iraq. They want to be allowed to inspect Saddam’s palaces because they believe that otherwise he may try to hide a nuclear, chemical or biological weapon inside one ofthem.America claims they are so worried because it feels they may be the target (目标) of such a weapon after the terrorist attacks in New York and Washington last year. On October 2, 2002, US President George W. Bush got the support he wanted from the Congress (国会) for a military attack on Iraq if Iraq doesn’t agree to a full inspection.A son of a poor peasant, Saddam came into power in 197 He led Iraq through a decade long war with Iran in the 1980s, and in August, 1990 Iraqi forces invaded Kuwait (科威特). A US-led alliance (联盟) ran Saddam’s forces out of Kuwait in the Gulf War, which ended in February of 1991,with Saddam still in power.Iraqis will vote (投票) on October 15 probably to give Saddam Hussein another seven-year mandate (授权).“All Iraqis love Saddam Hussein and he will win 100 percent of the vote,” said Khalil Khamis, a sculptor (雕塑家).The vote, however, risks being overshadowed (笼罩) by the return of UN arms inspectors, expected in mid-October.In the fourth paragraph, “them” in “inside one of them” refers to_____.A. weaponsB. Saddam’ s palacesC. arms inspectorsD. he US正确答案:B2 About Saddam, which of the following statements is NOT true?A. He is the president of Iraq.B. He is a son of a poor peasant.C. He took part in the war with Iran in 1980sD. In the vote of Iraq on October 15, he will retire.正确答案:D2 From the essay, the war between Iraq and Kuwait lastedfor___months.A. 4B. 5C. 7D. 9正确答案:C2 Which of the following statements is not the opinion of US to Iraq?A. Saddam should allow arms inspectors access to his palaces.B. Saddam has been building weapons of mass destruction in Iraq.C. US can accept the fact that Saddam is elected to be the president of Iraq again.D. US will give a military attack on Iraq if Iraq doesn’t agree to a full inspection.正确答案:C2 What is the main idea of this essay?A. Saddam is the most powerful man in the Middle East.B. Saddam will be the president for another 7 years.C. The Saddam’s history and the attitude of US towards IraqD. There may be a war between US and Iraq again.正确答案:C综合英语(2) · Unit 6 单元练习He’s had his license endorsed ______ dangerous driving.A. inB. onC. forD. of正确答案:CI have been meaning ______ this digital camera.A. getB. gettingC. to getD. for getting正确答案:CAs a result of these ______ several ministers resigned from the government.A. expositionsB. expressionsC. exponentsD. exposures正确答案:DThere is one McdDonald’s, not too far ______ the drugstore.A. offB. fromC. outD. away正确答案:BHe represented himself ______ an export.A. likeB. forC. toD. as正确答案:DI need have my brother ______ me with my English.A. helpsB. helpC. to helpD. helping正确答案:BWould you like _____ with me?A. goB. goingC. to goD. being gone正确答案:CJohn is a ___________ boy.A. twelve years oldB. twelve-year-oldC. twelve-year-old’sD. twelve- years’ old正确答案:BWe continued our way ______ the storm had passed.A. whileB. whenC. asD. since正确答案:BCould you have them ______ the meat?A. weighingB. weighC. weighedD. to weigh正确答案:B–That’s 14 pounds. How are you paying?–A. By plane, I think.B. Cash… Here you are.C. Thank you. Here’s your change, 6 pounds.正确答案:B–I’m going downtown to run some errands.–.– Well, the bookstore will be closed by the time I get there. A. While you are downtown, could you get me a book of first-class stamps?B. While you are downtown, would you please send this letter for me?C. While you are downtown, do you think you might be near the bookstore? There’s a paperback book I want to get…正确答案:C– Why are you in such a hurry?–.A. I just got up and feel still sleepy.B. My mother is ill. She has been sent to the hospital. My father asked me to go back immediately.C. No, I don’t, but that’s a good question.正确答案:B– What do you find hardest in English?–.–Well, you just need lots of practice. Why don’t you buy a radio? The more you listen to English, the easier it becomes.A. I find listening really hard. Sometimes it’s just impossible to understand.B. I’m limited in , which influences my and writing.C. I don’t like English at all.正确答案:A– It’s so cold here!–.A. What makes you so happy?B. Why not turn on the heating?C. Really? That’s interesting.正确答案:BOne important aspect of retirement for most people is deciding where to live. In the past, this was not an issue because most elderly persons remained at home where they could be close to family. In contemporary times, parents and grown children go their separate ways, staying in touch through the telephone and, more recently, through e-mail. Every year, more than 400,000 adults who are 55 or older move out of their home state and relocate.Florida leads all states in the proportion of elderly people -19 percent over 65 years of age, most of whom relocated from other places. Thus, Florida cities have become known as retirement centers. Among those prominently mentioned are Boca Raton, Daytona Beach, Fort Lauderdale, Fort Myers, Naples, and Ocala where between 20 and 25 percent of the residents are over 65 years of age. Two other Florida cities, Saint Petersburg and Sarasota, have even higher proportions-25 percent and 32 percent respectively. Other cities that have gained reputations as retirement centers with large number of elderly are Savannah, Georgia, Prescott and Scottsdale, Arizona, Palm Springs, California, and Asheville, North Carolina. Even tourist centers like Las Vegas and Reno, Nevada, where residents pay no income tax and no inheritance or estate taxes, are attracting growing numbers of seniors.。
