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黑龙江省大庆实验中学2015-2016学年高一上学期期末考试英语试题 Word版含答案.doc

黑龙江省大庆实验中学2015-2016学年高一上学期期末考试英语试题 Word版含答案.doc
黑龙江省大庆实验中学2015-2016学年高一上学期期末考试英语试题 Word版含答案.doc

大庆实验中学2015—2016学年度上学期

高一年级英语期末考试试题

说明:1. 本套试题答题时间120分钟,总分为150分。

2. 本套试题共分四部分:听力、阅读理解、语言知识运用、写作。

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. What does the woman think is more difficult?

A. Chess.

B. Football.

C. V olleyball.

2. What does the woman do now?

A. A painter.

B. A teacher.

C. An actress.

3. How is the man going home?

A. By train.

B. By bus.

C. By taxi.

4. What can we learn from the conversation?

A. It is 9:30 now.

B. The last plane left five minutes ago.

C. The man will leave Chicago in half an hour.

5. Why isn’t the man cheerful?

A. The questions are too hard.

B. He hasn’t finished the questions.

C. The questions have little to do with the book.

第二节(共15小题;每小题1分,满分15 分)

听下面5段对话。每段对话后有几个小题,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至7题。

6. Who is making the telephone call?

A. Mary.

B. Steve.

C. Tina.

7. When does the play start?

A. At 7:00.

B. At 8:00.

C. At 9:00.

听第7段材料,回答第8至9题。

8. Why doesn’t the woman work for the former company?

A. The salary is low.

B. Her office is far from home.

C. The company is small.

9. How much money does the woman want for a year?

A. About £ 12,000.

B. About £ 20,000.

C. About £ 200,000.

听第8段材料,回答第10至12题。

10. Where are the speakers?

A. At the airport.

B. At the man’s home.

C. At a café.

11. How many people are there in the man’s family?

A. Three.

B. Four.

C. Five.

12. What do we know about Jamie?

A. He has been married.

B. He is a college student.

C. He is younger than Julian.

听第9段材料,回答第13至16题。

13. How did the woman get to know about the club?

A. From a newspaper ad.

B. From her mother.

C. From her friends.

14. What activity is the woman interested in?

A. Culture.

B. Sports.

C. Language.

15. When will the club members practice German?

A. On Monday evening.

B. On Wednesday evening.

C. On Friday evening.

16. What will the woman do next?

A. Send a form.

B. Write down her name.

C. Give her personal information to the man.

听第10段材料,回答第17至20题。

17. What is the woman’s major (专业)?

A. Painting.

B. English.

C. Japanese.

18. When did the woman last see Lily?

A. Three days ago.

B. One week ago.

C. Three years ago.

19. What is Lily’s problem?

A. She has little chance to speak Chinese.

B. She finds it difficult to write Chinese words.

C. She doesn’t know how to remember Chinese words.

20. Where does the woman plan to further her study?

A. In China.

B. In Italy.

C. In England.

第二部分:阅读理解(共两节,满分40分)

第一节(共15小题;每小题2分,满分30分)

A

My wife and I have always been friendly with the clerks at the local store. I don’t think many people appreciate what a difficult job these clerks have. They work for a little money and I often wonder how they make ends meet.

One of the clerks, Charlie, was always wearing his glasses but he didn’t one day. I asked him about it a nd he said they’d been out of order and that he couldn’t afford a new pair. His family needed money. It was clear that he was having a difficult time.

We wanted to help him, so we turned to our own eye doctor for help with a plan. We had his secretary contact him, asking him to come in for an eye exam for free. We told the doctor to let him order whatever glasses he wanted and that we would pay for them. Although Charlie questioned what was going on, the doctor just told him that someone had offered the money for his new glasses. When we went in to pay the bill, the doctor told us he was touched by our idea so that he waived the exam fee and only charged us for half the price of the glasses!

It was so wonderful to see Charlie in his new glasses and he enjoyed telling all the regular customers how the gift came about. I’m sure that upon hearing h is story, ideas of kindness may have come in the minds of many people.

