2014-2015学年度山东省滕州市善国中学第二学期高一期末复习自查
英语试题
第Ⅰ卷（选择题，共50分）
第一部分：阅读理解（共两节，满分30分）
第一节（共10小题，每题2分，满分20分）阅读下列短文，从每题所给的A、B、C、D 四个选项中，选出最佳选项，并在答题卡上将该项涂黑。
阅读下列短文，从每题所给的A、B、C、D四个选项中，选出最佳选项，并在答题卡上将该项涂黑。
A
We lived in a very quiet neighborhood. One evening I heard a loud crash in the street. Earlier that evening my wife had asked me to go to the store to get some soft drinks. It seemed like this would be a good time to let my teenage daughter Holly practice her driving, so I sent her to the store in my truck.
At dinner my son talked about how much he liked my truck. I enjoyed having it, but I said: “Guy, my heart is not set on that truck. I like it but it is just metal and won’t last forever. Never set your heart on anything that won’t last.”
After h earing the loud noise, the whole family ran outside. My son shouted: “Dad! Dad, Holly crashed your truck.”
My heart sank and my mind was flooded with conflicting thoughts. Was anyone hurt? Who else was involved? As I ran to the door, I heard a voice in my heart say: “Here is a chance to show Holly what you really love. She’ll never forget it.”
The accident had occurred in my own driveway. Holly had crashed my truck into our other vehicle, the family van （搬运车）. In her inexperience, she had confused the brakes and the gas pedal. Holly was unhurt physically, but when I reached her, she was crying and saying: “Oh, Dad, I’m sorry. I know how much you love this truck.” I held her in my arms as she cried.
Later that week a friend stopped by and asked what had happened to my truck. I told her the whole story. Her eyes moistened （湿润）and she said: “That happened to me when I was a girl. I borrowed my dad’s car and ran into a log that had fallen across the road. I ruined the car. When I got home my Dad knocked me to the ground and began to kick me.” Over 40 years later, she still felt the pain of that night.
I remember how sad Holly was and how I comforted her. One day, when Holly thinks back on her life, I want her to know what really matters in my life.
1．How did the crash happen?
A．The van was parked in the wrong place that evening.
B．Holly stepped on the gas pedal instead of the brakes.
C．The brakes of the truck didn’t work properly.
D．Holly was too careless and young to drive a truck.
2．Why didn’t the w riter punish Holly?
A．He was so rich that he didn’t care about losing one truck.
B．He thought there was no point punishing her after the accident.
C．He believed the truck was made of metal and of poor quality.
D．He wanted Holly to know he loved her more than anything.
3．What does the underlined sentence mean?
A．She still suffered physical pain.
B．She felt sorry of damaging the car.
C．It left a deep wound on her heart.
D．She was not forgiven by her Dad.
B
Supermarkets are trying out new computers that make shopping carts more intelligent（具有智能的）．They will help shoppers find paper cups or toilet soap, and keep a record of the bill．The touch-screen devices （触摸屏装置）are on show at the Food Marketing Institute's exhibition here this week．"These devices are able to create value and get you around the store quicker, "said Michael Alexander, manager of Springboard Retail Networks Inc, which makes a smart cart computer called the Concierge．
Canadian stores will test the Concierge in July．A similar device, IBM's "Shopping Buddy", has recently been test-marketed at Stop & Shop stores in Massachusetts．
Neither device tells you how many fat grams or calories arc in your cart, but they will flash you with items on sale．The idea is to make it easier for people to buy, not to have second thoughts that maybe you should put something back on the shelf．
“The whole model is driven by advertisers' need In get in front of shoppers, "said Alexander．"They're not watching 30-second TV ads anymore．"
People can use a home computer to make their shopping lists．Once at the store, a shopper can use a preferred customer card to start a system（系统）that will organize the trip around the store．If you're looking for toothpicks, you type in the word or pick it from a list, and a map will appear on the screen showing where you are and where you can find them．
The device also keeps a record of what you buy．When you're finished, the device figures out
your bill．Then you go to the checker or place your card into a self-check-out stand and pay．The new computerized shopping assistants don't come cheap．The Buddy devices will cost the average store about $ 160 000,and the Concierge will cost stores about $ 500 for each device．4．The underlined word "They" （Paragraph 1）refers to____．
A．supermarkets B．shop assistants C．shopping carts D．shop managers 5．Which of the following is the correct order of shopping with computerized shopping carts?
a．Start the system．
b．Make a shopping list．
c．Find the things you want．
d．Go to self-checkout stand．
A．abdc B．bacd C．acbd D．bcad
6．What might be the most suitable title for the text?
A．New age for supermarkets
B．Concierge and Shopping Buddy
C．New computers make shopping carts smarter
D．Touch-screen devices make shopping enjoyable
C
Norm Pethrick, a 36-year-old man in Australia’s northern city Darwin, was praised on Thursday for jumping onto a crocodile’s back to save his wife Wendy at Litchfield National Park, a popular tourist spot southwest of Darwin, a local newspaper reported．
Ms Pethrick was standing on a river bank Wednesday afternoon when the saltwater crocodile lunged （扑）, locking its mouth on both her legs as it tried to drag her underwater．Norm Pethrick, who had been collecting water with his wife, immediately went to help her．He jumped onto the back, poked （戳）the eyes of the crocodile and finally got his wife free．Ms Pethrick was later taken to Royal Darwin Hospital for a medical treatment．The doctors said she was suffering eight puncture wounds in her right leg, a puncture wound in her left leg and a serious cut to one of her fingers．
“This could have been a fatal and tragic situation,” said the general manager of Royal Darwin Hospital （RDH）, Dr Len Notaras, according to a local report．
He said Ms Pethrick was saved by her husband’s “quick and diligent actions”．
Dr Notaras also said she would remain in hospital for three or four days and have an operation to clean the wounds, which are easy to get infected because of bacteria （细菌）on the teeth of the crocodile.
7．This passage is most likely to be found in _______.
A．a travel guide B．a newspaper C．a textbook D．a novel
8．The crocodile attacked Ms Pethrick when she was _______.
A．swimming in the river B．standing on the river bank
C．watching the crocodile D．fishing in the near water
9．Which of the following statements is true about Ms Pethrick?
