沈阳二中2013——2014学年度上学期10月份
阶段验收高三（14届）英语试题
命题人：孙欣常虹审校人：常虹
说明：1、测试时间120分钟总分：150分
2、客观题涂在答题卡上，主观题答在答题纸上
第一卷（三部分，共115分）
第一部分听力（共两节，满分30分）
回答听力部分时，请先将答案标在试卷上，听力部分结束前，你将有两分钟的时间将你的答案转涂到客观答题卡上。
第一节（共5小题：每小题1.5分，满分7.5分）
听下面5段对话。每段对话后有一个小题，从题中所给的ABC三个选项中选出最佳选项，并标在试卷的相应位置。听完每段对话后，你有10秒钟的时间来回答有关小题和阅读下一小题。每段对话仅读一遍。
1.What will the man most probably do next?
A.Go to buy some cookies.
B.Go to borrow some cookies.
C.Go to get some cookies from the kitchen.
2.How do the two speakers probably go to the cinema?
A.On foot.
B.By taxi.
C.By car.
3.Where does this conversation most probably take place?
A.In a department store.
B.In a school.
C.In a restaurant.
4.Where does the conversation most probably take place?
A.In a street.
B.In a taxi.
C.On a bus.
5.What place is the woman most probably taking the child to?
A. A theme park.
B. A zoo.
C. A cinema.
第二节(共15小题;每小题1.5分，满分22.5分)
听下面5段对话或独白。每段对话或独白后有几个小问题，从题中所给的A、B、C、三个选项中选出最佳选项，并标在试卷的相应位置，听每段对话或独白前，你将有时间阅读各小题，每小题5秒钟；听完后，各小题给出5秒钟的作答时间。每段对话或独白读两遍。
听第6段材料，回答第6、7题。
6.What is Martin doing in Toronto?
A.Going on a business trip.
B.Taking part in a reunion.
C.Visiting a former classmate.
7.How longer will Martin stay in Toronto?
A. A week.
B.Three days.
C.Ten days.
听第7段材料，回答第8至10题。
8.What day is it today?
A.Wednesday.
B.Thursday.
C.Friday.
9.What does the girl want to do?
A.Go to a friend’s party.
B.Design a party for a friend.
C.Celebrate her birthday with her friends.
10.What does the girl promise to do?
A.Help with the cleaning after the party.
B.Clean the house before the party.
C.Go to buy some food.
听第8段材料，回答第11至13题。
11.How old is the woman’s son now?
A.10.
B.16.
C.22.
12.Why does the woman want to sell the house?
A.Because she needs money for her son’s college fees.
B.Because her family is moving to another country.
C.Because she has bought a better house nearby.
13.What does the man decide to do?
A.Buy a cheaper house.
B.Buy the house at once.
C.Ask his wife to have a look.
听第9段材料，回答第14至17题。
14.What is the woman’s mother probably doing?
A.Eating.
B.Working.
C.Shopping.
15.Why does the man visit the girl’s home?
A.To explain why he didn’t answer the phone.
B.To talk about some matters with the girl’s father.
C.To ask the girl about her college studies.
16.What did May probably major in at college?
https://www.doczj.com/doc/1610084330.html,w.
https://www.doczj.com/doc/1610084330.html,puter.
C.Medicine.
17.When will the girl’s mother come back home?
A.At about 9:00 am.
B.At about 8:30 pm.
C.At about 9:00 pm.
听第10段材料，回答第18至20题。
18.When will they set out?
A.At 7:30 am.
B.At 8:00 am.
C.At 8:45 am.
19.Who is the speaker?
A. A student of that school.
B. A teacher of that school.
C. A tour guide.
20.How many students will go there?
A.40.
B.50.
C.60.
第二部分英语知识运用（共两节满分45分）
第一节单项填空（共15小题；每小题1分，满分15分）
从A、B、C、D四个选项中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。
21. —Have you got everything ready for _______ concert?
—Yes, all is in _______ place.
A. the; the
B. a; the
C. a; 不填
D. the; 不填
22. _______ by the growing interest in nature, more and more people enjoy outdoor sports.
A. Influenced
B. Influencing
C. Having influenced
D. To be influenced
23. My headache _______ me. I thought it was going away, but it is getting worse and worse.
A. kills
B. is killing
C. was killing
D. killed
24. —Have you got used to the Chinese food, Robert?
—Yes, but I don't like _______ when a Chinese host keeps serving me the food I don't like.
A. this
B. that
C. those
D. it
25. That car accident _______ all his life. After that he was limited to a wheelchair.
A. damaged
B. injured
C. harmed
D. ruined
26. American Thanksgiving Day, _______ falls on Nov. 24 this year, takes on an entirely different look in China.
A. that
B. when
C. which
D. what
27. We tried to ring you back, Bryan, but we think we _______ your number incorrectly.
A. looked up
B. got through
C. took down
D. worked out
28. Frank put the medicine in the top drawer to make sure it would not be _______ to the kids．
A. accessible
B. relative
C. acceptable
D. sensitive
29. —What do you think of chemistry?
—In my opinion，chemistry is _______ physics.
A. a subject so difficult as
B. as difficult a subject as
C. as a difficult subject as
D. difficult as a subject as
30. —Where have you been ?
— I _______ in the heavy traffic .Otherwise I _______ here earlier.
A. have stuck; would have come
B. got stuck; was
C. got stuck ; would have come
D. had stuck ; would come
31. The new plan has been put forward _______ we will move to the new campus next term.
A. as
B. while
C. when
D. that
32. It is too bad for someone in such a high _______ in the government to behave badly in public.
A. position
B. situation
C. profession
D. condition
33. His diet can not be considered as healthy because it contains a lot of fat _______ meat, cakes and cream.
A. in terms of
B. in need of
C. in the form of
D. in favor of
34. The little girl showed no anxiety before the competition．She seemed _______ for it pretty well.
A. to prepare
B. to have prepared
C. having prepared
D. to be preparing
35. —I failed to finish the assignment on time．Sorry to let you down．
—? I have given you enough time.
A. So what
B. How come
C. Who cares
D. Why not
第二节完形填空（共20小题；每小题1.5分，满分30分）
阅读下面短文，从短文后各题所给的四个选项（A、B、C、D）中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。
Travis laughed as he tore at the wrapping paper on his birthday present. He was so 36 ! Finally, he would have the coolest pair of name-brand basketball shoes.
All the guys on his team were wearing the name-brand shoes of a popular basketball 37 , Chuck Hart. 38 Hart was criticized for his poor sportsmanship and infamous 39 , he was a great player. In fact, Travis wasn't thinking about Hart' s behavior; he had only expected to see Hart’s40 on the side of the box. The first indication that something was 41 came as he tore away the last piece of paper. Not Hart’s. The new shoes were the name-brand of another player, Robert Ryann, who was 42 for his amazing work in the community.
