【英语】黑龙江省大庆实验中学2015-2016学年高一上学期期中考试

【英语】黑龙江省大庆实验中学2015-2016学年高一上学期期中考试
【英语】黑龙江省大庆实验中学2015-2016学年高一上学期期中考试

大庆实验中学2015—2016学年度上学期

高一年级英语期中考试试题

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. Where does the conversation take place?

A. In a store.

B. In the street.

C. In a park.

2. When will the music show start?

A. At8:20.

B. At8:30.

C. At 8:40.

3. What is the man doing?

A. Offering help.

B. Giving permission.

C. Asking for suggestion.

4. What does the man tell the woman to do?

A. Teach her son by herself.

B. Have confidence in her Son.

C. Askthe teacher for extra help.

5. What can we learn from the two speakers?

A. They are brother and sister.

B. They like stories.

C. They may grow up together.

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。每段对话读两遍。

听第6段材料,回答第6至7题。

6. What month is it now?

A. September.

B. October.

C. November.

7. What do we know about the speakers?

A. They both enjoy sports.

B. They are both in training.

C. They are both football players.

听第7段材料,回答第8至10题。

8. Why does the woman refuse to speak to John?

A. John lost her telephone.

B. John didn’t keep his promise.

C. John doesn’t want to tell his story.

9. When does the woman agree to meet John?

A. At 5 o’clock.

B. At 6o’cloc k.

C. At 7 o'clock.

10. What is the probable relationship between the two speakers?

A. Friends.

B. Boss and employee.

C. Teacher and student. 听第8段材料,回答第11至13题。

11. What did the girl do last night?

A. She went to the cinema.

B. She celebrated her sister's birthday.

C. She looked for her physics book.

12. When will the speakers meet?

A. At 12:13pm.

B. At 12:30pm.

C. At12:15pm.

13. Why is the girl worried about her physics exam?

A. She hasn’t prepared well.

B. She has no exam papers.

C. She has lost her physics book.

听第9段材料,回答第14至16题。

14. Where doesthe conversation probably take place?

A. On a ship.

B. In an airplane.

C. In a restaurant.

15. Which of the following is TRUE?

A. The man is a teacher now.

B. The man traveled a lot on business before.

C. The man was perhaps a soldier during the Second World War.

16. What is the man going to do?

A. Visit his grandson.

B. Fetchhiswife.

C. Travel around the world.

听第10段材料,回答第17至20题。

17. What was there in the desert where all was dry?

A.A young flower.

B. A small camel.

C. A young tree.

18. How was her feeling when hearing the sun's reply?

A.Worried.

B. Sad.

C. Pleased.

19. What was all the young flower wanted to do?

A. Have a chance to lie in this corner of sand.

B. Bring a little bit of beauty to this world.

C. Have a chance to live in this corner of sand.

20.What happened one day?

A. The hunter took her away.

B. The hunter came by and removed her.

C. The hunter came by and stepped on her.

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

An 80-year-old man was sitting on the sofa in his house along with his 45-year-old highly educated son.

Suddenly a crow(乌鸦)perched on the tree near their window.

The father asked his son, ''What is this? ''

The son replied, ''It is a crow. ''

After a few minutes, the father asked his son the 2nd time, ''What is this? ''

The son said, ''Father, I told you just now. It's a crow. ''

After a little while, the old father again asked his son the 3rd time, ''What is this? ''

''It's a crow, a crow, a crow.'' said the son loudly.

A little after, the father again asked his son the 4th time, ''What is this? ''

This time the son shouted at his father, ''Why do you keep asking me the same question again and again? 'IT IS A CROW'. Are you not able to understand this? ''

A little later the father went to his room and came back with an old diary, which he had kept since his son was born. On opening a page, he asked his son to read that page. When the son read it, the following words were written in the diary:

''Today my little son aged three was sitting with me on the sofa, when a crow was sitting on the window. My son asked me 23 times what it was, and I replied to him all 23 times that it was a crow. I hugged him lovingly each time he asked me the same question again and again for 23 times. I did not at all feel angry; I insteadfelt love for my innocent child. ''

21. What does the underlined word ''perched'' mean in the passage?

A. knocked

B.flew

C. landed

D. covered

22. Why did the Father ask the same question again and again?

A. Because he couldn't understand what his son said.

B. Because he was too old to remember anything.

C. Because he wanted to make his son angry.

D. Because he wanted to see how patient his son would be.

23. How old was the old man when his son asked him 23 times ''What is this''?

A. 80 years old.

B. 45 years old.

C. 38 years old.

D. 35 years old.

24. What is the most suitable title for the passage?

A. A crow.

B. Father's love.

C. An old dairy.

D. An old man.

B

We like to think that the reasons for seeking wealth are common. Humans, by nature, like to be comfortable, like to have power and like to have the choices and freedom offered by lots of money.