A．She had eight wounds altogether.
B．One of her fingers got badly hurt.
C．Her eyes were badly poked by the crocodile.
D．One of the crocodile’s teeth was found in her leg.
10．Which of the following would be the best title for this passage?
A．Human beings can defeat crocodiles sometimes.
B．The husband should protect the wife from danger.
C．A crocodile is not as dangerous as people imagine.
D．A man saves his wife’s life from crocodile’s mouth.
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。
How to Raise Responsible Kids
Kids aren’t born knowing how to be responsible．They must be taught．Childr en who don’t learn to be responsible for their actions grow up to become irresponsible adults and blame others for their shortcomings．11．_____
Assign daily chores
12．_____ Young children can do things like pick up their toys, sort and load laundry, and recycle nonbreakable items．Older kids can wash dishes, make up their beds, feed and water pets, clean the floor, and help with yard work．
Teach kids how to be responsible with money
Kids who aren’t taught to be careful with money grow up to make bad financial decisions that can end in debt and poverty．13．______ Start by buying your child a piggy bank and giving him an allowance．Encourage him to put 10 percent of every dollar he gets into his piggy bank to save, and teach him how to budget the rest．
Use logical consequences
There are many times when a parent has a golden opportunity to allow the consequences of bad behavior to take effect; but due to their pity or their desire to “protect” the child, they deprive （剥夺）him of the consequences and punish him in their own way．14．_____ Sometimes the consequences that follow their actions are enough to teach them to be more responsible for themselves and their things．
Model responsible behavior
15．______ Don’t just tell children how to behave responsibly, show them．Teaching children how to be responsible early in life will make them able to function in society as reliable adults．A．There is no need to punish children for anything bad they do．
B．Children learn from the behaviors and values of their parents．
C．This is bad for their future development and career building．
D．Daily chores are a great way to teach kids how to be responsible．
E．Nothing is more important than teaching children to be responsible．
F．Children should learn the basics of money management early in life．
G．Listed below are some things parents can do to raise responsible kids．
第二部分英语知识运用（共三节，满分45分）
第一节完形填空（共20小题, 每小题1分，共20分）
阅读下面短文，从每题所给的A、B、C、D四个选项中，选出最佳选项。
I was back from work．I started to take my coat __16__, when my son, Justin, said, “Dad! I’m going to play __17__ tonight．”
I stared down at him．“__18__ are you playing ball?”
He stared __19__ at me, “Dad, I __20__ a baseball league．” He ran to the door．“It’s downtown．”
I couldn’t __21_ him．We got in the car and headed __22__．We saw a few kids with gloves on their hands．“I guess we’re heading in the __23__ direction．”
He stared out of the window．“__24__? I told you, Dad．”
“I believed you, son,” I answered．
We __25__ the field．The cold wind blew in and the parents shook with __26__, but the kids failed to __27__ it．Their minds were on baseball．The __28__ were just enough to form three teams．
It’s been a long time．The first games were __29__．The young kids had no idea where the ball was to be thrown．If a ball was hit, the fielders（守门员）jumped away from the ball, __30__ getting in front of it．The three teams __31__ each other --- won and lost --- all summer long．The coaches were __32__．They never criticized the kids, but they taught and encouraged the young players．
The second year ended．The kids knew each other __33__．They knew each other’s strengths and weaknesses．To __34__ themselves they attended a city tournament（联赛）．The team did their best and they won a match at last．The team did it __35__ they were a team．They believed in each other．If you work as a team and believe as a team, you will achieve great things．
16．A．on B．out C．down D．off 17．A．game B．ball C．music D．chess 18．A．How B．Where C．Why D．What 19．A．across B．down C．up D．through 20．A．founded B．hated C．left D．joined 21．A．accept B．refuse C．agree D．promise 22．A．downtown B．seaside C．home D．field 23．A．wrong B．opposite C．right D．dangerous 24．A．See B．Hear C．Doubt D．Consider 25．A．missed B．caught C．found D．invented 26．A．laughter B．cold C．fear D．anger 27．A．recognize B．watch C．notice D．meet 28．A．gloves B．cars C．parents D．kids 29．A．success B．ruins C．disasters D．fun 30．A．according to B．as for C．except for D．instead of 31．A．turned B．shouted C．played D．changed
32．A．patient B．careful C．honest D．selfish 33．A．little B．badly C．well D．terribly 34．A．ignore B．prove C．avoid D．protect 35．A．though B．because C．unless D．if
第II 卷（非选择题，共50分）
第二节语法填空（共10小题，每小题1．5分，满分15分）
阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入一个适当的词或使用括号中词语的正确形式填空。
Anna works as a nurse in a doctor’s office．Most of the others in the office are 36．_____ （old）than her．But last week, a young woman 37．_____ （name）Rosie started working there．Anna was delighted to have 38．_____ young nurse in the office．Anna really liked working with Rosie, but the way Rosie acted in restaurants 39．_____ （real）troubled her．Rosie wasn’t very nice 40．______ she talked to the servers．She made them run around and bring her extra things but never said thank you．She never had anything good to say about her meal or the service．
Anna: I really don’t like the way Rosie acts when we go out to eat．
Carl: Why? What does she do?
Anna: She’s rude to the waiter and waitress．She complains 41．______ everything．
Carl: Does she have 42．______ reason to complain?
Anna: No．Every restaurant we have been to has had good food and 43．_____ （serve）．But Rosie still found things to be angry about!
Carl: 44．_____ （sound）like no restaurant is good enough for Rosie．
Anna: No kidding! So what should I do?
Carl: Invite some your other coworkers to go out to eat with you．If the older ladies in your office see the way Rosie behaves, they’ll probably correct her．
Anna: Good point! And maybe she 45．_____ （listen）to them because they’re older．Thanks, Carl!