Travis’s hands 43 ; his heart stopped. It wasn't that the Ryann shoes weren’t nice, but what would his friends think ?
They were the wrong shoes and Travis would be 44 by the other players. When he looked up into his dad' s eyes, however, Travis decided he 45 not tell him. "'Thanks, Dad. I was really hoping for shoes," Travis said as he pulled the shoes out of the box.
Next morning his dad drove him to school. When they 46 in front of his destination, Travis slowly opened the car door. Just then, his dad stopped him.
“Hey, Travis, wait a minute, look…” his dad said 47 ,“Travis, I know those aren’t the shoes you had hoped for, but I saw the names of the two guys and made a（n）48 . The guy whose name is on those shoes,” he said, pointing down at Travis’s feet, “is someone I 49 . Do you know how often Ryann has found himself in 50 ?”
“No,” Travis said.
“Never. He’s never talked back to his coach or started a fight, and he’s a team player. You could have acted like a (n) 51 when you didn’t get the shoes you wanted, Travis, 52 you were polite and made the best of it. You have such a good 53 , like the guy whose name is on these shoes. I’m hoping that someday, your name will be on the coolest pair of shoes I’ll ever see.”
When Travis looked down at his feet, he saw the shoes 54 . His dad had used his mind and heart to give the son a thoughtful 55 .
36．A．surprised B．ashamed C．excited D．worried 37．A．team B．player C．coach D．game 38．A．Unless B．If C．Because D．Although
39．A．skill B．performance C．behavior D．action 40．A．name B．photo C．sign D．model 41．A．strange B．wrong C．true D．funny 42．A．known B．encouraged C．adopted D．influenced 43．A．fell B．froze C．shook D．folded 44．A．questioned B．noticed C．teased D．attacked 45．A．can B．need C．would D．may 46．A．pulled up B．put up C．took up D．turned up 47．A．peacefully B．hesitantly C．delightedly D．naturally 48．A．choice B．effort C．comment D．mistake 49．A．believe B．miss C．admire D．remember 50．A．danger B．surprise C．sorrow D．trouble 51．A．teammate B．adult C．kid D．student 52．A．so B．and C．but D．or 53．A．quality B．courage C．dream D．belief 54．A．clearly B．carefully C．patiently D．differently 55．A．gift B．look C．hope D．lesson
第三部分阅读理解（共两节，满分40分）
第一节（共15题；每小题2分，满分30分）
阅读下列短文，从每题所给的四个选项（A、B、C和D）中选出最佳选项，并在答题卡上将该项涂黑。
A
The campaign is over. The celebrations have ended. And the work for US president-elect Barack Obama has begun.
The 47-year-old politician rose to the highest post because of his stand against the war in Iraq and his plans to fix a weak economy. But what will the first African-American president do for race relations?
Obama's victory appears to have given blacks and other minorities a true national role model. For years, many looked to athletes and musicians for inspiration. As Darius Turner, an African-American high school student in Los Angeles, told the Los Angeles Times, “Kobe doesn’t have to be everybody’s role model anymore. “
Recent polls (民意测验) also suggest that Obama’s victory has given Americans new optimism about race relations. For example, a USA Today poll found that two-thirds of Americans believe relations between bla cks and whites “will finally be worked out”. This is the most hopeful response since the question was first asked during the civil rights revolution in 1963.
However, it’s still too early to tell whether Obama’s presidency will begin to solve many of the social problems facing low-income black communities.
Although blacks make up only 13 percent of the US population, 55 percent of all prisoners are African-American. Such numbers can be blamed on a number of factors on America's racist past, a failure of government policy and the collapse of the family in black communities.
It is unlikely that Obama will be able to reverse such trends overnight. However, Bill Bank, an expert of African-American Studies, says that eventually young blacks need to find role models in their own communities. “That’s not Martin Luther King, and not Barack Obama ,” he told the Los Angeles Times. “It’s actually the people closest to them. Barack only has so much influence.”
In the opinion of black British politician Trevor Phillips, Obama's rise will contribute more to multiculturalism than to race relations in the US.
“When the G8 meets, the four most important people in the room will be the president of China, the prime minister of India, the prime minister of Japan and Barak Obam a,” he told London’s The Times newspaper. “It will be the first time we've seen that on our television screens. That will be a huge psychological change for both the white people and the colored one in the world.”
56. For years, before Obama is elected president of the US, ________________.
A. Kobe was the only role model for all the blacks
B. blacks could only find role models on the basketball court
C. people in America couldn't find role models in their real life
D. American blacks had no role model who was successful in political area
57. According to Bill Bank, __________________.
A. It’s better for young blacks to find role models in those who are close to them
B. young blacks should not be so much influenced by Obama
C. Obama is qualified and has enough influence to a role model.
D. Obama is not the proper role model for African-Americans
58. The underlined word “collapse” in the passage probably has the similar meaning with the word in which example?
A. The earthquake was the reason of the building’s collapse.
B. The collapse of law and order in that area caused hundreds to death.
C. She was taken to hospital after her collapse at work.
D. They are looking into the collapse of the bridge.
59. What will be the huge psychological shift Trevor mentioned at the end of the passage?
A. The other three leader all support Obama.
B. Obama is an African-American president.
C. None of the four leaders is white.
D. Most leaders are from Asia.
B
They wear the latest fashions with the most up-to-date accessories（配饰）. Yet these are not girls in their teens or twenties but women in their sixties and seventies. A generation which would once only wear old-fashioned clothes is now favoring the same high street looks worn by those half their age.
Professor Julia Twigg, a social policy expert, said, “Women over 75 are now shopping for clothes more frequently than they did when they were young in the 1960s. In the 1960s buying a coat for a woman was a serious matter. It was an expensive item that they would purchase only every three or four years —now you can pick one up at the supermarket whenever you wish to. Fashion is a lot cheaper and people get tired of things more quickly.”
Professor Twigg analyzed family expending（支出）data and found that while the percentage of spending on clothes and shoes by women had stayed around the same —about 5 or 6 percent of spending —the amount of clothes bought had risen sharply.
The professor said, “Clothes are now 70 percent cheaper than they were in the 1960s because of the huge expansion of production in the Far East. In the 1960s Leeds was the heart of the British fashion industry and that was where most of the clothes came from, but now almost all of our clothes are sourced elsewhere. Everyone is buying more clothes but in general we are not spending more money on them.”
Fashion designer Angela Barnard, who runs her own fashion business in London, said older women were much more affected by celebrity （名流）style than in previous years.