ListeningSECTION 1 Questions 1-10 Questions 1-6Complete the notes belowWrite NO MORE THAN TWO WORDS AND/OR A NUMBER for each answer.Questions 5and6Choose Two letters A-EWhich Two things are included in the price of the tour?A fishing tripB guided bushwalkC reptile park entryD table tennisE tennisQuestions 7-10Complete the sentences belowWrite NO MORE THAN THREE WORDS AND/OR A NUMBER for each answer7 The tour costs $..........................8 Bookings must be made no later than..........................days in advance.9 A..........................deposit is required..10 The customer’s reference number is..........................SECTION 2 Questions11-20Questions 11-15Complete the table belowWrite NO MORE THAN THREE WORDS for each answerQuestions 16-20Complete the notes belowSECTION 3 Questions 21-30 Questions 21-24Complete the notes belowQuestions 25 and 26Choose TWO letters A-EWhat TWO disadvantages of the questionnaire form of data collection do the students discuss?A The data is sometimes invalidB Too few people may respondC It is less likely to reveal the unexpectedD It can only be used with literate populationsE There is a delay between the distribution and return of questionnaires Questions 27-30Complete the table belowWrite NO MORE THAN THREE WORDS OR A NUMBER for each answer.ReadingYou Should spend about 20 minutes on Questions 27-40. Which are based on Reading Passage 3 belowThe topics discussed included the co-ordinated study of the destruction of forests, as well as how to combat forest fires and the extension of European research programs on the forest ecosystem. The preparatory work for the conference had been undertaken at two meetings of experts. Their initial task was to decide which of the many forest problems of concern to Europe involved the largest number of countries and might be the subject of joint action. Those confined to particular geographical areas, such as countries bordering the Mediterranean or the Nordic countries therefore had to be discarded. However, this does not mean that in future they will be ignored.As a whole, European countries see forests as performing a triple function: biological, economic and recreational. The first is to act as a 'green lung' for our planet; by means of photosynthesis, forests produce oxygen through the transformation of solar energy, thus fulfilling what for humans is the essential role of an immense, non-polluting power plant. At the same time, forests provide raw materials for human activities through their constantly renewed production of wood. Finally, they offer those condemned to spend five days a week in an urban environment an unrivalled area of freedom to unwind and take part in a range of leisure activities, such as hunting, riding and hiking. The economic importance of forests has been understood since the dawn of man - wood was the first fuel. The other aspects have been recognised only for a few centuries but they are becoming more and more important. Hence, there is a real concern throughout Europe about the damage to the forest environment which threatens these three basic roles.The myth of the 'natural' forest has survived, yet there are effectively no remaining 'primary' forests in Europe. All European forests are artificial, having been adapted and exploited by man for thousands of years. This means that a forest policy is vital, that it must transcend national frontiers and generations of people, and that it must allow for the inevitable changes that take place in the forests, in needs, and hence in policy. The Strasbourg conference was one of the first events on such a scale to reach this conclusion. A general declaration was made that 'a central place in any ecologically coherent forest policy must be given to continuity over time and to the possible effects of unforeseen events, to ensure that the full potential of these forests is maintained'.That general declaration was accompanied by six detailed resolutions toassist national policy-making. The first proposes the extension and systematisation of surveillance sites to monitor forest decline. Forest decline is still poorly understood but leads to the loss of a high proportion of a tree's needles or leaves. The entire continent and the majority of species are now affected: between 30%and 50% of the tree population. The condition appears to result from the cumulative effect of a number of factors, with atmospheric pollutants the principal culprits. Compounds of nitrogen and sulphur dioxide should be particularly closely watched. However, their effects are probably accentuated by climatic factors, such as drought and hard winters, or soil imbalances such as soil acidification, which damages the roots. The second resolution concentrates on the need to preserve the genetic diversity of European forests. The aim is to reverse the decline in the number of tree species or at least to preserve the 'genetic material' of all of them. Although forest fires do not affect all of Europe to the same extent, the amount of damage caused the experts to propose as the third resolution that the Strasbourg conference consider the establishment of a European databank on the subject. All information used in the development of national preventative policies would become generally available. The subject of the fourth