第三节单词拼写（共10小题，每小题1分，满分10分）
46．There was such a long queue waiting for the tickets and e_______________ we gave up．47．The bad weather is reported to have contributed to the passenger plane __________（坠毁）．
48．After what seemed a long time, they finally arrived at the d______________．
49．I have tried very hard to find a s_____________ to the problem, but without luck．
50．We experienced a f___________ cold winter this year．
51．We should value and make better use of our natural r______________．
52．It was fortunate that Jack n____________ escaped being killed in a traffic accident．
53．It is p____________ that China will land on the moon in the near future．
54．A team of scientists were _______________（勘探）oil in the desert．
55．It is _____________（冒险）to invest too much money in stocks now．
第三部分写作（共两节，满分25分）
第一节短文改错（共10小题；每小题1分，满分10分）
英语课上,老师要求同桌同学相互修改作文。假设以下小作文为你同桌所写，请你对其进行修改。文中共有10处错误,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：在缺词处加一个漏词符号（^），并在此符号下面写出该加的词。
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．每处错误及其修改均仅限一词。
2．只允许修改10处，多者（从第11处起）不计分。
3．必须按答题要求做题，否则不给分。
Dear Editor,
I’m a regularly reader of your newspaper．I like it very much mainly as the following two reasons．First, it covers both national or international news．By simply turning the pages, I can learn about all important events in which happened during the week．Equally attractive is the stories of world-famous people．They help me to understanding how a person can work hard to make the world the better place．As a young student, I suggest whether Global Mirror carry different kind of articles to guide us in our English learning．And I hope that it become even more popular in the future．
Yours sincerely,
Li Hua 第二节书面表达（满分15分）
针对目前高中学生学习压力较大的现状，有人以”Effective Ways to Release the Stress”为题
于上周调查采访了五个学校的800名高中学生。请你根据调查结果写一份报告，并再谈谈自己或身边同学释放压力的有效方法。
注意：
1 词数：120左右
2 调查报告的题目和开头已为你写好（不计入总词数）
3 可根据内容要点适当增加细节，以使行文连贯。
4 参考词汇：心理咨询室the psychological consulting office
Effective Ways to Release the Stress
Nowadays more and more senior three students are getting stressed in their study．In order to find out effective ways to release the stress,
_____________________________________________________________________________ _________________________________________________________________________________ _________________________________________________________________________________ _________________________________________________________________________________ _______________________________________________________________________ 2014-2015学年度山东省滕州市善国中学第二学期高一期末复习自查
英语试题参考答案
第一部分：阅读理解（共两节，满分30分）
第一节（共10小题，每题2分，满分20分）
1-10BDC CBC BBBD
第二节（共5小题，每小题2分，满分10分）
11-15GDFAB
第二部分英语知识运用（共三节，满分45分）
第一节完形填空（共20小题；每小题1分，共20分）
16-35DBBCD BACAC BCDCD CACBB
第二节语法填空（共10小题，每小题1．5分，满分15分）
36．older 37．named 38．another 39．really 40．when
41．about/of 42．a 43．service 44．Sounds 45．will listen
第三节单词拼写（共10小题；每小题1分，共10分）
46---50 eventually, crash, destination, solution, freezing,
51---55 resources, narrowly, predicted, exploring, risky
第三部分写作（共两节，满分25分）
第一节短文改错（共10小题；每小题1分，满分10分）
1．regularly--- regular 2．as --- for 3．or --- and 4．去in 5．is --- are 6．understanding --- understand 7．the --- a 8．whether --- that 9．kind --- kinds 10．it与become 之间加will
第二节书面表达（满分15分）
Effective Ways to Release the Stress
Nowadays more and more senior students are getting stressed in their study．In order to find out effective ways to release the stress, a survey was made last week in five schools．Altogether 800 students were interviewed, and some interesting results were as follows:
About thirty-five percent of the students let out their stress by doing sports．They play football, for instance．Meanwhile, anther forty-five percent of them release their stress by listening to different kinds of music．Interestingly, the rest twenty percent of them usually get help from the school psychological consulting office．
When I’m stressed, I usually do lots of weightlifting to get myself tired．Then I’ll have a good sleep．In this way, I’ll feel relaxed and forget all about my worries．