She said, "When people see stars such as Judi Dench and Helen Mirren looking attractive and fashionable in their sixties, they want to follow them. Older women are much more aware of celebrities. There's also the boom in TV programmes showing people how they can change their look, and many of my older customers do yoga to stay in shape well in their fifties. When I started my business a few years ago, my older customers tended to be very rich, but now they are what I would call ordinary women. My own mother is 61 and she wears the latest fashions in a way she would never have done ten years ago. "
60.Professor Twigg found that, compared with the 1960s, ____________________.
A.people spend 30% less than they did on clothes
B.the spending on clothes has increased by 5% or 6%
C.the price of clothes has generally fallen by 70%
D.the amount of clothes bought has risen by 5% or 6%
61.It can be concluded that old women tend to wear the latest fashions today mainly because _________.
A.they get tired of themselves more quickly
https://www.doczj.com/doc/1610084330.html, shows teach them how to stay in shape
C.they feel much younger now
D.clothes are much cheaper than before
62.What can we learn about old women in terms of fashion?
A.They are often ignored by fashion designers.
B.They are now more easily influenced by stars.
C.They are regarded as pioneers in the latest fashion.
D.They are more interested in clothes because of their old age.
63.Which is the best possible title of the passage?
A.Age Is No Barrier for Fashion Fans.
B.The More Fashionable, the Less Expensive.
C.Unexpected Changes in Fashion.
D.Boom of the British Fashion Industry.
64. What is the advantage of using Loot?
A. It has more offers from accommodation agencies than Renting.
B. It gives you personal information about other co-renters.
C. Their website is designed mainly for students.
D. There are some good bargains.
65. A good agent can help you_______.
A. know more people
B. find cheap accommodation
C. get the right accommodation quickly
D. get free information about most accommodations
66. The information passed on by word of mouth is important because_________.
A. it is better than that found through any other source
B. it helps you find some of the best housing never advertised
C. the final year students always offer better information
D. the landlords have little valuable information
67. Which of the following provides the most reliable information for students looking for accommodation?
A. University accommodation offices.
B. Family.
C. Noticeboards.
D. Property papers: Loot and Renting.
D
Sometimes you’ll hear people say that you can’t love others until you love yourself. Sometimes you’ll hear people say that you can’t expect someone else to love you until you love yourself. Either way, you’ve got to love yourself first and this can be tricky. Sure we all know that we’re the apple of our parents’ eyes, and that our Grandmas think we’re great talents and our Uncle Roberts think that we will go to the Olympics. But sometimes it’s a lot harder to think such nice thoughts about oursel ves. If you find that believing in yourself is a challenge, it is time you built a positive self-image and learn to love yourself.
Self-image is your own mind’s picture of yourself. This image includes the way you look, the way you act, the way you talk and the way you think. Interestingly, our self-images are often quite different from the images others hold about us. Unfortunately, most of these images are more negative than they should be. Thus changing the way you think about yourself is the key to changing your self-image and your whole world.
The best way to defeat a passive self-image is to step back and decide to stress your successes. That is, make a list if you need to, but write down all of the great things you do every day. Don’t allow doubts to occur in it.
It very well might be that you are experiencing a negative self-image because you can’t move past one flaw or weakness that you see about yourself. Well, roll up your sleeves and make a change of it as your primary task. If you think you’re sil ly because you aren’t good at math, find a tutor. If you think you’re weak because you can’t run a mile, get to the track and practice. If you think you’re dull because you don’t wear the latest trends, buy a few new clothes. But remember, just becaus e you think it doesn’t mean it’s true.
The best way to get rid of a negative self-image is to realize that your image is far from objective, and to actively convince yourself of your positive qualities. Changing the way you think and working on those you need to improve will go a long way towards promoting a positive self-image. When you can pat（拍）yourself on the back, you’ll know you’ re well on your way. Good luck!
69. How should you change your self-image according to the passage?
A. To keep a different image of others.
B. To make your life successful.
C. To understand your own world.
D. To change the way you think.
70. Who are the intended readers of the passage?
A. Parents.
B. Teenagers.
C. Educators.
D. People in general.
第二节（共5小题；每小题2分，满分10分）
根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
Beginning college is exciting: new ideas to explore, new challenges to be met and many
decisions to be made; your future begins here.
________71______Many of us can be easily overwhelmed by the details of running a well-balanced life. While some of us may have the know-how, I guess there are more of us who can benefit from learning about the experiences of others who have walked the college halls before you.
The following you may find of use about life on campus:
●Plan well. There are so many new things to do at a new college or university. Give yourself time to make new friends and became familiar with the campus, but don’t forget why you are there. ________72______
●Don’t miss the guidelines. The restrictions, rules and regulations of all kinds can usually be found in your student’s handbook. ________73______What dates are important? What pieces of paper need to be handed in? What can / can’t you do in your student residence（住处）? Who has the right for what? What do you need to complete to graduate?
●________74______ And maybe it will better help to write it on a piece of paper and stick it on the telephone, TV and the kitchen table. Consider this —you are paying thousands of dollars for your course. You pay every time you have to repeat or replace a course.
●Build your identity. This is the time for you to decide what to do and what not to do. Take as much time as you need to explore new ideas. Do not be afraid of the beyond. ________75______
A. If you don’t have a “system” for planning your time now (like a day timer a computer data book), get one.
B. Give some time for social activities and manage your time wisely.
C. Write the word “STUDY”on the walls of our bedroom and bathroom.
D. You must keep the word “STUDY” in your mind because you are a student.
E. However, you will find college life is different from your previous school environment.
F. This is learning to make good choices.
G. Consider them well-balanced food for thought.
第二卷（35分）
第一节短文改错(共10小题；每小题1分，满分10分)
假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。错误涉及一个单词的增加、删除或修改。
增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词。
删除：把多余的词用斜线（\）划掉。
修改：在错的词下划一横线，并在该词下面写出修改后的词。
注意：1. 每处错误及其修改仅限一词；
2. 只允许修改10处，多者（从第11处起）不计分。
第二节书面表达（满分25分）
假定你是李华，是2013年佛罗里达冬令营的组织者，请你给对这项活动感兴趣的Joe回一封电子邮件，介绍冬令营的相关情况。
内容主要包括：
1．时间：2013年1月27日至2月13日
2．活动内容（英语课程、与接待家庭度周末、参观迪士尼乐园等）
3．预期收获（语言、文化等）
注意：
1．词数100左右；
2．可以适当增加细节，以使行文连贯；
3．开头和结尾已为你写好，不计入总词数。
参考词汇：佛罗里达冬令营Florida Winter Camp
迪士尼乐园Disneyland
Dear Joe,
Thanks for your mail. _________________________________________________________
_______________________________________________________________________________
_______________________________________________________________________________
Yours truly,
Li Hua
沈阳二中2013——2014学年度上学期10月份
阶段验收高三（14届）英语试题答案
听力：1-5 CAACB 6-10 ABACA 11-15 BBCCB 16-20 ACBAC
单选：21-25 DABDD 26-30 CCABC 31-35 DACBB
完形：36-40 CBDCA 41-45 BABCC 46-50 ABACD 51-55 CCADA
阅读理解：56—59：DABC 60—63: CDBA 64—67:DCBA 68—70: CDD
七选五：71—75：EBGCF
短文改错：
Today we are having a farewell party∧ honor our friend Peter. He is going back to my
to his homeland before the New Year. In the past year Peter and all of us have been on well terms. Also
good
we have helped each other and become good friend. Thank you Peter for be a part of this class!
friends being
We have a better atmosphere of English learning or we have become more interested in English
so
and made a great progress. We really appreciated your help.
appreciate
Dear Peter, we will miss you. Expect you to come back on some day. May you have a pleased
pleasant journey home!