Yet in fact, people's understanding in the meaning of wealth is different around the world.

The new Barclay's Wealth Insights study finds that the rich of emerging (新兴的) markets view wealth very differently from Europeans with quite a long rich history and Americans with a slightly shorter rich history.

The study surveyed 2,000 people from 120 countries with investible assets (可投资资产) of $1.5million or more. They shared some common views: a large majority of rich people from all over the world agreed that wealth enabled them to buy the best products and that wealth gave

them more freedom of choice in their lives. Most also agreed that wealth was a reward for hard work.

But the differences are more interesting.

Respect — Asians and Latin Americans were more likely (49% and 47% ) to say that wealth allowed them to get respect from friends and family. Only 28% of Europeans and 38% of Americans said respect was a byproduct (副产品) of wealth.

Happiness— About two thirds of Europeans and Americans said wealth made them happy. But it had a greater happiness influence in emerging markets, with 76% of Asians and Latin Americans saying wealth made them happy.

Role models—Less than half of Americans and Europeans said the wealthy set an important example to others to be successful, compared with 71% of Latin Americans and 61% of Asians.

Spending —Wealthy Europeans were more likely to spend their money on travel and home decoration. LatinAmericans seemed to put the highest spending on education, while Americans' spending in charity (慈善) was much more than the rich in any other area of the world.

25. According to the passage, which continents belong to the emerging markets?

A. Europe and America.

B. Europe and South America.

C. Asia and Latin America.

D. Asia and America.

26. People generally hold the opinion that humans seek wealth to _____.

A. gain respect from others

B. enjoy power and free choices offered by wealth

C. wish for happiness

D. show off and gain rights

27. Which of the following might the writer not agree with?

A. Most rich people in the survey agreed wealth was a reward for their hard work

B. Wealth had a greater happinessinfluence on the rich in Asia and Latin America.

C.Wealthy Latin Americans were more likely to spend money on travel and home decoration.

D. Nearly half of the rich in emerging markets regarded respect as a byproduct of wealth.

28. What does the passage mainly talk about?

A. Happiness lies in wealth.

B. Wealth brings happiness, respect and admiration.

C. People seek wealth to enjoy life.

D. Wealth is translated differently around the world.

C

With online courses (课程), anyone can gain knowledge in any field of interest for free. You can educate yourselfand get a certificate after finishing the course.

Coursera

It offers high-quality courses from top universities for free to everyone to improve your resume (履历), advance your career, expand your knowledge, and gain your confidence. This online learning websiteprovides courses from Princeton University, Stanford University, University of California, and University of Pennsylvania. Learn more at https://https://www.360docs.net/doc/1e14546141.html,.

Udemy

Its goal is to promote education by enabling anyone to learn online. It seeks to hugely change education byinviting millions of experts worldwide to teach and share what they know. Whether you want to learn business, arts, health, music or technology, there is a course for you. Learn more at https://https://www.360docs.net/doc/1e14546141.html,.

iTunes U

If you are a student who uses Apple devices (设备), you will be happy to know that you have access to iTunes U, which gives you access to different educational coursesfrom all leading universities for free! Learn more at https://https://www.360docs.net/doc/1e14546141.html,.

Skillfeed

If you hope to learn a new skill, or improve your Photoshop skills, it offers unlimited access to high-quality video courses from a worldwide community of instructors. You have a month’s free trial, after which you will pay a monthly fee to gain unlimited access to all courses. Learn more at https://https://www.360docs.net/doc/1e14546141.html,.

UC Berkeley

It offers courses in Japanese, legal studies and public health. Since they are recordings ofactual lectures, they are short of lecture notes and extra materials. However, each course has audio(声音的) recordings of lectures through iTunes U or video recordings of lectures through YouTube. Learn more at https://https://www.360docs.net/doc/1e14546141.html,.

29. What do Coursera and iTunes U have in common?

A. They’re aimed at providing career guidance.

B. Experts worldwide willgive lectures on them.

C. Learners take their courses only by using apple devices.

D. They provide free courses from top universities.

30. Which of the following asks for money for offering courses all the time?

A. Udemy.

B. Skillfeed.

C. Coursera.

D.UC Berkeley.