resolution discussed by the ministers was mountain forests. In Europe, it is undoubtedly the mountain ecosystem which has changed most rapidly and is most at risk. A thinly scattered permanent population and development of leisure activities, particularly skiing, have resulted in significant long-term changes to the local ecosystems. Proposed developments include a preferential research program on mountain forests. The fifth resolution relaunched the European research network on the physiology of trees, called Eurosilva. Eurosilva should support joint European research on tree diseases and their physiological and biochemical aspects. Each country concerned could increase the number of scholarships and other financial support for doctoral theses and research projects in this area. Finally, the conference established the framework for a European research network on forest ecosystems. This would also involve harmonising activities in individual countries as well as identifying a number of priority research topics relating to the protection of forests. The Strasbourg conference's main concern was to provide for the future. This was the initial motivation, one now shared by all 31 participants representing 31European countries. Their final text commits them to on-going discussion between government representatives with responsibility for forests.Do the following statements agree with the information given in Reading Passage 3? In boxes 27-33 on your answer sheet, writeTRUE if the statement agrees with the informationFALSE if the statement contradicts the informationNOT GIVEN if there is no information on this27 Forest problems of Mediterranean countries are to be discussed at the next meeting of experts.28 Problems in Nordic countries were excluded because they are outside the European Economic Community.29 Forests are a renewable source of raw material.30 The biological functions of forests were recognised only in the twentieth century.31 Natural forests still exist in parts of Europe.32 Forest policy should be limited by national boundaries.33 The Strasbourg conference decided that a forest policy must allow for the possibility of change.Look at the following statements issued by the conference.Which six of the following statements, A-J, refer to the resolutions that were issued?Match the statements with the appropriate resolutions (Questions 34-39). Write the correct letter, A-J, in boxes 34-39 on your answer sheet.34 Resolution 135 Resolution 236 Resolution 337 Resolution 438 Resolution 539 Resolution 6Question 40Choose the correct letter, A, B, C or D.Write the correct letter in box 40 on your answer sheet.40 What is the best title for Reading Passage 3?A The biological, economic and recreational role of forestsB Plans to protect the forests of EuropeC The priority of European research into ecosystemsD Proposals for a world-wide policy on forest managementWriting Task 2You should spend about 40 minutes on this task.Write about the following topic:Many people think having enough money bring happiness but others think too much money can bring problems.Do you agree or disagree?Give reasons for your answer and include any relevant examples from your own knowledge or experience.Write at least 250 words.。
译林牛津英语7年级下期末易错题整理87B units 5-6一、选择。
( ) 1. ---Do you know how to get ______ MSN number on the Internet?---Oh, I have no idea about it. You can ask Tony to help you get ____.A. an; oneB. a; oneC. an; itD. the; it( )2. —Could you make a rabbit __________ paper? —Yes, I __________.A. of , canB. out of , canC. out of , couldD. of , could( )3. ---_______ is it from your school to your home?-- It’s about ______ from our school to my home.A. How long; twenty minutes’ walkB. How far; twenty minutes’ walkC. How far; twenty-minute-walkD. How long; twenty-minute-walk( )4. I often see little Tom ____ TV. Just now when I walked past his room, I saw him ____ TV again.A. watch; watchingB. watching; watchC. watch; watchD. watching; watching ( )5. The boy wasn’t listening _______ in class ,so he often missed something important.A. enough carefulB. careful carefulC. carefully enoughD. enough carefully ( )6. —Can you_______a tent by yourself ? —Sorry . It’s a little difficult for me.A. put onB. put upC. put downD. put off( )7. —Is ________ ready for the trip?—No, we still need to buy a map before we start the trip.A. anythingB. somethingC. everythingD. nothing( )8. —Could you come back home at three o’clock?—_______. The meeting in our class won’t be over at that time.A. I’m afraid notB. I think soC. Yes, I hope soD. I’m afraid so( )9. ─Kate didn't go to school yesterday, did she?─ ,because she didn't feel very well.A. Yes, she didn'tB. Yes, she didC. No, she didn'tD. No, she did( )10.--Listen, what is making a noise? --It must be a hungry cat. I can hear it _______.A.miaowingB. miaowC. to miaowD. miaows( )11 ─John, can you post this letter for me? ─. I'll walk past a post office.A.Good ideaB. No problemC. That's all rightD. Sorry, I'm too busy( )12.--I hear the film Alice in wonderland is great. Shall we see it this evening?--__________.I have plenty of homework to do.A.Why not?B.No, we don’t.C. I’m afraid not.D. I’d love to.〖答案〗ABBAC BBACABC二、完形填空。