书面表达参考例文：
One possible version
Dear Joe,
Thanks for your mail. I’m glad to know you are interested i n the 2013 Florida Winter Camp. It will be held from January 27 to February 13, during which time you will get wonderful experiences. You will have chances to improve your spoken English in the courses provided. Also, activities are arranged for you to spend weekends together with your host family, so you can learn American English in authentic situations. Besides, a trip to the local Disneyland will certainly add to the fun of the camp. Join the camp and you will have a better knowledge of American culture and life. You are sure to benefit from it.
Yours truly,
Li Hua
2019年普通高等学校招生全国统一考试（全国卷I） 英语 注意事项： 1．答卷前，考生务必将自己的姓名、准考证号填写在答题卡和试卷指定位置上。 2．回答选择题时，选出每小题答案后，用铅笔把答题卡上对应题目的答案标号涂黑。如需改动，用橡皮擦干净后，再选涂其他答案标号。回答非选择题时，将答案写在答题卡上，写在本试卷上无效。 3．考试结束后，将本试卷和答题卡一并交回。 第一部分听力（共两节，满分30分） 做题时，先将答案标在试卷上。录音内容结束后，你将有两分钟的时间将试卷上的答案转涂到答题卡上。 第一节（共5小题；每小题1.5分，满分7.5分） 听下面5段对话。每段对话后有一个小题，从题中所给的A、B、C三个选项中选出最佳选项。听完每段对话后，你都有10秒钟的时间来回答有关小题和阅读下一小题。每段对话仅读一遍。 例：How much is the shirt? A. ￡19.15. B. ￡9.18. C. ￡9.15. 答案是C。 1. Where does this conversation take place? A. In a classroom. B. In a hospital. C. In a museum. 2. What does Jack want to do? A. Take fitness classes. B. Buy a pair of gym shoes. C. Change his work schedule. 3. What are the speakers talking about? A. What to drink. B. Where to meet. C. When to leave. 4. What is the relationship between the speakers? A. Colleagues. B. Classmates. C. Strangers. 5. Why is Emily mentioned in the conversation? A. She might want a ticket. B. She is looking for the man. C. She has an extra ticket. 第二节（共15小题；每小题1.5分，满分22.5分） 听下面5段对话或独白。每段对话或独白后有几个小题，从题中所给的A、B、C三个选项中选出最佳选
2008辽宁高考英语试卷分析 2008 高考英语辽宁卷，体现了英语考试大纲的要求，即突出了语言交际能力的测试，高考试卷整体难度平稳，无偏、难、怪题。试题难度与2007年持平。延续了2007年的模式，突出了新考纲的要求。注重基础知识，强化知识的运用。综合性较强，对高中英语教学起到了良好的导向作用。 一、单项选择： 在15道选择题中，考查知识比较全面。突出了在语境中基本语法知识的运用。考查中心仍然是基础知识和基本能力。同时，又重视应用，不是死板和孤立的考查某一内容。题目的选择难度适中，重点突出。充分表明英语大纲的重点。考点如下：情景交际：21，34，情态动词、动词时态、动词短语、非谓语动词 22，23，29，25，31，27，冠词24，代词26，连词28，32，形容词30，名介33，倒装35，从上面不难看出，动词的用法是单项填空考查的重点。 e.g. 22, Peter _____ be really difficult at times even though he’s a nice person in general. A, shall B. should C. can D. must 答案： C 这是一个情态动词的考查。近几年高考，考查情态动词侧重在表示推测的用法及情态动词＋ have done , （2007 辽宁） ―― Turn off the TV, Jack.____ your homework now?
―― Mum, just ten more minutes, please. A. should you be doing B. Shouldn’t you be doing C. couldn't you be doing D. will you be doing 答案：B 23 We first met on a train in 2000. We both felt immediately that we _______ each other for years. A. knew B. have known C. had known D. known 答案：C 29．―― Have you got any job offers? ―― No, I ______. A. waited B. had been waiting C. have waited D. am waiting 答案：D 31. Please remain ____; the winner of the prize will be announced soon. A. seating B. seated C. to seat D, to be seated 答案：B 从上几道题可以看出，每道题所给的备选答案都是相同的动词，但是是以不同的动词形式出现。这样的题，考查点不是动词的时态、语态就是动词的非谓语形式，这时我们应把思维点转移到语法上，根据句意去选择最佳答案。
2020-2021学年辽宁沈阳二中高二上期12月月考物理卷（解析版）姓名:_____________ 年级:____________ 学号:______________ 题型选择题填空题解答题判断题计算题附加题总分 得分 1. （知识点：动能定理,电荷在匀强磁场中运动） 如图所示为一种获得高能粒子的装置.环行区域内存在垂直纸面向外、大小可调节 的匀强磁场，质量为m、电量为＋q的粒子在环中作半径为R的圆周运动.A、B为两块中心开有小孔的极板.原来电势都为零，每当粒子飞经A板时，A板电势升高为＋U，B板电势仍保持为零，粒子在两板间电场中得到加速.每当粒子离开B板时，A板电势又降为零.粒子在电场一次次加速下动能不断增大，而绕行半径不变. ⑴设t=0时粒子静止在A板小孔处，在电场作用下加速，并绕行第一圈.求粒子绕行n圈回到A板时获得的总动能En ⑵为使粒子始终保持在半径为R的圆轨道上运动，磁场必须周期性递增.求粒子绕行第n圈时的磁感应强度Bn ⑶求粒子绕行n圈所需的总时间tn(粒子过A、B板间的时间忽略) 【答案】 （1）nqU；（2）（3） 【解析】 试题分析：(1)粒子绕行一周电场力做功为W=qU，获得的动能为qU 绕行n圈回到A板时获得的总动能为En=nqU 评卷人得分
(2)在第n圈时，又，可解得 (3)粒子运动的周期， 粒子绕行n圈所需的总时间为： 考点：带电粒子在磁场中的运动. 如图所示，平行金属导轨与水平面间夹角均为θ=370，导轨间距为lm，电阻不计，导轨足够长。两根金属棒ab和a’b’的质量都是0.2kg，电阻都是1Ω，与导轨垂直放置且接触良好，金属棒和导轨之间的动摩擦因数为0.25，两个导轨平面处均存在着垂直轨道平面向上的匀强磁场(图中未画出)，磁感应强度B的大小相同。让a’b’固定不动，将金属棒ab由静止释放，当ab下滑速度达到稳定时，整个回路消耗的电功率为8W。求： ⑴ab达到的最大速度多大？ ⑵ab下落了30m高度时，其下滑速度已经达到稳定，则此过程中回路电流的发热量Q多大？ ⑶如果将ab与a’b’同时由静止释放，当ab下落了30m高度时，其下滑速度也已经达到稳定，则此过程中回路电流的发热量Q’为多大？(g=10m/s2，sin370=0.6，cos370=0.8) 【答案】 （1）10m/s；（2）30J；（3）75J 【解析】 试题分析：：(1)ab棒相当于电源，当其下滑速度最大时有：①