上海中学 2019-2020 学年高一下期中考试 一、填空题（每空3分,共30分） 1.已知点A (2,-1)在角α的终边上,则sin α=__________. 2.函数sin(2)y x π=+的最小正周期是________. 3．一个扇形半径是2,圆心角的弧度数是2,则此扇形的面积是________. 4.已知函数[]()sin (0,)f x x x π=∈和函数1()tan 2 g x x = 的图像交于A 、B 、C 三点,则△ABC 的面积为________. 5.在平面直角坐标系xoy 中,角α与角β都以x 轴正半轴为始边，它们的终边关于y 轴对称.若1sin 3 α= ,则cos()αβ-=__________.6.已知3sin()45x π-=,则sin 2x =__________.7.设(),0,x y π∈，且满足2222sin cos cos cos sin sin 1sin() x x x y x y x y -+-=+，则x y -=_____.8.我国古代数学家秦九韶在《数学九章》中记述了“三斜求积术”,用现代式子表示即为：在△ABC 中，A ∠、B ∠、C ∠的对边分别是a 、b 、,c 则△ABC 的面积 S =.根据此公式，若cos (3)cos 0a B b c A ++=,且2222a b c +-=,则△ABC 的面积为_______. 9.若函数()2sin(2)1()6f x x a a R π=++-∈在区间0,2π?????? 上有两个不同的零点12,x x ,则12x x a +-的取值范围是__________. 10.已知函数sin ()cos m f ααα-=在(0,2 π上单调递减,则实数m 的取值范围是________.二、选择题（每题4分,共24分） 1.已知cos ,(1,1),(,)2k k π ααπ=∈-∈,则sin()πα+=() A. B. C. D.1k -
2018年浙江省宁波市镇海中学高考英语模拟试卷（5月份） 副标题 一、阅读理解（本大题共10小题，共25.0分） A The quality of our seafood has been in the news a lot lately．A new study has found that people who eat seafood are also eating plastic - 11，000 pieces of microplastic per year to be exact．Researchers at the University of Ghent in Belgium found that seafood eaters are consuming plastic at a concerning rate． "Per serving of mussels （贻贝），which contains about 300 grams of mussel meat，you get 300 pieces of plastic inside your body，" researchers wrote．Researchers don't yet know the implications of eating microplastic，but they worry that it could have negative consequences on our health． While we don't know what microplastic does yet to humans，we do know what it does to sea animals．In earlier studies，scientists have found that when fish eat microplastics，it prevents their growth and changes their feeding patterns．In fact，fish will stop eating natural sources of nutrients，and only go for plastic． When you're done using plastic，a small portion （部分）may be recycled．However，more than likely it's in a landfill or making its way towards the ocean．Once rubbish hits the water，sea creatures may mistake it for food．This often leads to poisoning or death．If they get caught for human's food，the plastic may very well make its way back to you - on your dinner plate． According to a study published in Science magazine，eight million tons of plastic go into our waterways every year．The problem is so serious that scientists say that by 2050 the weight of plastic in our oceans will outweigh fish．And just because it's out of sight，it doesn't mean it should be out of mind． There's no immediate way to prevent microplastic from ending up in your body．However，you can help reduce the amount of plastic reaching rivers，lakes and oceans in the first place．You can make a difference with your choices every day．Even small changes will add up．While your dinner may contain microplastic，you can help prevent the future generations from having that same problem． 1.What does the underlined word "implications" probably mean？______ A. Real functions． B. Potential benefits． C. Logical reasons． D. Possible effects． 2.What do we learn about microplastics in the oceans？______ A. They make fish grow quickly． B. Fish are sick and tired of them． C. Fish tend to be addicted to them． D. They don't affect fish's eating habits． 3.What's the writer's purpose of writing the last paragraph？______ A. To give us a final warning． B. To appeal to us for action． 第1页，共13页
江苏省扬州中学2013—2014学年第二学期期中考试 高一英语试卷 2014.04 第I卷（共85分） 第一部分：听力（共两节，满分20分） 第一节（共5小题;每小题1分，满分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。 1. When does the conversation take place? A. At 5:00. B. At 5:15. C. At 5: 30. 2. What do we know about the woman? A. She didn’t talk to Mary. B. Mary thinks well of the concert. C. Mary is ill. 3. How many novels will the woman read next term? A. Four. B. Five. C. Six. 4. What will the weather be like tomorrow? A. Cold. B. Rainy. C. Windy. 5. Who will leave? A. Carol. B. Carol’s uncle. C. Carol’s sister. 第二节（共15小题;每小题1分，满分15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，你将有时间阅读各个小题，每小题5秒钟；听完后，各小题将给出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. Where does the conversation take place? A. At a clinic. B. At a drugstore. C. At a restaurant. 