ORIGINAL PAPERLong-term changes in tree-ring–climate relationships at Mt.Patscherkofel (Tyrol,Austria)since the mid-1980sWalter Oberhuber ÆWerner Kofler ÆKlaus Pfeifer ÆAndrea Seeber ÆAndreas Gruber ÆGerhard WieserReceived:19April 2007/Revised:2August 2007/Accepted:16August 2007/Published online:5September 2007ÓSpringer-Verlag 2007Abstract Although growth limitation of trees at Alpine and high-latitude timberlines by prevailing summer tem-perature is well established,the loss of thermal response of radial tree growth during last decades has repeatedly been addressed.We examined long-term variability of climate–growth relationships in ring width chronologies of Stone pine (Pinus cembra L.)by means of moving response functions (MRF).The study area is situated in the timber-line ecotone (ca.2,000–2,200m a.s.l.)on Mt.Patscherkofel (Tyrol,Austria).Five site chronologies were developed within the ecotone with constant sample depth (‡19trees)throughout most of the time period analysed.MRF calcu-lated for the period 1866–1999and 1901–1999for ca.200-and ca.100-year-old stands,respectively,revealed that mean July temperature is the major and long-term stable driving force of Pinus cembra radial growth within the timberline ecotone.However,since the mid-1980s,radial growth in timberline and tree line chronologies strikingly diverges from the July temperature trend.This is probably a result of extreme climate events (e.g.low winter precipi-tation,late frost)and/or increasing drought stress on cambial activity.The latter assumption is supported by a \10%increase in annual increments of ca.50-year-old trees at the timberline and at the tree line in 2003compared with 2002,when extraordinary hot and dry conditionsprevailed during summer.Furthermore,especially during the second half of the twentieth century,influence of cli-mate variables on radial growth show abrupt fluctuations,which might also be a consequence of climate warming on tree physiology.Keywords Climate warming ÁMoving response function ÁPinus cembra ÁTemperature sensitivity ÁTree ringIntroductionIt is well established that tree growth at high elevations and at northern ‘‘high’’latitudes is mainly limited by low temperatures throughout the growing season (Wardle 1971;Tranquillini 1979;Ko¨rner 1998;Wieser and Tausz 2007).Several dendroecological and dendroclimatological studies conducted throughout these ecotones have shown that the radial growth of trees is primarily limited by summer temperature (e.g.,Eckstein and Aniol 1981;Briffa et al.1990;Schweingruber et al.1993;Carrer and Urbinati 2004;Oberhuber 2004;Bu¨ntgen et al.2005;Frank and Esper 2005a ).Additionally,several authors report that tree spe-cies have been facing radial growth increases during the twentieth century,which can be related to climate warming (e.g.,Graumlich et al.1989;Peterson et al.1990;Jacoby and D’Arrigo 1997;Rolland et al.1998;Oberhuber and Kofler 2003;Bunn et al.2005).However,long-term vari-ability of the relationship between key climate variables and tree growth (ring width and/or maximum latewood density)was reported by several authors (for a review,see D’Arrigo et al.2007),which raise concern about accurate reconstruction of past climate,overestimation of carbon uptake and sequestration and tree line advance due toCommunicated by E.Beck.W.Oberhuber (&)ÁW.Kofler ÁK.Pfeifer ÁA.Seeber Institute of Botany,Sternwartestrasse 15,6020Innsbruck,Austriae-mail:walter.oberhuber@uibk.ac.atA.Gruber ÁG.WieserNatural Hazards and Landscape,Federal Research and Training Centre for Forests,Rennweg 1,6020Innsbruck,AustriaTrees (2008)22:31–40DOI 10.1007/s00468-007-0166-7climate warming(Briffa et al.1998a,b;Smith et al.1999; Barber et al.2000;Vogel and Schweingruber2001; Wilmking et al.2004;Wilson and Elling2004).Recently, studies conducted by Bu¨ntgen et al.(2006a)and Carrer and Urbinati(2006)at subalpine regions in the European Alps also documented nonstationary responses of tree-ring growth of Norway spruce(Picea abies(L.)Karst.)and European larch(Larix decidua Mill.),respectively,to summer temperature.Long-term variability in growth/cli-mate response of these widespread alpine timberline species was related to temperature-induced increase in late-summer drought stress coincidently with the recent warming trend for Norway spruce(Bu¨ntgen et al.2006a), whereas a discrimination between covarying forcing fac-tors of radial tree growth(i.e.,temperature,precipitation, nitrogen deposition,atmospheric CO2concentration)was not possible for European larch(Carrer and Urbinati2006). Long-term variability in growth sensitivity to climate of subalpine Stone pine(Pinus cembra L.),which is the dominant conifer within the Central Eastern Alps at the timberline(Ellenberg1988),has also been related to the development of drought stress due to climate warming in recent decades(Oberhuber2004).While previous work on temporal changes in climate sensitivity of Stone pine were based on the evaluation of extreme radial growth (Oberhuber2004;Pfeifer et al.2005),this paper examines the long-term variability of the response of Stone pine at the timberline and tree line to key climate variables by means of moving response functions including a bootstrap procedure to test statistical significance,which is consid-ered to be the most appropriate method to establish climate–growth relationships(Fritts1976;Briffa and Cook 1990;Guiot1991;Biondi1997).Additionally,radial growth response to the heat-wave in2003(Beniston2004) was evaluated.Material and methodsStudy areaThe sampled trees are located at Mt.Patscherkofel (2,246m a.s.l.)near Innsbruck,in western Austria (47°200N,11°300E)within the timberline ecotone at north-, south-and west-facing