2014 辽宁高考英语卷 第二部分阅读理解 第一节（共15小题；每小题 2分，满分30分） 阅读下列短文，从每题所给的四个选项中（A,B,C,D）中，选出最佳选项，并在答题纸上将该项涂黑。 A A new study shows students who write notes by hand during lectures perform better on exams than those who use laptops. Students are increasingly using laptops for note-taking because of speed and legibility. But the research has found laptop users are less able to remember and apply the concepts they have been taught. Researchers performed experiments that aimed to find out whether using a laptop increased th e tendency to make notes ”mindlessly” by taking down word for word what the professors said. In the first experiment, students were given either a laptop or pen and paper. They listened to the same lectures and were examined on their ability and to remember facts and on how well they understood concept. The researchers found that laptop users took twice as many notes as those wrote by hand. However, the type is performed worse at remembering and applying the concepts. Both groups scored similarly when it comes to memorizing facts. The researchers’ report said, “ While more notes are beneficial, if the notes are taken mindlessly, as is more likely the case on a laptop, the benefit disappears. In another experiment aimed at testing long-term memory, students took notes as before but were tested a week after the lecture. This time, the students who wrote notes by hand performed significantly better on the exam. These two experiments suggest that handwritten notes are not only better for immediate learning and understanding, but that they also lead to superior revision in the future. 21. More and more students favor laptops for note-taking because they can___. A write more notes B digest concepts better C get higher scores D understand lectures better 22. While taking notes, laptops users tend to be___. A skillful B mindless C thoughtful D tireless 23. The author of the passage aims to ___. A examine the importance of long-term memory B stress the benefit of taking notes by hand C explain the process of taking notes D promote the use of laptops. 24. The passage is likely to appear in ___. A a newspaper advertisement B a computer textbook C a science magazine D a finance report
沈阳二中2021－２0２2年下学期第一次模拟考试 高三(16届）理科综合试题 命题人: 高三理科综合组审校人：高三理科综合组 说明:１.测试时间:1５0分钟总分:300分 2.客观题涂在答题纸上，主观题答在答题纸的相应位置上 3.可能用到的相对原子质量：Fe ５6；Cr 52;Nａ23；S ３2；O １6; 第Ⅰ卷 一、选择题：本大题共１3小题,每小题6分。在每小题给出的四个选项中，只有一项是符 合题目要求的。 二、选择题:本题共8小题，每小题６分。在每小题给出的四个选项中,第１4～１８题只有一项符合题目要求,第19~21题有多项符合题目要求。全部选对的得6分,选对但不全的得3分，有选错的得0分。 14．跳台滑雪是勇敢者的运动,它是利用山势特点建造的一个特殊跳台。一运动员穿着专用滑雪板,不带雪杖,在助滑路上获得高速后从A点水平飞出,在空中飞行一段距离后在山坡上Ｂ点着陆,如图所示。已知可视为质点的运动员水平飞出 的速度v0＝２0ｍ／s,山坡看成倾角为37°的斜面,不考虑空气 阻力，则运动员(g=１0m/s２,sin３70=0．6，cos370=０.8) Ａ．在空中飞行的时间为4s B．在空中飞行的时间为３s C．在空中飞行的平均速度为2０m／s D.在空中飞行的平均速度为５0m/ｓ 1５．如图所示，一同学在水平桌面上将三个形状不规则的石
块成功叠放在一起,保持平衡。下列说法正确的是 A ．石块b 对ａ的支持力与a 受到的重力是一对相互作用力 Ｂ.石块b 对a 的支持力一定等于a 受到的重力 C.石块ｃ受到水平桌面向左的摩擦力 D.石块c 对b 的作用力一定竖直向上 １6.如图,一宇宙飞船在轨道半径为R 的近地圆轨道Ⅰ上围绕地球运行，经变轨后进入椭圆轨道Ⅱ运行。已知椭圆轨道的远地点到地球球心的距离为3.5R ，下列说法正确的是 A ．飞船在轨道Ⅱ运行周期比在轨道Ⅰ运行周期小 Ｂ.飞船在椭圆轨道远地点的速率是近地点的3．5倍 Ｃ．飞船从轨道Ⅰ变轨进入到轨道Ⅱ的过程中机械能变大 D ．飞船从近地点向远地点运动的过程中机械能不断增大 17．一带正电的粒子仅在电场力作用下从A 点经B 、C 运动到D 点,其 “速度—时间”图象如图所示。分析图象后，下列说法正确的是 Ａ．A 处的电场强度大于Ｃ处的电场强度 Ｂ.B 、Ｄ两点的电场强度和电势一定都为零 C.粒子在A 处的电势能大于在C 处的电势能 D ．A 、C 两点的电势差大于B 、D 两点间的电势差 18.一长轻质木板置于光滑水平地面上,木板上放质量分别为m A ＝1kg 和ｍB =２kg 的A 、Ｂ两物块，A 、B 与木板之间的动摩擦因数都为μ=０．2，水平恒力Ｆ作用在A 物块上,如图所示（重力加速g=1０m ／s ２)。则 A.若F ＝1Ｎ，则物块、木板都静止不动 Ｂ.若F =1．５Ｎ,则A 物块所受摩擦力大小为1.５N Ｃ．若F =4Ｎ，则Ｂ物块所受摩擦力大小为4N D.若Ｆ＝8N ，则B 物块所受摩擦力大小为２N 19. 某小型水电站的电能输送示意图如图所示,发电机通过升压变压器T １和降压变压器Ｔ2向用户供电。已知输电线的总电阻为R=10Ω，降压变压器T 2原、副线圈匝数之比为4∶ 地球II I A B