31. The main purpose of this text is to_____.

A. to show how to get a certificate online

B. to advertise some courses from top universities

C. to introduce some websites to people to study online

D. to develop education by asking people to learn online

D

Scientists have always been interested in the high level of organization in ant societies.American researchers have watched ants build life-saving rafts to keep afloat (飘浮的) during floods. They also have recordedhow ants choose their next queen—the female whose job is to produce eggs.

New technology is helping to improve researchers’ understanding of the insects. But there is still a lot to be learned.

Fire ants living in Brazilian forests are perfectly at home in an environment where flooding is common. To save themselves, the insects connect their legs together and create floating rafts. Some ant rafts can be up to 20 centimeters wide.

David Hu is an engineer with the Georgia Institute of Technology, also known as Georgia Tech, saying, "If you have100 ants, which means 600 legs, 99 percent of those legs will be connected to a neighbor. So they're very, very good at keeping this network. "

David Hu and other Georgia Tech researchers wanted to study ants and the secret of their engineering. They froze antrafts and then looked at them with the help of computed technology, or CT images.The pictures showed that larger ants serve in central positions to which smaller ants hold. The larger ants create pockets of air that keep the insects afloat

Scientists say small robots or materials that can change shape could be programmed in a similar way, working towardsa shared goal.

Researchers at North Carolina State University are also studying ants. They examined how Indian jumping ants choose the leader of the colony when they lose their top female or queen.

32. The author takes fire ants as an example to tell us _____.

A. how ants seek food

B. how ants survive

C. how ants communicate

D. how ants live together

33. What can we know from what David Hu said?

A. Ants know the way to join together closely.

B. Ants know the way to keepsafe in the river.

C. Ants know the way to look for each other.

D. Ants know the way to build a largeraft.

34. Why did the larger ants serve in central positions in their ant rafts?

A. To stress their importance.

B. To protect themselves.

C. To fight against their enemies.

D. To defend the queen

35. What ideas do the ants give us according to the passage?

A. We can use similar-shaped machines in flooding areas.

B. We can combine small robots or materials into larger ones.

C. Small and shape-changeable things might work just like ants do.

D. Small robots or materials in the shape of ants can be made.

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。

Nearly everyone has spent at least one night lying in bed wishing for sleep. But for many, it's a nightly struggle. The key, or secret, is to experiment. What works for some might not work as well for others. 36

Set a regular bedtime. Go to bed at the same time every night. 37 Try not to break this routine on weekends when it may be attractive to stay up late. If you want to change your bedtime, help your body adjust (调整).

38 If you're getting enough sleep, you should wake up on time naturally without an alarm. As with your bedtime, try to keep your regular wake-up time even on weekends.

Be smart about napping (打盹). Though taking a nap can be a great way to become energetic again, especially for older adults, it can make insomnia (失眠) worse. 39 If you must nap, do it in the early afternoon, and limit it to thirty minutes.

Fight after-dinner drowsiness( 睡意). What should you do when getting sleepy before your bedtime? 40 For example, washing the dishes, or calling a friend. If you give in to the drowsiness, you may wake up later in the night and have difficulty getting back to sleep.

A. Wake up at the same time every day.

B. Spend more time outside in the day time.

C. When it's time to sleep, make sure the room is dark.

D. Get off the couch and do something to avoid falling asleep.

E. If insomnia is a problem for you, consider giving up napping.

F. It's important to find the sleep methods that work best for you.

G. Choose a time when you normally feel tired so that you can fall asleep easily.

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。

I visited the Miss Bee's a couple of times a week that summer. Sometimes she gave me less change. Other times she 41 me more for what I bought,or sold me a(n) 42 newspaper instead of one that was new. Going to the 43 was more like going into battle.

"That can of beans is only twenty-nine cents!" I 44 her one afternoon. I had watched 45 the numberschange on the cash register (现金出纳机), and Miss Bee had 46 35 cents. She didn’t seem embarrassed that I had 47 herovercharging (making sb pay too much for sth). She just looked at me over her glasses and fixed the 48 .

All 49 long she found ways to tripme up. No sooner had I learned how to pronounce bicarbonateof soda (小苏打) and memorized its 50 on the shelf, than Miss Bee rearranged (重新布置) the shelves and made me 51 for it all over again. One morning I was to return to Brooklyn, I 52 to get a packet of gum (口香糖).