21. Why didn’t the clerk Charlie wear glasses one day?

A. It was very warm and fine.

B. His glasses were missing.

C. His old glasses were broken.

D. He forgot to wear his glasses.

22. From the passage, we can infer that ______.

A. Charlie was a young man with skills

B. Charlie knew who paid the money for the new glasses

C. Charlie completely accepted the money for the new glasses

D. Charlie couldn’t support his family with enough money

23. The underlined word “waived” in the third paragraph can be replaced by ______.

A. took up

B. gave up

C. cut down

D. put off

24. Which of the following could be the best title for the passage?

A. Customers’ Gift to an Employee

B. A Friendly Clerk — Charlie

C. The Wonderful Feeling of Helping others

D. An Expensive Pair of Glasses

B

The worst days of any summer are the rainy ones. We spend all year looking forward to nice weather and long, hot days. In winter, with its cloudy days and bitter cold, we dream of those days at the beach, lying on the sand and enjoying the bright and burning sun. And then, summer comes, and it rains.

As a child, I would wake up to rainy summer days and come close to crying. It wasn’t fair. We suffered through months of school and experienced bad weather for those short ten weeks of freedom.

On those rainy summer days, I had nothing fun to do and could only sit inside, staring out at the rain like a bird in a cage. I was an only child, so there was no one else to play with. My father worked from home, so I was not truly alone, but he could not actively play with me since he was at work. It was those days that I would watch whatever was on television or read any books that I could find lying around. I’d pray each night that the rain would not be there the next day.

As an adult, though, my opinion of summer rain has changed. When you have to work every day, summer is not as exciting. Everything seems uninteresting. Such a mindset makes you cheer for anything new or different. I spend the winter dreaming of summer and the summer dreaming of winter. When summer comes, I hate how hot it is. And then I look forward to the rain, because the rain brings with it a cold front, which makes me comfortable. Rainy days are still the worst days of the summer, but summer rain today means positively beautiful —and quite cooler —weather tomorrow.

25. When the author was a child, he ______.

A. liked staying indoors

B. hated rainy days

C. dreamed on summer days

D. preferred cooler weather

26. We can learn from the passage that the author ______.

A. could enjoy the brilliant sun in winter

B. preferred reading to playing outside

C. had no brothers or sisters

D. was often left alone at home

27. As an adult, the author views summer rain differently because ______.

A. rain makes the weather cooler

B. his summer holiday is very short

C. he knows it won’t l ast long

D. he can better deal with his spare time

C

Great white sharks! Just hearing that name makes many people’s hair stand on end. In reality, these big fish have more to fear from us than we do from them. For many years, people killed countless great white sharks in the waters around the United States.

But thanks to conservation (保护) efforts, great whites are making a comeback in the U.S. Two recent studies show that the population of these sharks is rising along the east and west coast.

Why is the gr owing population of a killer fish something to celebrate? “When you fish too many of them, you start to lose balance in the environment,” says shark researcher Tobey Curtis. As the biggest killer, sharks help keep the populations of fish, seals, and other creatures they eat from growing too large.

In spite of their importance, great white sharks had long been hunted for their meat and their fins (鳍). Then, in 1997, the U.S. government passed a law that didn’t allow the hunting of great

whites. Afterwards, the numbers of these sharks in the U.S. waters started to increase.

The law wasn’t the only thing that has helped great whites. Conservationists have also played a part in the sharks’ comeback. The research group OCEARCH is using a method called tagging (加标签) to help change people’s attitudes about great white. They let the public follow each shark as it travels the world’s oceans. OCEARCH also gives each tagged shark a name to help people form a closer connection with the big fish.

The group’s most well-known shark is named Katharine. She was tagged last year near Cape Cod, Massachusetts. Since then, thousands of people have tracked Katharine’s movements on Twitter and the OCEARCH website.

This helps people see sharks in a new way. Chris Fischer, the founder of OCEARCH believes learning to appreciate great whites will encourage people to do more to protect them.

28. The underlined part “makes many people’s hair stand on end” in Paragraph 1 can best be

replaced by______.

A. worries many people

B. bores many people

C. frightens many people

D. interests many people

29. The law passed in 1997 ______.

A. seemed very helpful

B. let scientists down

C. needed to be changed

D. made people like great whites

30. Katharine’s example is used to show that ______.

A. great whites are in fact lovely animals

B. the OCEARCH website has a lot of visitors

C. the number of great whites is growing quickly

D. OCEARCH help people get closer to great whites

31. The main purpose of the passage is to ______.

A. introduce an experiment result

B. make an advertisement for OCEARCH

C. remind us that big killers are dying out

D. inform us that great whites are making a comeback

D

In the Internet age, speed reading is a necessary and important skill. We skim over articles

and e-mails to try to get key words and the main idea of the text. With so much information through our electronic devices (电子设备), it would be impossible to get through everything if we read word by word, line by line. However, a new trend calls on people to enjoy reading slowly.