2017年辽宁省沈阳市中考英语试卷 一、单项选择（共10 小题，每小题0.5 分，满分 5 分） 1．﹣﹣﹣These people are really nice． ﹣﹣﹣Yes，they ______ show respect for our feelings．（） A．seldom B．never C．always D．already 2．We had fun and learnt ______ new as well．We had a good time．（）A．something B．anything C．nothing D．everything． 3．______ 2000，this company has seen much new development．It has become one of the biggest companies in the country．（） A．For B．In C．By D．Since 4．______it is often cold in the mountains，you need to wear warm clothes．（）A．Though B．Unless C．As D．Until 5．Look on the bright side of life，and imagine that you ______ a happy and successful future．（） A．had B．will have C．have D．have had 6．These light bulbs look the same，but their ______ on the environment are different．（） A．solutions B．methods C．effects D．secrets 7．﹣﹣﹣What tools ______to make paper cutting？ ﹣﹣﹣Scissors．（） A．are used B．used C．will use D．use 8．It's hard to hold back the tears．This is ______thing I've ever heard．（）A．sad B．sadder C．saddest D．the saddest 9．﹣﹣﹣I'm worried about the air． ﹣﹣﹣______．There might be heavy pollution．（） A．Me too B．Never mind C．Of course D．Not yet 10．We're discussing why ______ for our health．（） A．are fast food bad B．fast foods are bad
2011年辽宁高考英语试题及答案 2011年普通高等学校招生全国统一考 试(辽宁卷) 英语 本试卷分第一卷(选择题)和第二卷(非选择题)两部分。考试结束后，将本试卷和答题卡一并交回。 第一卷 注意事项： 1.答第一卷前，考生务必将自己的姓名、准考证号填写在答题卡上。 2.选出每小题答案后，用铅笔把答题卡上对应题目的答案标号涂黑。如需改动，用橡皮擦干净后，再选涂其他答案标号。不能答在本试 卷上，否则无效。第一部分听力 (略) 第二部分英语知 识运用(共两节，满分45分) 第一节单项填空(共15小题;每小题1分，满分15分) 从A、B、C、D四个选项中，选出可以填入空白处的最佳选项， 并在 答题卡上将该项涂黑. 例: We last night, but we went to the concert instead, A. must have studied B. might study C. should have studied D. would study 21. If you __ go, at least wait until the storm is over. A. can B. may C. must D. will 22. What are you doing out of bed, Tom? You're to be asleep. , A. supposed B. known C. thought D. considered 23. Twenty students want to attend the class that aims to teach to read first. A. what B. who C. how D. why 24. You are old enough to your own living. A.win B. gain C. take D. earn 25. No matter how , it is not necessarily lifeless.
2013届省重点中学协作体领航高考预测试卷2 理科综合能力测试 第Ⅰ卷（选择题） 本卷共21题，每小题6分，共126分 一、选择题（本题共13小题，在每小题给出的四个选项中，只有一项是符合题目要求的。 1、下列有关蛋白质的说法，正确的是 （ ） A ．细胞中氨基酸种类和数量相同的蛋白质是同一种蛋白质 B ．垂体分泌的生长素能促进蛋白质的合成和骨的生长 C ．淀粉酶和蛋白酶是活细胞产生的具有催化活性的蛋白质 D ．蛋白质与双缩脲试剂的反应结果表明氨基酸中含有肽键 2、下丘脑中有体温调节中枢，正常人在寒冷环境中体温调节中枢兴奋，能引起( ) A ．产热量大于散热量 B ．皮肤冷觉感受器兴奋 C ．皮肤血管扩张汗液增多 D ．肾上腺素分泌增加 3 、二氧化碳等温室气体大量排放，引起全球气候变暖，对人类和其他生物的生存构成了严重威胁。下图一为科学家提供的大气中每月平均二氧化碳浓度图，图乙为碳元素在生态系统中循环的模式图，“甲、乙、丙”表示生态系统的生物成分，“箭头”表示生理过程。下列相关叙述中，正确的是( ) A ．图一所示CO2浓度逐渐升高，主要原因是植物破坏使CO2消耗少 B ．图二中c 过程代表光合作用，f 过程代表微生物的呼吸作用 C ．图二中甲所示的营养级在生态系统的食物链中占有的碳元素最多 D ．图二中丙所代表的生物其细胞内没有成形的细胞核 4、下列关于生殖细胞的叙述不正确的是（ ） A ．同一个生物体在不同时刻产生的精子或卵细胞，染色体数一般是相同的。 B ．同一个生物体在不同时刻产生的精子或卵细胞，染色体组成一般是不同的。 C ．一个卵细胞一般只能同一个精子结合，形成受精卵。 D ．受精卵所含DNA 数是精子或卵细胞的二倍。 5、如图所示，控制甲遗传病的基因A 和a 位于５号染色体上，； 控 制乙遗传病的基因Ｂ和b 位于21号染色体上。下列相关叙述合理的是（ ） A ．４号个体不携带致病基因的概率是１/6 B ．4号基因型与父亲相同的概率是２/９ Ｃ．１与２又生了一个正常女孩，与４号基因型相同的 概率是25/81 甲病女乙病女 １２３４５
辽宁省沈阳市2018年中考英语试题 试题满分100分，考试时间100分钟。 一、单项填空（共10小题，每小题0.5分，满分5分） 从A、B、C、D中选出可以填入空白处的最佳选项。 1.Small cars are useful in cities with narrow __________. A. streets B. cinemas C. squares D. shop 2. There will be fewer workers in factories because most work _________ by robots in the future. A. is done B. was done C .will be done D. will do 3. He ______look at the stars every night, but now he does not. A. had better B. used to C. ought to D. had to 4. Luke's mother will be _____him if he wins the reading competition. A. proud of B. tired of C. worried about D. strict with 5.---_______do you brush your teeth? ---Twice or more a day. A. How soon B. How far C. How long D. How often 6. Bob dislikes coffee, so he almost _________ drinks it. A. often B. always C. never D. ever 7. Sarah _________many places of interest in Beijing already. A. visited B. has visited C. will visit D. visits