7. What restaurant did the woman go to first last night? A. Italian. B. Chinese. C. American. 听第7段材料，回答第8、9题。 8. What did the woman do after the party? A. She worked on her homework. B. She went home to sleep. C. She studied history. 9. What does the man feel difficult to do? A. Sleep during the day. B. Work well under stress. C. Organise a birthday party. 听第8段材料，回答第10至12题。 10. What was Paul concerned about? A. His professor. B. His final exam. C. His physics grades. 11. Why did the woman tell Paul not to worry? A. The average was important. B. Chemistry was not his major. C. He needed to concentrate on physics. 12. What did the woman suggest doing? A. Studying harder. B. Going for a coffee. C. Repeating the class. 听第9段材料，回答第13至16题。 13. What blouse does the woman want first?
镇海中学2018学年第一学期期末考试高一 化学试卷 1.下列物质属于盐的是 A. NaOH B. H2SO4 C. Na2CO3 D. Cl2 【答案】C 【解析】 【详解】A项、氢氧化钠是由钠离子和氢氧根离子构成的，属于碱，A错误。 B项、硫酸是由H＋和硫酸根离子构成的化合物，属于酸，B错误。 C项、碳酸钠是由钠离子和碳酸根离子构成的化合物，属于盐，C正确。 D项、氯气属于单质，不属于盐，D错误。 故本题选C。 2.在配制250 mL 0.5mo/L的NaCl溶液的实验中需要用到仪器是 A. B. C. D. 【答案】A 【解析】 【详解】根据配制250mL 0.5mol·L－1的NaCl溶液的步骤可知，配制过程中使用的仪器有：托盘天平、药匙、烧杯、玻璃棒、250mL容量瓶、胶头滴管等，所以使用的仪器为：胶头滴管、玻璃棒、250mL容量瓶； A项、根据图知A为250mL容量瓶，在配制250 mL 0.5mo/L的NaCl溶液的实验中用到，A正确； B项、根据图知B为具支烧瓶，在配制250 mL 0.5mo/L的NaCl溶液的实验中没用到，B错误；C项、根据图知C为冷凝管，在配制250 mL 0.5mo/L的NaCl溶液的实验中没用到，C错误；D项、根据图知D为酒精灯，在配制250 mL 0.5mo/L的NaCl溶液的实验中没用到，D错误；故本题选A。 3.下列物质属于原子晶体的是
A. 氯化钠固体 B. 干冰 C. 金刚石 D. 铜 【答案】C 【解析】 【详解】A项、氯化钠为离子晶体，A错误； B项、干冰为分子晶体，B错误； C项、金刚石是原子晶体，C正确； D项、铜属于金属晶体，D错误。 故本题选C。 4.下列属于氧化还原反应的是 A. CaO+H2O=Ca(OH)2 B. 2NaOH+MgCl2=Mg(OH)2↓+2NaCl C. SO2+H2O2=H2SO4 D. Cu(OH)2CuO+H2O 【答案】C 【解析】 【详解】A项、CaO+H2O=Ca(OH)2为化合反应，元素化合价没有发生变化，不属于氧化还原反应，A错误； B项、2NaOH+MgCl2=Mg(OH)2↓+2NaCl为复分解反应，元素化合价没有发生变化，不属于氧化还原反应，B错误； C项、SO2+H2O2=H2SO4为化合反应，SO2中的S元素化合价由+4价升到+6价，化合价升高作还原剂被氧化，故属于氧化还原反应，C正确； D项、Cu(OH)2CuO+H2O为分解反应，元素化合价没有发生变化，不属于氧化还原反应，D错误， 故本题选C。 5.下列分散系能产生“丁达尔效应”的是 A. 氯化钠溶液 B. 硫酸铜溶液 C. 石灰乳 D. 氢氧化铁胶体 【答案】D 【解析】 【详解】A．氯化钠溶液属于溶液，不是胶体，不能产生丁达尔效应，A错误； B．硫酸铜溶液属于溶液，不是胶体，不能产生丁达尔效应，B错误； C．石灰乳属于浊液，不是胶体，不能产生丁达尔效应，C错误； D．Fe(OH)3胶体能产生丁达尔效应，D正确。
2018年山东省枣庄市滕州市滕东中学中考物理一模试卷 一、本题共15小题，共35分.1～10小题，每小题给出的四个选项中，只有一个是正确的，选对的每小题得2分.11～15小题，每小题给出的四个选项中，至少有一个是正确的.选对的每小题得3分，选对但不全的得2分，选错或不选的得0分.每题选出答案后，用2B铅笔将答题卡上对应的答案标号涂黑. 1．（2分）关于声现象，下列说法中正确的是（） A．“闻其声而知其人”主要是根据声音的响度来判断的 B．“不敢高声语，恐惊天上人”中的“高”指声音的音调高 C．中考期间学校周围路段禁鸣喇叭，这是在声音传播的过程中减弱噪声 D．用超声波能粉碎人体内的“小石头”，说明声波具有能量 2．（2分）如图所示，对下列光学现象的描述或解释错误的是（） A．图（a）中漫反射的光线尽管杂乱无章，但每条光线仍然遵循光的反射定律 B．图（b）中木工师傅观察木板是否平整，是利用了光的直线传播特点 C．图（c）所示炎热夏天公路上的海市蜃楼景象，是由光的反射现象造成的 D．图（d）所示是太阳光经过三棱镜色散后的色光排列情况 3．（2分）祖国山河美景四季如画，下图中关于山河美景的描述，属于凝华现象的是（）A．春天，雾绕群峰B．夏天，雨笼山峦 C．秋天，霜打枝头D．冬天，千里冰封
4．（2分）在如图所示的电路中，当开关闭合后，滑动变阻器滑片P向右移动时，对电表读数的变化，分析正确的是（） A．电流表A、电压表V1示数都减小，电压表V2示数增大 B．电流表A、电压表V1示数都变大，电压表V2示数变小 C．电流表A的示数减小，两电压表示数不变 D．三个电表的示数都不变 5．（2分）如图所示是电阻甲和乙的U﹣I图象，下列说法中正确的是（） A．甲和乙都是阻值不变的电阻 B．当乙两端电压为2V时，R乙＝5Ω C．甲、乙串联在电路中，当电路电流为0.2A时，电源电压为2V D．甲、乙并联在电路中，当电源电压为2V时，电路总功率为1.2W 6．（2分）如图所示，放在M、N两水平桌面上的P、Q两物体，分别在F P＝5N、F Q＝3N 的水平作用下做匀速运动，可以确定（） A．桌面M一定比桌面N粗糙 B．P受到的摩擦力一定大于Q受到的摩擦力 C．P的质量一定大于Q的质量 D．P的速度一定大于Q的速度 7．（2分）如图所示是使用简单机械匀速提升同一物体的四种方式（不计机械自重和摩擦），
2019?2020学年浙江省宁波市镇海中学高一（上）期中数学试卷 一、选择题：每小题4分，共40分 1．设全集U ＝R ，集合A ＝{x|x 2?2x ＜0}，B ＝{x|x ＞1}，则集合A ∩?U B ＝（ ） A 、{x|1＜x ＜2} B 、{x|1≤x ＜2} C 、{x|0＜x ＜1} D 、{x|0＜x ≤1} 2．函数f （x ）＝2x ＋3x 的零点所在的一个区间（ ） A 、（?2，?1） B 、（?1，0） C 、（0，1） D 、（1，2） 3．下列四组函数中，表示同一函数的是（ ） A 、f(x)＝32x -与g(x)＝x x 2- B 、f(x)＝1-x 1+x 与g(x)＝)1)(1(+-x x C 、f （x ）＝lgx 2与g （x ）＝2lgx D 、f （x ）＝x 0与g(x)＝01x 4．已知a ＝log 52，b ＝log 5.00.2，c ＝0.5 2.0，则a ，b ，c 的大小关系为（ ） A 、a ＜c ＜b B 、a ＜b ＜c C 、b ＜c ＜a D 、c ＜a ＜b 5．关于函数f(x)＝5 412++x x ，下列说法正确的是（ ） A 、f （x ）最小值为1 B 、f （x ）的图象不具备对称性 C 、f （x ）在[?2，＋∞）上单调递增 D 、对任意x ∈R ，均有f （x ）≤1 6．若函数f （x ）＝log 21（?x 2 ＋4x ＋5）在区间（3m ?2，m ＋2）内单调递增，则实数m 的 取值为（ ） A 、[ 34，3] B 、[3 4，2] C 、[34，2） D 、[34，＋∞） 7．设a 为实数，若函数f （x ）＝2x 2?x ＋a 有零点，则函数y ＝f[f （x ）]零点的个数是（ ） A 、1或3 B 、2或3 C 、2或4 D 、3或4 8．已知函数f （x ）＝e x ?e x -，g （x ）＝e x ＋e x -，则以下结论正确的是（ ） A 、任意的x 1，x 2∈R 且x 1≠x 2，都有2 121)()(x x x f x f --＜0