A recent story from The Wall Street Journal reported on a book club in Wellington, New Zealand, where members meet in a caféand turn off their smartphones. They sit back in comfortable chairs and read in silence for an hour.

Unlike typical book clubs, the point of the slow reading club isn’t to exchange ideas about certain books, but to get away from electronic devices and read in a quiet, relaxed environment. According to the story, the Wellington book club is just one example of a movement started by book lovers who miss the traditional way of reading.

Traditional readers, like Maura Kelly, say a regular reading habit sharpens the mind, improves concentration, reduces stress levels and deepens the ability to understand others. Some of these benefits have been backed up by science. For example, a study of 300 elderly people published by the journal Neurology last year showed that adults who take part in activities that use their brain, such as reading, suffer less memory loss as they get older. Another study published last year in Science showed that reading novels helps people understand others’ mental states and beliefs — a key skill in building relationships.

Yet technology has made us less careful readers. Computer and phone screens have changed our reading patterns from the top-to-bottom, left-to-right reading order we traditionally used, to a wild skimming pattern as we hunt for important words and information. Reading text online that has many links to other web pages also leads to weaker comprehension than reading plain text. The Internet may have made us stupider, says British journalist Patrick Kingsley, only half joking. Because of the Internet, he says we have become very good at collecting a wide range of factual tidbits (花边新闻), but we are also gradually forgetting how to sit back, think and connect all these facts with each other.

32. Speed reading is a necessary and important skill in the Internet age because people ______.

A. no longer read word by word, line by line

B. have to get the meaning faster

C. have much more information to read

D. must use their smartphones more frequently

33. Members of the Wellington book club are expected to ______.

A. make coffee for the other members

B. read peacefully for an hour

C. regularly exchange ideas about books

D. turn off their smartphones for sleeping

34. According to the Neurology study, who is most likely to suffer memory loss?

A. A 79-year-old woman who reads regularly.

B. A 17-year-old middle school student who seldom reads.

C. A healthy 24-year-old university graduate who often plays games.

D. A 65-year-old man who rarely reads.

35. The last paragraph is written to ______.

A. explain the secrets of others’ minds

B. describe the problems caused by electronic reading

C. call on people to read more about science

D. encourage people to read as slowly as possible

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。

If you are like most international students, you are probably pretty comfortable reading and writing in English, but not as comfortable with listening and speaking in the language. 36 Make friends with American students. Many international students end up making friends with a lot of — or only — other international students. 37 Hanging out with natives not only naturally pushes you to improve your spoken English, but also helps you pick up cultural and social information.

Learn from American friends. Tell your American friends that you are trying to improve your listening and speaking skills, and would like them to help you. If you pronounce a word incorrectly, or misuse an idiom, you want them to tell you. 38

Increase your knowledge. 39 If you have known about the topics that are likely to be discussed in conversation, you have a much better chance of understanding people when they talk, and of being able to express yourself well.

40 If you have to explain something to someone, you have a strong desire to pronounce

everything as well as you can, and find other ways to explain yourself. Finally, this becomes a good habit. Many people have asked me how I learned to speak English fluently, and I think it is because of my being a math teacher in college for years.

A. I do n’t think this is a good idea.

B. You will learn much faster this way.

C. If possible, become a teacher at your school.

D. It’s a win-win opportunity for international students.

E. Read books, keep up with news and watch popular shows and movies.

F. It’s a good way to make some extra cash while improving your English.

G. Below are some tips to help you to improve your conversational skills.

第三部分:语言知识运用(共三节,满分55分)

第一节: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。

The first week is always a bit hard in my writing classes. I’m unfamiliar41 the students, most of them trying to 42 themselves to their new environment. When Jennifer 43 me with a question on the second day, I was 44 for the chance to connect at least one name with a face.

Her writing wasn’t perfect,45 her effort was. She worked hard and pushed herself to achieve. She was excited to 46 , which made me enjoy teaching her. I didn’t 47 then how much she would also teach me.