辽宁省高考英语试题及答案 第Ⅰ卷 第一部分听力（共两节，满分30 分） 做题时，现将答案标在试卷上，录音内容结束后，你将有两分钟的时间将试卷上的答案转涂到答题卡上。 第一节（共5小题；每小题1.5分，满分7.5分） 听下面5段对话，每段对话后有一个小题。从题中所给的A、B、C三个选项中选出最佳选项，并标在试卷的相应位置。听完每段对话后，你都有10秒钟的时间来回答有关小题和阅读下一小题。每段对话仅读一遍。 例：How much is the shirt? A. ￡ 19. 15 B. ￡ 9. 18 C. ￡ 9. 15 答案是C。 1. What will Lucy do at 11:30 tomorrow? A. Go out for lunch. B. See her dentise. C. Visit a friend. 2. What is the weather like now? A. It’s sunny. B. It’s rainy. C. It’s cloudy. 3. Why does the man talk to Dr. Simpson? A. To make an apology. B. To ask for help. C. To discuss his studio 4. How will the woman get back from the railway station? A. By train. B. By car C. By bus. 5. What does Jenny decide to do first? A. Look for a job. B. Go on a trip. C. Get an assistant. 第二节（共15小题；每小题1.5分，满分22.5分） 听下面5段对话或独白。每段对话或独白后有几个小题，从题中所给的A、B、C三个
沈阳二中2019—2020学年度下学期高三第五次模拟考试 理科综合能力测试 命题人：高三理科综合审校人：高三理科综合 说明：1、测试时间：150分钟总分：300分 2、客观题答在答题纸上，主观题答在答题纸相应位置上 可能用到的相对原子质量：H: 1 B:11 C:12 N:14 O: 16 Na:23 Mg: 24 S:32 Ce:140 第Ⅰ卷（选择题，共126分） 一、选择题：本大题共13小题，每小题6分。在每小题给出的4个选项中，只有一项符合题目要求。 1.下列关于各种物质的描述，正确的是（） A.脂质存在于所有的细胞中 B.动物细胞通过自由扩散排出Na+ C.细胞癌变后，细胞膜上的糖蛋白增多 D.生命系统的结构层次包括从原子、分子到生物圈的各个层次 2.将同一部位的紫色洋葱外表皮细胞分别浸在甲、乙、丙3种溶液中，测得原生质层的外界面与细胞壁间距离变化如图所示，下列相关分析错误的是（） A．实验开始时，洋葱表皮细胞细胞液浓度均小于甲、乙溶液的浓度 B．与t0时相比，t2时乙溶液中洋葱表皮细胞的细胞液浓度未曾发生变化 C．实验过程中，丙溶液中有水分子进出洋葱表皮细胞 D．实验结束时，乙溶液的浓度可能有所下降 3.启动子是RNA聚合酶识别结合的位点，RNA聚合酶与启动子结合以后启动基因的转录。许多基因的启动子内富含CG重复序列，若其中的部分胞嘧啶(C)被甲基化成为5-甲基胞嘧啶，就会抑制基因的转录。下列与之相关的叙述中，正确的是（） A.在一条单链上相邻的C和G之间通过氢键连接 B.胞嘧啶甲基化导致已表达的蛋白质结构改变 C.基因的表达水平与基因的甲基化程度无关 D.胞嘧啶甲基化会阻碍RNA聚合酶与启动子结合 4．下列有关教材实验中使用的试剂和实验原理的叙述，正确的是（） A．低温诱导染色体数目加倍实验中，将大蒜根尖制成装片后再进行低温处理 B．盐酸在观察细胞有丝分裂和观察DNA和RNA在细胞中的分布实验中的作用相同 C．向某溶液中加入双缩脲试剂，出现紫色反应，说明该溶液中一定含有蛋白质 D．在提取纯净的动物细胞膜和植物细胞的质壁分离与复原实验中水的作用原理相近 5.在某草原上存在甲、乙和丙三种主要牧草，牛羊对牧草喜食程度甲>乙>丙，放牧强度越大，牧草地上生物量越小。牛羊对牧草的啃食造成的损伤能促进牧草产生和积累单宁类物质，使牧草的口感变差。下列叙述错误的是（）
2018年沈阳中考英语 一、单项填空（共10小题，每小题0.5分，满分5分）从A、B、C、D中选出可以填入空白处 的最佳选项 ( ) 1. Small cars are useful in cities with narrow_________________. A.streets B. cinemas C. squares D. shops ( ) 2. There will be fewer workers in factories because most work___________by robots in future. A.is done B. was done C. will be done D. will do ( ) 3. He ___________look at the stars every night, but now he does not. A.had better B. used to C. ought to D. had to ( ) 4. Luke’s mother will be ____________him if he wins the reading competition. A.proud of B. tired of C. worried about D. strict with ( ) 5 .---___________do you brush your teeth? --Twice or more a day. A.How soon B. How far C. How long D. How often ( ) 6.Bob dislikes coffee, so he almost ___________drinks it. A.often B. always C. never D. ever ( ) 7.Sarah ____________many places of interest in Beijing already. A.visited B. has visited C. will visit D. ever ( ) 8.My grandparents wrote letters to keep in touch with others__________they were young. A.when B.Since C.after D.before ( ) 9 --Tom , I went to the party yesterday evening.--Oh, I want to know___at the party. A. who do you meet B. who you meet C. who did you meet D. who you met ( ) 10. ---I don’t like the short story“The gifts”, I think it’s out of date. ----I’m sorry,but__________although it may be old ,I still think it’s a moving story. A. it doesn’t matter B .I don’t agree C. y ou’re welcome D. t hat’s all right 二、完形填空（共15小题，每小题1分，满分15分） 阅读短文，掌握其大意，然后人A、B、C、D中选出可以填入空白处的最佳选项。