2019—2020学年度枣庄市滕东中学第二学期初三摸 底考试初中生物 生物试卷 、选择题〔每题2分，共26分〕 1 ?某班的同学，男生跑1500米时所需的要紧能源和最终能源依次是 A ?太阳能、糖类 B ?糖类、太阳能C.糖类、脂肪2?表示某植物叶 片上气孔的开放和关闭，箭头表示某种物质操纵气孔开闭时的运动方向, 该物质是 6?以下图表示某种植物光照强度与光合作用强度的关系B点的生物学含义 CQ2 - ft 收的 相 D a 值l)—亠A/ 光照誠度D ?脂肪、太阳能 A .水 B .氧气C.空气 3 ?下肢骨骼产生的CO2波送到肺部，不需要通过的部位是 A ?右心房 B ?下腔静脉C上腔静脉D .二氯化碳D .肺动脉 ①肾小脉②入球小动脉③出球小动脉④肾静脉 A .①③B. ①④C.③④ 5.血浆、原尿、尿液都含有的物质有 ①蛋白质②葡萄糖③水④无机盐⑤尿素 A .③④⑤B. ②③④C.①③④D .②④D .②③④ 4?围绕在肾小管周围的毛细血管的开始和聚拢，依次为
A ?无光合作用、有呼吸作用 B .光合作用与呼吸作用达到动态平稳 C .无呼吸作用、有光合作用 D .光合作用与呼吸作用却不进行。 7.当你头疼，流鼻涕、发高烧时，采纳以下哪种做法比较合理 A .自行买药 B .依照电视广告买药 C .找大夫诊断 D .喝热水后盖棉被睡觉 花人工授以黄色品种豆的花粉，那么如此豌豆的未成熟豆荚的颜色将会是 A .全部是绿色 B .全部是黄色 C .绿色、黄色各占一半 D .绿色和黄色豆荚数为 3: 1 12.某患者注射一定剂量人胰岛素后，显现休克现象，假设要使其尽快清醒，可定量注射 A .血浆 B .葡萄糖 C .球蛋白 D .生理盐水 13.以下各项反射活动中，与〝谈虎色变〞这一反射类型相同的是 A .酸橘入口，分泌唾液 B .入的缩手反射 C .杰出的哑剧引发观众哈哈大笑 D .人熟睡时被蚊子叮咬会动一动 二、简答题〔每空I 分，共24分〕 1. 农业生产中，在保证水、肥等的条件下，要让农作物最大限度地利用太阳光能，提高单 位面积产量。在图〔一〕是叶片在阳光下进行的一些生理活动；图〔二〕是时面积指数与农 作物光合作用和呼吸作用两生理过程的关系〔叶面积指数是指单位面积上植物的总叶面积； 叶面积指数越大，叶片交错重叠程度越大〕 。请据图回答以下咨询题： A .抗原 B . 抗体 C .疫苗 9. 以下疾病属于传染病的是 A .肾炎 B . 哮喘 C .心肌炎 10. 染色体要紧存在于什么中 A .细胞质 B . 叶绿体 C .液泡 11. 豌豆未成熟豆荚绿色〔 A 〕 对黄色〔 1 a 〕是显性性状，将一棵绿色 D .有毒物质 D .破伤风 D .细胞核 A 丨豆荚品种的豌豆 8.移植异体器官往往不易成活，用免疫学原理分析，移植器官相当于
微信号：JW2215874840或ross950715或Soulzbb 上海中学 2019-2020 学年高一下期中考试 一、填空题（每空3分,共30分） 1.已知点A (2,-1)在角α的终边上,则sin α=__________. 2.函数sin(2)y x π=+的最小正周期是________. 3．一个扇形半径是2,圆心角的弧度数是2,则此扇形的面积是________. 4.已知函数[]()sin (0,)f x x x π=∈和函数1()tan 2 g x x = 的图像交于A 、B 、C 三点,则△ABC 的面积为________. 5.在平面直角坐标系xoy 中,角α与角β都以x 轴正半轴为始边，它们的终边关于y 轴对称.若1sin 3 α= ,则cos()αβ-=__________.6.已知3sin()45x π-=,则sin 2x =__________.7.设(),0,x y π∈，且满足2222sin cos cos cos sin sin 1sin() x x x y x y x y -+-=+，则x y -=_____.8.我国古代数学家秦九韶在《数学九章》中记述了“三斜求积术”,用现代式子表示即为：在△ABC 中，A ∠、B ∠、C ∠的对边分别是a 、b 、,c 则△ABC 的面积 S =.根据此公式，若cos (3)cos 0a B b c A ++=,且2222a b c +-=,则△ABC 的面积为_______. 9.若函数()2sin(2)1()6f x x a a R π=++-∈在区间0,2π?????? 上有两个不同的零点12,x x ,则12x x a +-的取值范围是__________. 10.已知函数sin ()cos m f ααα-=在(0,2 π上单调递减,则实数m 的取值范围是________.二、选择题（每题4分,共24分） 1.已知cos ,(1,1),(,)2k k πααπ=∈-∈,则sin()πα+=( ) A. C. D.1k -
浙江省镇海中学2019届5月模拟考试英语试题 第一部分：听力（共两节，满分30 分） 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。 1.What does the woman think of the coffee? A. It’s a bit expensive. B. It’s delicious and cheap. C. It’s pretty bad for local business. 2.What happened to the woman? A.Someone knocked her down. B.Her friend went to the hospital for an operation. C.Her wallet was stolen. 3.What are the speakers doing? A. Having a dinner. B. Selling some fruit. C. Enjoying a holiday. 4.What will the woman probably do next? A. Write something down. B. Call her sister. C. Give Mr. Peterson a message. 5.Where does the conversation probably take place? A. Next to a gas station. B. On the side of the road. C. In a car. 第二节（共15 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，你将有时间阅读各个小题，每小题5 秒钟；听完后，各小题将给出5 秒钟的作答时间。每段对话读或独白读两遍。 听第6 段材料，回答第6 至7 题。
江苏省扬州中学2018-2019学年第二学期阶段检测 高一英语试题2019.05 本试卷分第Ⅰ卷(选择题)和第Ⅱ卷(非选择题)两部分。满分150分，考试时间120分钟。 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，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。 1.What does the man suggest the woman do? A.Buy a new dress. B. Exchange the dress. C. Get the dress tailored. 2.What are the speakers talking about? A. A birthday celebration. B. A fancy restaurant. C. A holiday plan. 3.What did the woman do for Mary last night? A.She fixed Mary’s car. B.She gave Mary a phone call. C.She let Mary sleep in her house. 4.Where do the speakers plan to go? A.The theater. B. Their mom’s office C. Their grandma’s house. 5.Who will begin the lecture now? A.Prof. Brookings. B. Dr. Mildens. C. Dr. White. 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，你将有时间阅读各个小题，每小题5秒钟；听完后，各小题将给出5秒钟的作答时间。每段对话或独白读两遍。 听下面一段对话，回答第6和第7两个小题。 6.What did the woman do at the Media Camp? A.She learned poster design. B.She studied film-making. C.She wrote for a magazine. 7.Why did the woman spend her holiday there? A.To visit her brother. B. To try something different. C. To work in the movie industry. 听下面一段对话，回答第8至第10三个小题。 8.What does Julia’s friend’s band need? A.A singer. B. A pianist. C. A guitar player. 9.How many members are there in the man’s band?