One Friday afternoon, Jennifer 48 after class. She wasn’t asking a question about a paper I’d returned.49 , she said quietly: “I didn’t attend classes yesterday. I was at the health center the whole day.” I gave her a sideways look,50 . “It was just a virus (病毒). I’m fine now,” she 51 me. Then she was gone.

Two nights later, her father called to tell me that Jennifer would be 52 a few classes. She had been in hospital with meningitis (脑膜炎). I 53 him again a few days later, and again after that. Her condition grew worse. We made trips to the hospital room. I was 54 frightened when I saw the pale, thin and weak girl who, only ten days earlier, had displayed life and 55 in my classroom.

A week later, Jennifer herself called me to tell me she was on the road to 56 . “I’ll be back,” she said. “I have no57 ,” I told her, fighting back tears. I remembered what her father had said in his first phone call: “school 58 everything to Jenny.”

Then five weeks later, I walked into my classroom to find Jenny in her seat, smiling. She 59 all of her missed homework, completed with thought and excellence. The 60 of her will to overcome shone out of her pale, weak, eighteen-year-old face.

41. A. for B. to C. with D. among

42. A. concentrate B. adapt C. devote D. adopt

43. A. provided B. bothered C. challenged D. approached

44. A. thankful B. prepared C. disappointed D. embarrassed

45. A. so B. or C. and D. but

46. A. receive B. contact C. learn D. give

47. A. realize B. argue C. care D. admit

48. A. went ahead B. broke into C. stopped by D. took off

49. A. However B. Instead C. Therefore D. Besides

50. A. shy B. astonished C. delighted D. excited

51. A. impressed B. supported C. attracted D. comforted

52. A. expecting B. imitating C. missing D. taking

53. A. heard from B. came across C. looked for D. called on

54. A. hardly B. mainly C. truly D. frequently

55. A. fear B. sadness C. shyness D. warmth

56. A. recovery B. success C. school D. attitude

57. A. idea B. doubt C. opinion D. influence

58. A. shares B. means C. creates D. exchanges

59. A. gave up B. put up C. left out D. handed in

60. A. strength B. information C. comprehension D. achievement

第二节:单项填空(共10小题;每小题1分,满分10分)

61. — Have you seen ______ film before?

—Yes. I saw it on ______ Christmas Day, but I can’t remember the exact year.

A. a; a

B. a; the

C. the; a

D. the; the

62. — What do you do, Lucy?

—I’m a secretary in a foreign company now, but I ______ English in a high school for 10 years.

A. teach

B. am teaching

C. have taught

D. taught

63. Tom is really ______! Working with him in the same office, I don’t think I’ll get ______.

A. amusing; boring

B. amusing; bored

C. amused; bored

D. amused; boring

64. I don’t allow ______ in my office and I don’t allow my family ______ at all.

A. smoking; smoking

B. to smoke; to smoke

C. smoking; to smoke

D. to smoke; smoking

65. — Come on, please give me some ideas about the project.

— Sorry. With so much work ______ my mind, I almost break down.

A. filled

B. filling

C. to fill

D. fills

66. Arriving at the party in a great hurry, we were disappointed to find that the band ______ playing.

A. stopped

B. will stop

C. has stopped

D. had stopped

67. The students were playing football happily on the playground ______ it began to rain heavily.

A. as

B. while

C. when

D. suddenly

68. — How often do you go shopping online?

— Only sometimes, not ______.

A. similarly

B. frequently

C. completely

D. immediately

69. — You seem busy these days.

—Yes. I’m writing a story. You know, it’s real ly not easy to write ______ with attractive plots.

A. this

B. it

C. one

D. that

70. They had to ______ the meeting because the organizers didn’t prepare the hall well, where

people can share their opinions.

A. put off

B. take off

C. put up

D. take up

第三节(共10题;每小题1.5分,满分15分)

阅读下面材料,在空白处填入适当的内容(1个单词)或括号内单词的正确形式。

Many stories happened at the Children’s Medical Care Center, 71 deeply touched us.

We saw a lot of children without hair because of their treatment. We played with them and taught them to draw pictures. They suffered great pains, 72 were very friendly. It was much easier to communicate with them than we 73 (expect).

One day, a girl suggested 74 (teach) us how to fold paper. She taught us 75 great patience, explaining each step slowly and clearly. Though we could easily do that, we still pretended (假装) to know nothing about it. We followed her and did everything she told us. Finally, when we finished our work 76 (success), she gave each of us 77 big hug. We could see the pride and happiness on her face. Her father was 78 thankful to us that he held our hands tightly, tears in his eyes. It was not until then 79 we knew the girl would receive an operation the next day.