slopes(slope angle20–40°).Tim-berline and tree line sites stretched from2,000to2,080m a.s.l.and from2,110to2,200m a.s.l.,respectively, whereby the timberline and tree line was defined as the upper limit of the closed forest and the upper limit of trees [2m high,respectively(cf.Ko¨rner1998).At the tree line, trees were isolated in small groups and2–4m high, whereas stand height at the timberline ranged between10 and15m.Mt.Patscherkofel is situated within an inner Alpine dry zone,where the local climate is strongly influenced by warm and dry southerly winds(Foehn), which most frequently occur in spring(Fliri1975).During the period1967–2000mean annual precipitation at the top of Mt.Patscherkofel was888mm with a maximum during summer(June–August:358mm)and minimum in winter (December–February:149mm).Mean annual temperature was–0.1°C and the coldest and warmest months were February(–4.2°C)and July(11.4°C),respectively.Pinus cembra is the dominant and widespread tree species at the timberline of the Central Eastern Alps. Within the study area Norway spruce[P.abies(L.)Karst.] and European larch(L.decidua Mill.)are scattered at some locations.Soils are podzols(according to nomenclature of World reference base for soil resources,FAO2006)formed on siliceous bedrock(Neuwinger1970).Field collection,sample preparation,chronology development and statisticsChronology development was focused on establishing homogeneous and comparable age classes at the timberline and tree line.Therefore,more than150trees free of major stem or crown anomalies due to lightning,wind or snow breakage were sampled(two radii/tree).The tree species line(krummholz limit)was not included in this study.Two core samples were extracted with an increment borer at 1.3m(timberline trees)and about0.5m(tree line trees) height from opposite sides of each tree.In the laboratory, they were mounted on sample holders and the surface was prepared with a sharp razor blade(Pilcher1990).Ring widths were measured to the nearest0.01mm using an incremental measuring table.Tree ring series where grouped into three age classes(ca.200,ca.100,and ca. 50years)and those ring width series,which deviated strongly from mean age of all other trees were eliminated from further analysis.In this way,homogeneous age classes with minimal changes in variance due to changes in sample depth could be developed at the timberline and tree line(see Table1,Fig.2).The correct dating of measured tree ring series was checked by using COFECHA(Holmes1983; Grissino-Mayer2001),which identifies segments within each ring width series that may have erroneous cross-dating or measurement errors.As independent references,P.cem-bra chronologies from Mt.Patscherkofel(LaMarche and Fritts1971;Oberhuber2004)and O¨tz-valley(Siebenlist-Kerner1984)were used.Residual chronologies were calculated using ARSTAN (Cook and Holmes1984;Cook1985)with the purpose to enhance the climate signal in ring width series.First,a negative exponential curve or a linear regression line was fit to the ring series.The second step used a cubicsmoothing spline with a frequency-response cut-off set at two-thirds of the length of each series.In this way,most of the low-frequency variability in each ring series that is assumed to be unrelated to climate like tree aging and forest stand development(Cook1987)was removed. Dimensionless indices were formed by dividing the observed ring width value by the predicted ring width value.This process creates stationary time series for each tree with a mean of1and a homogeneous variance. Residual chronologies were derived from ARMA model-ling,with a robust mean value function applied to discount the effect of statistical outliers(Cook1985;Holmes1994). Residual chronologies are commonly used in dendrocli-matic studies because removal of serial autocorrelation is required for some statistical analysis.To permit a direct comparison of temperature and ring width series standardized indices z i were calculated by z-transformation according to the formula:z i¼vÀmðÞ=std;where v is the recorded temperature or ring width(after removing low-frequency variability and autocorrelation),m is the mean and std is the standard deviation(SD)of the entire series length.Several statistics were calculated for the standardized chronologies,prior to autoregressive modelling.The SD measures the variability of the measurements at all wavelengths.Thefirst-order autocorrelation assesses rela-tionships with previous growth(Fritts1976).The expressed population signal(EPS)quantifies the degree to which a particular sample chronology portrays the hypothetically perfect chronology,which may in turn be regarded as the potential climate signal(Wigley et al.1984).Although a specific range of EPS values cannot be given,Wigley et al. (1984)suggest a threshold of0.85as an acceptable statis-tical mon variance was estimated by the percentage of variance explained by thefirst component in principal component analysis.Higher common variance indicates a greater climatic influence on tree growth(Fritts 1976;Briffa and Jones1990).Climate data setsTotal monthly precipitation and mean monthly tempera-tures were collected at a meteorological station in Innsbruck(582m a.s.l),reaching back to1,866(Bo¨hm et al.2001).Hence,climate–growth relationships and moving response functions(see below)were determined for the periods1866–1999and1901–1999for ca.200-and ca.100-year-old stands,respectively.Climate records gathered