"All right, Miss Potential," she said." What did you 53 this summer? I believe my job is to teach every childI meet life 54 to help them. 55 you get older, you will be glad that our paths crossed!"

Until one day my 56 came to me with homework problems. "They're too hard," she said. "Could you finish mymath problems for me?"

"If I 57 them for you how will you ever learn to do it yourself?" I said. 58 , I was back at that general store where I had learned the hard way to check up my 59 along with the cashier.As my daughter went backto herhomework, I 60 : had Miss Bee really taught me something all those years before?

41. A. supplied B. charged C. offered D. afforded

42. A. old B. new C. local D. foreign

43. A. center B. office C. store D. market

44. A. advised B. promised C. warned D. corrected

45. A. strictly B. closely C. patiently D. immediately

46. A. added B. stolen C. saved D. put

47. A. seen B. caught C. felt D. admitted

48. A. attitude B. money C. method D. price

49. A. spring B. summer C. autumn D. winter

50. A. source B. quality C. location D. direction

51. A. look B. pay C. call D. fight

52. A. got on B. stopped in C. took off D. put up

53. A. find B. meet C. know D. learn

54. A. lessons B. values C. meanings D. troubles

55. A. If B. When C. Because D. Though

56. A. baby B. son C. daughter D. sister

57. A. create B. solve C. follow D. share

58. A. Frequently B. Luckily C. Clearly D. Suddenly

59. A. bill B. data C. log D. list

60. A. asked B. wondered C. realized D. doubted

第二节:单项填空(共10小题;每小题1分,满分10分)

61. Take your time — it's just _____ short distance from here to _____ restaurant.

A. /; the

B. a; the

C. the; a

D. /; a

62.—Will you show me how to download these songs?

—Press “Enter” and follow the on-screen _____.

A. information

B. instructions

C. equipment

D. descriptions

63. This restaurant wasn't _____ the restaurant we went to last week.

A. half as good as

B. as half good as

C. as good as half

D. good as half as

64.I’m glad to learn that his attitude _____ this plan is similar _____ mine.

A. to; with

B. towards; as

C. to; to

D. about; in

65. —Johnson is indeed a wise man.

—Oh, yes. How often I have regretted _____ his advice!

A. to take

B. taking

C. not to take

D. not taking

66. —Hey! What's the rush?

—The plane________at 4:00 and I need to see my uncle off.

A. will take off

B. takes off

C. has taken off

D. took off

67. We were _____ at the news that our football team had lost the match.

A. astonished

B. astonishing

C. excited

D. exciting

68. —What was the party like?

—Wonderful. It is years _____ I enjoyed myself so much.

A. after

B. when

C. before

D. since

69. Many things _____ impossible in the past are very common today.

A. consider

B. considered

C. considering

D. to consider

70. —How about going for a picnic this weekend?

—Why not? _____.

A. I’ve got that

B. It’s up to you

C. That’s settled

D. Have a good time

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。

During national holidays, famous landmarks and tourist 71 (attract) in China are usually very crowded. Forexample, in Beijing the Forbidden City often 72(become)overcrowded with tourists,

so people can hardly enjoy themselves. Because of this, some tourists might get 73 bad impression of these places.

In order to deal 74 this situation, it could be best for people 75 (lower) their expectations (期望) of a perfect visit— it c an’t be avoided that there will be a lot of t ourists 76 you visit places of interest.This problem can 77(solve) if people visit different places. Besides, it's 78 (possibility) that we avoid this overcrowding by 79(choose) to visit famous places during the year's off season (淡季). You could also visit 80 (equal) interesting but less known places instead.

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。

Nowadays, the Internet develops very fast that it has become really popular. Some students regarded it as a great helper. Because there has a lot of information online, they can surf the Internet for any information in a short time. This is also very easy to talk with others by using the Internet. Therefore, other students think there is some online information what is not good for students. Besides, spend too much time playing games will not only have a bad effect on their studies but also do harm for health. I think we should make properly use of the Internet. It is of great important to separate good plants from wild weeds.