It was really a valuable experience to us all. We began to think about how to deal with the difficulties in life, because 80 (compare) with what these kids are going through, our “troubles” seem not worth mentioning at all.

第四部分:写作(共两节,满分35分)

第一节:短文改错(共10小题;每小题1分,满分10分)

文中共有10处语言错误。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. 每处错误及其修改均仅限一词;

2. 只允许修改10处,多者(从第11处起)不计分。

A lecture on “English learning” was held on an afternoon of last Friday in our school. The lecture giving by a professor from Peking University lasts from 2:00 to 4:00. He stressed serious the importance of learning English in modern times. Then he shared their learning experience with us. Besides, he introduced some useful ways memorize English words or improve our spoken English. After the interested lecture, we asked him for advices on some problems we had while learning English. We have been learned a lot from this lecture.

第二节:书面表达(满分25分)

有人喜欢去电影院看电影,有人喜欢在网上看电影。请你根据以下提示给某英语杂志写一篇英语短文,分析人们选择不同观影方式的不同原因,并发表你的看法。

注意:

1. 词数100左右(开头已给出,但不计入总词数);

2. 可以适当增加细节,以使行文连贯。

Do you like to go to the cinema or watch a film online?_____________________________________

_______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ __________________________________________

高一年级英语期末考试试题答案

1-20 CBABC ABCAA CBACB CACAB

21-40 CDBA BCA CADD CBDB GABEC

41-60 CBDAD CACBB DCACD ABBDA

61-70 CDBCB DCBCA

71. which 72. but 73. had expected 74. teaching 75. with

76. successfully 77. a 78. so 79. that 80. compared

改错:an-the; giving-given; lasts-lasted; serious-seriously; their-his; memorize前加to; or-and; interested-interesting; advices-advice; been 去掉

作文:

Do you like to go to the cinema or watch a film online? People have different answers to the question.

Some people think going to the cinema is a better choice. To begin with, it’s a good way to communicate with friends who watch the film together. Besides, the image and sound effects there are amazing, and totally different from what they experience at home. Other people, however, prefer to watch movies at home. They think it’s convenient and money-saving to watch films online. What’s more, they can enjoy the films they choose to see in such a quiet place without being disturbed.

As far as I’m concerned, I like seeing films in the cinema because I enjoy the atmosphere there.

湖北湖北省宜昌市夷陵中学物理 静电场及其应用精选测试卷专题练习

一、第九章 静电场及其应用选择题易错题培优(难) 1.如图所示,带电量为Q 的正点电荷固定在倾角为30°的光滑绝缘斜面底端C 点,斜面上有A 、B 、D 三点,A 和C 相距为L ,B 为AC 中点,D 为A 、B 的中点。现将一带电小球从A 点由静止释放,当带电小球运动到B 点时速度恰好为零。已知重力加速度为g ,带电小球在A 点处的加速度大小为 4 g ,静电力常量为k 。则( ) A .小球从A 到 B 的过程中,速度最大的位置在D 点 B .小球运动到B 点时的加速度大小为 2 g C .BD 之间的电势差U BD 大于DA 之间的电势差U DA D .AB 之间的电势差U AB =kQ L 【答案】BC 【解析】 【分析】 【详解】 A .带电小球在A 点时,有 2 sin A Qq mg k ma L θ-= 当小球速度最大时,加速度为零,有 '2 sin 0Qq mg θk L -= 联立上式解得 '2L L = 所以速度最大的位置不在中点D 位置,A 错误; B .带电小球在A 点时,有 2 sin A Qq mg k ma L θ-= 带电小球在B 点时,有 2sin 2 B Qq k mg θma L -=() 联立上式解得