at the top of Mt.Patscherkofel(2,246m a.s.l.) were not used due to short length of series(first records in 1967)and our focus on analysis of long-term variability of key climate variables on radial growth,rather than on general evaluation of climate–growth relationships(see Oberhuber2004).Pearson’s correlation analysis between key climate variables from both stations within the over-lapping time interval(i.e.1967–2005)revealed highly significant coefficients(Fig.1).Moving response function analysisClimate–growth relationships have been tested by the elaboration of‘‘response functions’’,which is a form of principal component regression designed to account for collinearity of monthly climate predictors(Fritts et al. 1971;Briffa and Cook1990).Statistical calibrations between ring width series and monthly climate variables were tested for temporal changes by applying the software package DENDROCLIM2002(Biondi1997;Biondi and Waikul2004)that computes bootstrapped response and correlation functions for single and multiple intervals. Moving response functions(MRF)are based onTable1Chronology statistics of selected stands within the timberline ecotoneSite code Trees a(n)Age b(years)RW c(1/100mm)SD c Autocorr c EPS c PC1c(%)TB20025234±878±190.180.670.8942.6TB10020113±8158±370.220.420.8853.3TB501959±9214±420.150.510.9450.3TR10020115±1776±210.220.710.8758.1TR502055±7119±370.200.570.9345.3The chronology code is based on the site location within the timberline ecotone and on the mean tree ageTB timberline,TR tree line,RW ring width,mean±SD;SD standard deviation,Autocorr lag–1autocorrelation,EPS expressed population signal,PC1%variance explained by thefirst principal component;for details see Material and methodsa Each tree with two radii from opposite sides and parallel to the contourlineb Mean values±SD;cambial age at breast height(timberline)or ca.50cm above ground(tree line)c Calculated prior to prewhitening,i.e.removing of serial autocorrelationprogressively shifting the period of afixed number of years across time to compute the response coefficients.To pro-vide a sufficient number of degrees of freedom,the length of the calibration period was100%more than the number of predictors,which was28in this study,i.e.only periods ‡56years were considered.Hence,MRF could not be performed for ca.50-year-old stands because of insuffi-cient number of years.MRF produce a temporal set of coefficients for each monthly predictor,whereby statistical significance at P£0.05was tested using a bootstrap pro-cedure(Guiot1991;Biondi and Waikul2004).MRF were arbitrarily plotted against the last year of the period.The climatic data set included mean monthly air temperature(°C)and total monthly precipitation(mm) from August of the year prior growth to September of the year of growth,i.e.28predictors.Coefficients must also be computed between ring indices and climate variables for several months before the growing season because the width of an annual ring is an integration of climatically influenced processes occurring over a longer period(Fritts1976).Response functions were determined using the residual chronologies calculated by the program ARSTAN.ResultsChronology descriptive statisticsFive growth chronologies were developed within the tim-berline ecotone(Fig.2),whereby most ring series showed an age-related exponential decrease in ring width.The influence of tree age on growth is also expressed in higher mean ring widths of younger stands.Within the same age, class mean ring width was reduced by about50%at the tree line compared to the timberline(Table1).Highfirst-order autocorrelation indicates that radial growth throughout the timberline ecotone was strongly influenced by conditions in the preceding year.Principal component(PC)analyses on the individual samples from each chronology showed that the variance accounted for by PC1ranged between43and 58%.All chronologies show EPS-values,which exceedthesuggested threshold of 0.85indicating a strong climate signal in site chronologies.Climate forcing of radial growthResponse function coefficients depicted in Fig.3show that the dominant climatic factor controlling tree ring widths of selected stands was temperature in July.Above average June temperature also favoured radial growth of ca.200-year-old trees at the timberline.Furthermore,a negative temperature coefficient in previous August and current March was found for ca.100-and ca.200-year timberline stands,respectively.At the timberline,significant direct relationships were also observed between precipitation in previous September and temperature in previous October.Residual ring width chronologies used for calculation of MRF are depicted in Fig.4.The period prior to 1866is not considered in order to match the length of the climate record used.Temporally stable and unstable key climate variables of ca.200-and ca.100-year-old stands were uncovered by comparing results of MRF (Fig.5).The strongest and long-term stable climatic signal at the tim-berline and tree line was a direct response to July temperature.June temperature was also a largely tempo-rally stable predictor of radial growth of ca.200-year-old timberline trees.Previous October temperature signifi-cantly influenced radial growth,when the calibration interval ended before 1950.Previous November tempera-ture showed a significant influence on radial growth,which lasted almost 40year around the middle period of the investigated time interval.The