姓名： ____________考号： __________班级： _________得分： 高考英语周考英语答题卡 1[ A ][ B ] 2[ A ][ B ] 3[ A ][ B ] 4[ A ][ B ] 5[ A ][ B ] 26[ A ][ B ] 27[ A ][ B ] 28[ A ][ B ] 29[ A ][ B ] 30[ A ][ B ] 41[ A ][ B ] 42[ A ][ B ] 43[ A ][ B ] 44[ A ][ B ] 45[ A ][ B ] [ C ] 6 [A][ B ][ C ]11[ A ][ B ][ C ]16[ A ][ B ][ C ]21[ A ][ B ][ C ][ D ] [ C ]7 [A][ B ][ C ]12[ A ][ B ][ C ]17[ A ][ B ][ C ]22[ A ][ B ][ C ][ D ] [ C ]8 [A][ B ][ C ]13[ A ][ B ][ C ]18[ A ][ B ][ C ]23[ A ][ B ][ C ][ D ] [ C ]9 [A][ B ][ C ]14[ A ][ B ][ C ]19[ A ][ B ][ C ]24[ A ][ B ][ C ][ D ] [ C ]10 [A][ B ][ C ]15[ A ][ B ][ C ]20[ A ][ B ][ C ]25[ A ][ B ][ C ][ D ] [ C ][ D ]31[ A ][ B ][ C ][ D ]36[ A ][ B ][ C ][ D ][ E ][ F ][ G ] [ C ][ D ]32[ A ][ B ][ C ][ D ]37[ A ][ B ][ C ][ D ][ E ][ F ][ G ] [ C ][ D ]33[ A ][ B ][ C ][ D ]38[ A ][ B ][ C ][ D ][ E ][ F ][ G] [ C ][ D ]34[ A ][ B ][ C ][ D ]39[ A ][ B ][ C ][ D ][ E ][ F ][ G ] [ C ][ D ]35[ A ][ B ][ C ][ D ]40[ A ][ B ][ C ][ D ][ E ][ F ][ G ] [ C ][ D ]46[ A ][ B ][ C ][ D ]51[ A ][ B ][ C ][ D ]56[ A ][ B ][ C ][ D ] [ C ][ D ]47[ A ][ B ][ C ][ D ]52[ A ][ B ][ C ][ D ]57[ A ][ B ][ C ][ D ] [ C ][ D ]48[ A ][ B ][ C ][ D ]53[ A ][ B ][ C ][ D ]58[ A ][ B ][ C ][ D ] [ C ][ D ]49[ A ][ B ][ C ][ D ]54[ A ][ B ][ C ][ D ]59[ A ][ B ][ C ][ D ] [ C ][ D ]50[ A ][ B ][ C ][ D ]55[ A ][ B ][ C ][ D ]60[ A ][ B ][ C ][ D ] 第二节：语法填空（15 分） 61.____________ 62. _____________ 63. ______________ 64. ________________ 65. ____________ 66._____________ 67. _____________68. _______________69. ________________ 70. ___________ 第一节：短文改错（10 分） As we all know, life is very much beautiful and precious; therefore we should admire but value it. We should make our life richly and meaningful by working hard. Only in that way can we carry out our duties in life. Furthermore, we should be braver enough to meet the challenges and manage to overcome the difficulties and sadness we meet in your life. By doing so, we can make greater progress in our field and enjoy our success and pleasure earning by ourselves. All in all, not only should we learn to enjoy the beauty of life now, but also we should learn how protect and fight against a more beautiful life in the future. 第 1页（共 2 页）
绝密★启用前 2018年普通高等学校招生全国统一考试（辽宁卷） 英语 （考试时间：120分钟试卷满分：150分） 注意事项： 1. 答卷前，考生务必将自己的姓名、准考证号填写在答题卡上。 2. 作答时，务必将答案写在答题卡上，写在本试卷及草稿纸上无效。 3. 考试结束后，将本试卷和答题卡一并交回。 第一部分听力（共两节，满分30分） 做题时，先将答案标在试卷上。录音内容结束后，你将有两分钟的时间将试卷上的答案转涂到答题卡上。 第一节（共5小题；每小题1.5分，满分7.5分） 听下面5短对话，每段对话后有一个小题，从题中给的A、B、C三个选项中选出最佳选项。听完每段对话后，你都有10秒钟的时间来回答有关小题和阅读下一小题。每段对话仅读一遍。 例：How much is the shirt？ A.￡19.15. B.￡9.18. C.￡9.15. 1.What does John find difficult in learning German？ A.Pronunciation. B.Vocabulary. C.Grammar. 2.What is the probable relationship between the speakers？ A.Colleagues. B.Brother and sister. C.Teacher and student. 3.Where does the conversation probably take place？ A. In a bank. B. At a ticket office. C. On a train. 4. What are the speakers talking about？ A.A restaurant. B.A street. C.A dish. 5.What does the woman think of her interview？
[限时训练] [限时45分钟，满分100分] 一、选择题(每小题6分，共60分) 1．如图所示，质量为m的跳高运动员先后用背越式和跨越式两种跳高方式跳过某一高度，该高度比他起跳时的重心高出h，则他从起跳后至越过横杆的过程中克服重力所做的功 A．都必须大于mgh B．都不一定大于mgh C．用背越式不一定大于mgh，用跨越式必须大于mgh D．用背越式必须大于mgh，用跨越式不一定大于mgh 解析用背越式跳高时，其重心升高的高度可小于h，但用跨越式跳高时，其重心升高的高度一定大于h，故C正确，A、B、D均错误． 答案 C 2．滑板是现在非常流行的一种运动，如图所示，一滑板运动员以7 m/s的初速度从曲面的A点下滑，运动到B点时速度仍为7 m/s，若他以6 m/s的初速度仍由A点下滑，则他运动到B点时的速度 A．大于6 m/s B．等于6 m/s C．小于6 m/s D．条件不足，无法计算 解析当初速度为7 m/s时，由功能关系知，运动员克服摩擦力做的功等于减少的重力势能．当初速度变为6 m/s时，运动员对轨道的压力变小，由F f＝μF N知运动员所受的摩擦力减小，故从A到B过程中克服摩擦力做的功减少，而重力势能变化量不变，故运动员在B点的动能大于他在A点的动能，A正确． 答案 A
3．如图所示，一轻弹簧的左端固定，右端与一小球相连，小球处于光滑水平面上．现对小球施加一个方向水平向右的恒力F，使小球从静止开始运动，则小球在向右运动的整个过程中 A．小球和弹簧组成的系统机械能守恒 B．小球和弹簧组成的系统机械能逐渐增大 C．小球的动能逐渐增大 D．小球的动能先增大然后减小 解析小球在向右运动的整个过程中，力F做正功，由功能关系知小球和弹簧组成的系统机械能逐渐增大，选项A错误、B正确；弹力一直增大，当弹力大小等于F时，小球的速度最大，动能最大，当弹力大于F时，小球开始做减速运动，速度减小，动能减小，选项C错误、D正确． 答案BD 4．如图所示，足够长的传送带以恒定速率顺时针运行，将一个物体轻轻放在传送带底端，第一阶段物体被加速到与传送带具有相同的速度，第二阶段与传送带相对静止，匀速运动到达传送带顶端．下列说法正确的是 A．第一阶段摩擦力对物体做正功，第二阶段摩擦力对物体不做功 B．第一阶段摩擦力对物体做的功等于第一阶段物体动能的增加 C．第一阶段物体和传送带间的摩擦生热等于第一阶段物体机械能的增加 D．物体从底端到顶端全过程机械能的增加等于全过程物体与传送带间的摩擦生热解析第一阶段为滑动摩擦力做功，第二阶段为静摩擦力做功，两个阶段摩擦力方向都跟物体运动方向相同，所以摩擦力都做正功，选项A错误；由功能关系可知，第一阶段摩擦力对物体做的功(除重力之外的力所做的功)等于物体机械能的增加，即ΔE＝W阻＝F阻 l物，摩擦生热为Q＝F阻l相时，又由于l传送带＝v t，l物＝v 2t，所以l物＝l相对＝ 1 2l传送带，即Q＝Δ E，选项C正确、B错误；第二阶段没有摩擦生热，但物体的机械能继续增加，结合选项C