2018-2019学年上海市上海中学高一下期中考试数学试题 一、单选题 1．若则在 A．第一象限B．第二象限C．第三象限D．第四象限 【答案】D 【解析】根据三角函数值在各个象限的正负，判断出角的终边所在的象限. 【详解】 由于，故角为第一、第四象限角.由于，故角为第二、第四象限角.所以角为第四象限角.故选D. 【点睛】 本小题主要考查三角函数值在各个象限的正负值，根据正切值和余弦值同时满足的象限得出正确选项. 2．函数的部分图像如图,则可以取的一组值是 A．B． C．D． 【答案】C 【解析】试题分析：∵，∴，，又由得. 3．在△ABC中,分别为三个内角A、B、C的对边,若则△ABC的形状是A．等腰三角形B．直角三角形 C．等腰直角三角形D．等腰或直角三角形 【答案】D 【解析】利用正弦定理化简得：，再利用二倍角公式整理得： ，解三角方程即可得解。 【详解】
由正弦定理化简得：, 整理得：，所以 又，所以或. 所以或. 故选：D 【点睛】 本题主要考查了正弦定理及三角恒等变换，还考查了正弦的二倍角公式及三角函数的性质，属于中档题。 二、填空题 4．函数的最小正周期是_________. 【答案】 【解析】直接由周期公式得解。 【详解】 函数的最小正周期是： 故填： 【点睛】 本题主要考查了的周期公式，属于基础题。 5．已知点P在角的终边上,则_______. 【答案】0 【解析】求出到原点的距离，利用三角函数定义得解。 【详解】 设到原点的距离，则 所以，， 所以 【点睛】 本题主要考查了三角函数定义，考查计算能力，属于基础题。 6．已知扇形的周长为10 cm，面积为4 cm2，则扇形的圆心角α的弧度数为__________．
2019-2020学年浙江省宁波市镇海中学高一（上）期中数学试卷一、选择题：每小题4分，共40分 1．设全集U＝R，集合A＝{x|x2﹣2x＜0}，B＝{x|x＞1}，则集合A∩?U B＝（）A．{x|1＜x＜2}B．{x|1≤x＜2}C．{x|0＜x＜1}D．{x|0＜x≤1} 2．函数f（x）＝2x+3x的零点所在的一个区间（） A．（﹣2，﹣1）B．（﹣1，0）C．（0，1）D．（1，2） 3．下列四组函数中，表示同一函数的是（） A．与 B．与 C．f（x）＝lgx2与g（x）＝2lgx D．f（x）＝x0与 4．已知a＝log52，b＝log0.50.2，c＝0.50.2，则a，b，c的大小关系为（）A．a＜c＜b B．a＜b＜c C．b＜c＜a D．c＜a＜b 5．关于函数，下列说法正确的是（） A．f（x）最小值为1 B．f（x）的图象不具备对称性 C．f（x）在[﹣2，+∞）上单调递增 D．对任意x∈R，均有f（x）≤1 6．若函数f（x）＝（﹣x2+4x+5）在区间（3m﹣2，m+2）内单调递增，则实数m的取值为（） A．[]B．[]C．[）D．[）7．设a为实数，若函数f（x）＝2x2﹣x+a有零点，则函数y＝f[f（x）]零点的个数是（）A．1或3B．2或3C．2或4D．3或4 8．已知函数f（x）＝e x﹣e﹣x，g（x）＝e x+e﹣x，则以下结论正确的是（）A．任意的x1，x2∈R且x1≠x2，都有 B．任意的x1，x2∈R且x1≠x2，都有
C．f（x）有最小值，无最大值 D．g（x）有最小值，无最大值 9．函数f（x）＝|x|+（其中a∈R）的图象不可能是（） A．B． C．D． 10．己知函数，函数y＝f（x）﹣a有四个不同的零点，从小到大 依次为x1，x2，x3，x4，则﹣x1x2+x3+x4的取值范围为（） A．（3，3+e]B．[3，3+e）C．（3，+∞）D．[3，3+e） 二、填空题：单空题每题4分，多空题每题6分 11．已知集合，则列举法表示集合A＝，集合A的真子集有个． 12．函数的定义域是，值域是． 13．已知函数，则f（f（﹣2））＝；若f（a）＝2，则实数a＝． 14．已知集合A＝B＝{1，2，3}，设f：A→B为从集合A到集合B的函数，则这样的函数一共有个，其中函数的值域一共有种不同情况． 15．若函数是R上的单调函数，则实数a的取值范围为．16．若|x|且x≠0时，不等式|ax2﹣x﹣a|≥2|x|恒成立，则实数a的取值范围为．
《芽的类型和结构》 【学习目标】 1、了解芽的种类，理解叶芽的结构及叶芽发育。理解顶芽发育与侧芽发育的关系 2、通过指导学生观察叶芽的结构，培养学生用科学的方法去分析问题和解决问题的能 力。 3、通过分析“顶芽发育与侧芽发育的关系”，使学生树立辩证唯物主义的观点。方法。 【自主学习】 1、芽按照招生位置可分为 和 ；按照将来发育结果，可分为 、 和 ，其中枝芽发育成 。 2、枝芽的结构包括 、 、 、 和 。其中 各部分的作用分别为 。 3、木本植物的茎包括 四部分。 树皮又包括 部分；形成层属 组织,细胞不断分裂,向外形 成 ,向内形成 ，故木本植物茎可以 ；木质部包括 两部分；髓属于 组织，贮存着营养物质。韧皮部包括 两部分,其中筛 管运输 ，方向是 。而木质部中的 管，则运输 方向 是 。 4、在植物的生长发育过程中，顶芽对侧芽有一定的制约关系，当顶芽生长旺盛时，侧芽 的生长就会受到抑制，这种现象叫做 。人们常利用此原理，对作物、果树、花 卉等进行整枝、打杈或摘心，调整 ，提高作物和果树产量及花 卉的观赏价值。 【合作探究】 探究与思考 芽的类型 仔细观察手中的枝条思考下列问题： 1、枝条上的芽一样大小吗？分布的位置有什么不同？ 2、据图说出枝条上的芽A B 3、按将来发育成什么芽可分为 、 、 。 观察与思考 枝芽的结构 1、快速浏览教材30页相关内容了解实验内容： （1）、目的要求 。 （2）、材料用具 （3）、方法步骤、用刀片把枝芽 剖开，再用放大 镜观察芽的结构。 2、观察、思考、交流 （1）结合自己的观察识别右图中各结构。 1 、 2 、3 4 、5 （2）、为什么说枝芽是尚未伸展的枝条？ 生长点 ：芽轴不断 ，并产生新的叶原基和芽原基等 叶原基： 发育成 ， 幼 叶： 发育成 ，芽 轴： 发育成 ，芽原基： 发育成 。所以，叶芽就是未伸展的 。 3、观察、辩证、达成共识 A B
上海市徐汇中学2018-2019学年高一物理下学期期中试题 一、单项选择题 1.匀速圆周运动是一种( ) A. 匀速运动 B. 匀加速运动 C. 匀加速曲线运动 D. 变加速曲线运动 【答案】D 【解析】 匀速圆周运动加速度始终指向圆心，方向时刻在变化，加速度是变化的，是变加速曲线运动，故D 正确，ABC 错误。 2.由于地球自转，地球表面上的物体都随地球一起作匀速圆周运动，将地球视为球体，如图所示， a 、b 两处物体运动的（ ） A. 线速度相同 B. 角速度相同 C. 线速度不同，且v a ＞v b D. 角速度不同，且 a ＜ b 【答案】B 【解析】 a 、 b 两处物体随地球自转一起作匀速圆周运动，则a b ωω=，又因为两者转动的半径a b r r <，据v r ω=可得：a b v v <。 故B 项正确。 点睛：同轴传动：被动轮和主动轮的中心在同一根转轴上，主动轮转动使轴转动进而带动从动轮转动，两轮等转速及角速度。皮带传动：两转轮在同一平面上，皮带绷紧与两轮相切，主动轮转动使皮带动进而使从动轮转动，两轮边缘线速度相等。