mean temperature of both previous October and previous November was not signifi-cantly related to growth over the whole period (1866–1999).Significant coefficients of previous September pre-cipitation were scattered up to mid-1970s.When the calibration period ended after the mid-1970s,response coefficients of climate predictors related to previous autumn (temperature in October–November and September precipitation)showed a striking decrease.March temper-ature only sporadically showed a significant influence on radial growth.Current mean July temperature was a significant and constant predictor of radial growth of ca.100-year-old trees at the timberline.The strength of the negative relationship between previous August temperature and the ring width series increased in recent decades and became significant when the calibration interval ended in the 1970s.In con-trast,previous October temperature was only sporadically significantly related to growth.At the tree line,July and previous November temperatures and precipitation in cur-rent January showed a temporarily significant negative and direct relationship to radial growth.Regression estimates of previous November temperatures on ring width decreased strongly during recent decades.Over the whole period (1901–1999)these climate variables did not significantly influence radial growth at the tree line.Residual ring width series of stands with mean age [100years were plotted in Fig.6a with mean July tem-perature after a z -transformation and after smoothing by 11-year running averages.Low-frequency variability of temperature and radial tree growth within the timberline ecotone deviates less than one SD throughout most of the time period compared.However,at the beginning of the last century and in the late 1980s,July temperature and tree growth curves strikingly diverge by [2SD units (Fig.6b).Annual increments of young stands (ca.50years)attheFig.2Total ring widthchronologies and sample depth (=number of trees included in chronologies)of Pinus cembra stands selected at timberline and tree line.Period of divergent trend in radial growth and July temperature since the mid-1980s and annual increments in 2003of ca.50-year-old stands are emphasized by a hatched box and filled circles ,respectivelytimberline and at the tree line show a comparable growth response during last decades(see Fig.2).DiscussionRecently,Bu¨ntgen et al.(2005)reconstructed alpine sum-mer temperatures back to AD951by including P.cembra ring width series in a multi-species Alpine tree-ring net-work.Applying split calibration and verification periods (1864–1933and1934–2002),they found no indications of a temporal shift in climate–growth relationship.Analysis of MRF of ring width series developed within the timberline ecotone of the Central Austrian Alps also revealed that radial growth response of P.cembra to July temperature was long-term stable throughout the last ca.150years. However,we detected a divergent trend in response between radial tree-growth of P.cembra at the timberline and at the tree line to July temperature since the mid-1980s. In addition,we miss an expected growth response to the extraordinary hot summer in2003(cf.Bu¨ntgen et al. 2006a,b).Weak growth responses in2003(\10%increase in annual increments with respect to2002)were found in ring width chronologies of ca.50-year-old Norway spruce stands[P.abies(L.)Karst.]from the timberline and tree line within the study area(Fig.2)and at two P.cembra stands with mean age of ca.150years from timberline sites (ca.1,950m a.s.l.)in the Eastern Central Alps(Staller Sattel,Italy)and Dolomites(Olang,Italy;data not shown). In Siberia,Vaganov et al.(1999)found that changing cli-mate sensitivity of high-latitude or high-altitude tree growth since the1950s was linked to delayed snow melt due to an increasing winter precipitation trend.Other explanations suggested for the observed change in tem-perature sensitivity of Northern Hemisphere tree growth are,e.g.,growth limiting effects of enhanced ultra violet radiation(UV-B)as a consequence of falling concentra-tions of stratospheric ozone Briffa et al.(2004)or temperature-induced drought stress(Barber et al.2000; Wilmking et al.2004;Bu¨ntgen et al.2006a).Additionally, nonlinearity in the climate–growth response of timberline trees to climate warming has to be considered(Fritts1976; Carrer et al.1998;Wilmking et al.2004;for a review see D’Arrigo et al.2007).Although a decreasing trend in summer precipitation is not obvious within the study area in recent decades(Wieser 2004),the divergence of radial growth and July temperature since the mid-1980s might be due to the impact of tempo-rary drought during the growing season on radial tree growth.In addition,carry-over effects from previous year(s),e.g.due to restricted root growth and/or storage of reserve substances,may also be considered.This is further supported by significant negative relationships between previous August temperature and annual increments of ca. 100-year-old trees at the timberline during last decades. Generally,leaf gas exchange studies revealed that at tim-berline in the Alps the growing season moisture regime is quite favourable to photosynthesis and hence regarded to be of minor importance for limiting tree growth(Tranquillini 1979;Wieser and Tausz2007).However,Anfodillo etal.