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省重点叫一类,市重点叫二类 一类的有24所: 武汉市第一中学、武汉市第二中学、武汉市第三中学、武汉市第四中学、武汉市第六中学、武汉市第十一中学、武汉市十二中、武汉市第十四中学、武汉市十七中、武汉市第四十九中学、吴家山中学、湖北省武汉中学、湖北省水果湖高级中学、武汉外国语学校、湖北省武昌实验中学、华中师范大学第一附属中学、武钢第三子弟中学、洪山高中、汉口铁中、新州区第一中学、黄陂区第一中学、武汉市汉南一中、江夏一中、蔡甸区汉阳一中 二类有25所: 武汉市育才中学、汉市第二十中学、武汉市实验学校、武汉市第十六中学、武汉市育才高中、武汉市第十九中学、武汉高第六十八中学、武汉市第二十七中学、武汉市第二十九中学、武汉市第二十六中学、武汉市第六十五中学、武汉市第二十三高中、武汉市第十五中学、武汉市女子高级中学、湖北大学附属中学、武汉市东湖中学、蔡甸区第二中学、江夏区实验高级中学、新洲区第二高级中学、新洲区第三高级中学、新洲区第四高级中学、武汉市经济开发区一中、武汉钢铁集团公司第四中学、一冶四中、武汉市常青一中 湖北省53所省级重点中学综合实力排名 1华中师范大学第一附属中学 2武汉外国语学校 3黄冈中学 4武汉市第二中学 5武汉市第六中学 6武汉市第三中学 7武汉市第四中学 8武钢第三子弟中学 9湖北省黄石市第二中学 10宜昌市夷陵中学 11荆州市荆州中学 12武汉市第十一中学 13武汉市第四十九中学 14湖北省武昌实验中学 15襄樊市第四中学 16襄樊市第五中学 17湖北省水果湖高级中学 18武汉市第一中学

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2019-2020学年浙江省宁波市镇海中学高一上学期期中数学试题(解析版)

2019-2020学年浙江省宁波市镇海中学高一上学期期中数学 试题 一、单选题 1.设全集U =R ,集合{ } 2 20A x x x =-<,{} 1B x x =>,则()C U A B =() A .{} 12x x << B .{} 12x x ≤< C .{} 01x x << D .{} 011x <≤ 【答案】D 【解析】先解一元二次不等式,化简集合A,再利用数轴进行集合的补集和交集运算可得. 【详解】 解一元二次不等式化简集合A,得{|02}A x x =<<, 由{|1}B x x => 得{|1}U C B x x =≤, 所以(){|01}U A C B x x ?=<≤. 故选D. 【点睛】 本题考查了一元二次不等式的解法,集合的交集和补集运算,用数轴运算补集和交集时,注意空心点和实心点的问题,属基础题. 2.函数f(x)=23x x +的零点所在的一个区间是 A .(-2,-1) B .(-1,0) C .(0,1) D .(1,2) 【答案】B 【解析】试题分析:因为函数f(x)=2x +3x 在其定义域内是递增的,那么根据f(-1)= 15 3022 -=-<,f (0)=1+0=1>0,那么函数的零点存在性定理可知,函数的零点的区间为(-1,0),选B 。 【考点】本试题主要考查了函数零点的问题的运用。 点评:解决该试题的关键是利用零点存在性定理,根据区间端点值的乘积小于零,得到函数的零点的区间。 3.下列四组函数中,表示同一函数的是( ) A .()f x =与()g x = B .()f x = ()g x =

C .2()lg f x x =与()2lg g x x = D .0()f x x =与01()g x x = 【答案】D 【解析】在A 选项中,前者的y 属于非负数,后者的0y ≤,两个函数的值域不同;在 B 选项中,前者的定义域为1x >,后者为1x >或1x <-,定义域不同;在 C 选项中, 两函数定义域不相同;在D 选项中,()0 f x x =定义域是{}()01 |0,x x g x x ≠= 的定义域为{}|0,x x ≠,定义域不相同,值域、对应法则都相同,所以是同一函数,故选D. 4.已知5log 2a =,0.5log 0.2b =,0.20.5c =,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 << 【答案】A 【解析】利用10,,12 等中间值区分各个数值的大小。 【详解】 551log 2log 2 a =<< , 0.50.5log 0.2log 0.252b =>=, 10.200.50.50.5<<,故 1 12 c <<, 所以a c b <<。 故选A 。 【点睛】 本题考查大小比较问题,关键选择中间量和函数的单调性进行比较。 5.关于函数()21 45 f x x x = ++的说法,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x ?∈R ,()1f x ≤ 【答案】D 【解析】将函数()f x 变形为2 1 ()(2)1 f x x =++,根据2(2)0x +≥可知函数()f x 的最大值为1,所以A 不正确;D 正确;

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