3.匀速圆周运动中，线速度v 、角速度ω、周期T 、半径R 之间的关系，正确的是（ ） A. ω=vR B. ω=2πT C. v =ωR D. 1 T ω = 【答案】C 【解析】 【详解】根据角速度定义： 2t T θ πω= = 线速度定义： 2s R v t T π= = 可知： v R ω= v R ω= 2T π ω = A ．ω=vR ，与分析不符，故A 错误； B ．ω=2πT ，与分析不符，故B 错误； C ．v =ωR ，与分析相符，故C 正确； D ．1 T ω =，与分析不符，故D 错误。 4.如图所示，弹簧振子在B 、C 两点间做无摩擦的往复运动，O 是振子的平衡位置．则振子( ) A. 从B 向O 运动过程中速度一直变小 B. 从O 向C 运动过程中速度一直变小 C. 从B 经过O 向C 运动过程中速度一直变小 D. 从C 经过O 向B 运动过程中速度一直变小 【答案】B 【解析】
镇海中学2018学年第一学期校模拟考试 高三年级英语试卷 第I卷 第一部分：听力（共两节，满分30分） 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。 1.What will the man have? A. Coffee with milk. B.Tea with sweet cream. C. Tea with sugar. 2.What does the man think of going to Aspen? A. It costs too much. B. It sounds very interesting. C. He needs to think about it. 3. Why didn’t the woman answer her phone? A. She lost her phone. B. She didn’t want to talk to the man. C. She was not allowed to use the phone then. 4.What did the woman try to do? A. Create a new password. B. Get some information for the man. C. Go online using the man’s new password. 5.When is the assignment due? A. Later today. B. Tomorrow. C. The day after tomorrow. 第二节（共15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，你将有时间阅读各个小题，每小题5秒钟；听完后，各小题将给出5秒钟的作答时间。每段对话读或独白读两遍。 听第6段材料，回答第6至7题。 6.How does the girl feel in the beginning? A. Tired. B. Angry. C. Stressed. 7. When will the man help the woman? A. Tomorrow after school. B.All night tonight. C.On Friday. 听第7段材料，回答第8至10题。 8.What is the probable relationship between the speakers? A. Teacher and student. B. Mother and son. C. Husband and wife.
江苏省扬州中学2019-2020学年第一学期高一英语月考试卷 2019.10 第一部分听力（略） 第二部分：阅读理解（共两节，满分45分） 第一节（共15小题，每小题2分，满分30分） A On Saturday nights, A. J. Coston doesn't get a lot of sleep. Usually three or four times a night, a loud bell rings, a red light flashes, and he has to jump out of his bed. That's because he's a weekend volunteer firefighter(消防员) with Loudoun County Fire and Rescue Station 13 in Northern Virginia. During the week, he lives at home with his mom, dad and sister and does his main job which is going to high school. “I always wanted to get into firefighting since I was a little kid watching fire trucks go by,” he says.“One day on the Internet I noticed that Loudoun County offered a junior firefighter program.”He was only 16, but he got it. Fighting fires is dangerous work. Firefighters never stop practicing the skills they need to stay safe. Once Coston learned those skills, he was allowed to work inside burning buildings. “Teamwork is the most important,” he says.“It's the whole team that puts the fire out.” Firefighters feel great about helping people.“My most unbelievable call was probably the time four kids were struck by lightning,” says Coston. He will be off to college next fall, building on his dream job. "I'll get my degree in emergency (紧急情况) medical care. and then work in a fire and rescue company for a while. I want to be a flight doctor on a helicopter in the end, but I will never forget the days as a firefighter. These are my unforgettable experiences,” he says. 21. Coston can't sleep well on Saturday nights because . A. he has to work part-time at weekends B. he has some sleeping problems C. he has to do his job as a volunteer firefighter D. he always worries that a fire may break out 22. What do we learn about Coston from the passage? A. He doesn't like studying at school. B. He will go to college next year. C. He dreams to be a great hero one day.