(1998)reported that(i)soils at the timberline could become physiologically dry during the growing period and(ii)that high temperatures and vapour pressure deficits have a negative effect on the radial growth of P.cembra.Also,soil water content and summer temperature are correlated,since temperature influences evapotranspiration.These indica-tions suggest that temporary mild soil water stress may reduce radial growth of P.cembra and might be responsible for missing adequate response to temperature detected in this study.Since radial growth of P.cembra stands situated within inner alpine regions is also strongly controlled by envi-ronmental conditions prevailing prior to and during winter (Oberhuber2004),Pfeifer et al.(2005)suggested that within the study area synergistic effects of several growth limiting climate factors, e.g.cold autumn,low winter precipitation and drought during the growing season might be the trigger for radial growth depressions that are not reflected in records of July temperature.The fact that radial stem increment of P.cembra does not follow the trend in air temperature during some periods was also reported by Paulsen et al.(2000).One of the limitations of using monthly temperature and precipitation data in analysing climate–growth relationships is that short-term,extreme climatic events are not well represented.Stressful events such as drought,early or late frosts,and temperature fluctuations often occur over a period of only several days or weeks,but might substantially affect the physiological behaviour of trees and hence may also cause abrupt growth reductions(Innes1994;Graumlich and Brubaker1995; Neuwirth et al.2003).Since the combined influence of various unfavourable weather factors is not necessarily linear,synergistic impacts of growth limiting climate variables might be responsible for decreased sensitivity to temperature since mid-1980s.A nonlinear growth response to warming and the exis-tence of a temperature threshold was suggested by Wilmking et al.(2004)for white spruce(Picea glauca (Moench(Voss))at tree line in Alaska.This might also be valid for P.cembra,as supported by the only moderate increases in2003(Fig.2),when the long-term mean summer temperature was exceeded by ca.4°C(Fig.1). However,July temperature in2003was just ca.1.5°C above long-term mean,but is the climate factor most highly correlated to tree growth within the study area.This might also explain the weak growth response to the2003 summer heat-wave.In addition,an increase in whole plant respiration for cellular maintenance and active transport mechanisms in response to higher temperatures might be involved(Atkin and Tjoelker2003).On the other hand, evidence for shortening of the growing period due to an increasing trend of winter precipitation associated with delayed snow melt is not obvious from snow depths records gathered within the study area.In contrast,there are numerous studies which have demonstrated a lengthening of the growing season in Europe due to climate warming (e.g.,Menzel and Fabian1999;Walther et al.2002;Menzel et al.2006).Wieser(2004)reported that within the study area on Mt.Patscherkofel the growing season extended from168±12days during the period1972to1985to 196±23days during the years1994to2004.Climate–growth response patterns denote the influence of additional climate variables besides July temperature on radial increment growth of P.cembra.While climate conditions during the previous year(direct influence of October temperature)have a major impact on current year radial growth by influencing carbon storage,root growth, sensitivity against winter stress,and water supply(Wardle 1971;Baig and Tranquillini1980;Kozlowski and Pallardy 1997),current year climate conditions during winter (inverse relationship to March temperature)are related to effects of frost desiccation on tree growth(Tranquillini 1963;Hadley and Smith1983).MRF analysis,however, revealed long-term variability of these climate variables, which is especially pronounced in the second half of the twentieth century.This lack of temporal stability could primarily be not only due to changes in temperature and/or precipitation patterns but also due to changes in frequency and intensity of‘‘Foehn’’conditions,i.e.occurrence of strong,warm and dry southerly winds.Wind exposure of P. cembra is known to influence water relations and growth processes throughout the year(Grace1977;Kronfuss and Havranek1999).ConclusionAlthough tree-ring records developed within the timberline ecotone on Mt.Patscherkofel show a consistent relation-ship between annual increments of P.cembra and July temperature over at least the past100years,our data indicate that short-term climate extremes and/or the pres-ence of temperature thresholds may have been important factors limiting radial growth in recent decades.However, since Wilson and Topham(2004),Frank and Esper(2005b) and Bu¨ntgen et al.(2006b)found no recent decrease in summer temperature sensitivity of stands located at tim-berlines in the Alps,the degree to which geographical and species-specific limitations apply,requires further investigation.Acknowledgments This work was supported by the Austrian Sci-entific Fonds(P14554-BOT‘‘Variability of the growth–climate relationship of Cembra pine(P.cembra L.)at the alpine timberline ecotone’’and P18819-B03‘‘Temperature dependence of P.cembra (L.)stem growth and respiration along an altitudinal transect’’).We also thank Hypo–Tirol Bank,Innsbruck,and Swarovski,Wattens,for financial support.Climate data were provided by‘‘Zentralanstalt fu¨r。