第二节:书面表达(满分25分)

假如你是李华,你的澳大利亚网友Eric最近写信给你,信中说他刚进入高中后虽然学习成绩很好,但却不善于与他人交流,因此缺少朋友,经常感到很孤独。请你据此给他写一封电子邮件。内容要点如下:

1. 对他的情况表示同情;

2. 针对他的问题提出建议;

3. 相信他会走出困境。

注意:

1.词数100左右;

2.可以适当增加细节,以使行文连贯。

Dear Eric,

_______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________

Yours sincerely,

Li Hua

参考答案

听力:1-5 ACCBC 6-10 BABBA 11-15 BBABC 16-20 AACBC

阅读理解:21-24 CDCB 25-28CBCD 29-31DBC

32-35 BABC 36-40FGAED

完形填空:41-45 BACDB 46-50 ABDBC 51-55 ABDAB 56-60 CBDAB

单项填空:61-65 BBACD 66-70 BADBC

语法填空:71. attractions 72. becomes 73.a 74. with 75. to lower

76. when/while 77. be solved 78.possible 79. choosing 80.equally

短文改错:

第一处. … develops very fast… very—so

第二处. …regarded it… regarded—regard

第三处. …there has a lot of…has—is

第四处.…This is also… This—It

第五处. Therefore, other…Therefore—However

第六处. …information what…what—that/which

第七处. …spend too much… spend—spending

第八处. …do harm for…for —to

第九处.… make properly use… properly—-proper

第十处. …of great important…important—importance

书面表达:

I’m really so rry to hear that you are feeling lonely after entering the high school.You should remember that it is very common and other students may face the same problem, so don't worry too much.

Here is my advice for you. You canjoin astudy club, which I think will be of helpto meet new friends,because common hobbies are the basis of making friends. Besides, I advise you to help others when they are in trouble, and ask them to help you when you have difficulty. After all, friendships start with communication.

I hope these will help you to make more friends. I’m m convinced that you will get out of the trouble.

2017-2018学年度黑龙江省大庆铁人中学第一学期高二期末考试试卷与答案

{正文} 2017-2018学年度黑龙江省大庆铁人中学第一学期高二期末考试 英语试题 答题时长(分钟):120 分值:150分 第Ⅰ卷 第一部分:基础知识考查(每小题1.5分,共20小题, 满分 30 分) 1. 2.The students find it difficult to_________ to the new school. 3.We _________ to help you give up smoking. 4.The boys _________ each other because they both have golden hair and round faces. 5. 6.I want to apply for a _________ job as a waiter. 7.In an _________ world there would be no need for a police force. 8.I am very _________ to all those who took the trouble to write to me. 9. 10.He was seriously hurt and a doctor_________ an operation on him. 11.The black people were no longer bought and sold as slaves after the slave trade was _________. 12.The government is being widely _________ for failing to limit air pollution. home.

(新)湖南省衡阳市2017_2018学年高一英语上学期期中试题

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黑龙江省大庆铁人中学2014-2015学年高一下学期期中考试生物试题 Word版含答案

大庆铁人中学2014-2015学年度下学期高一期中考试题 试题2015.5 一、选择题(共30题,每题1分) 1.下列关于ATP和酶的叙述中不正确的是() A.人体内的酶也在不断更新 B.放能反应一般与ATP的合成相联系,释放的能量储存在葡萄糖中 C.ATP中的能量可来自光能和化学能,也可转化为光能和化学能 D.在有氧与缺氧的条件下,细胞质基质都能形成ATP 2.下列选项符合右图示含义的是() A.pH从5升高到7,酶的活性逐渐降低 B.pH从5升高到7,酶的最适温度不变 C.温度从0→A变化过程中,酶的活性逐渐降低 D.该酶的最适pH为7 3.右图表示某绿色植物的非绿色器官在氧浓度为a、b、c、 d时,CO2释放量和O2吸收量的变化。下列相关叙述正确的是 () A.氧浓度为a时,最适于储藏该植物器官 B.氧浓度为b时,无氧呼吸最弱 C.氧浓度为c时,无氧呼吸消耗的葡萄糖是有氧呼吸的1.5倍 D.氧浓度为d时,无氧呼吸与有氧呼吸强度相等 4.在人和植物体内部会发生的物质转化过程是①葡萄糖彻底氧化②葡萄糖转化为乙醇③葡萄糖脱水缩合④葡萄糖分解为丙酮酸 A.①②③ B.②③④ C.①③④ D.①②④ 5.右图示叶绿体的亚显微结构示意图,有关说法不正确的是() A.1与2均有选择透过性 B.与光合作用有关的酶全都分布在3上 C.光反应是在3上进行的 D.暗反应是在4中进行的 6.下列关于[H]的叙述,不正确的是() A.有氧呼吸过程中产生的[H]与氧结合生成水,释放大量的能量 B.在光合作用过程中,[H]可产生于叶肉细胞以及植物根的分生区细胞中

C.葡萄糖在细胞质基质中分解成丙酮酸,生成[H]并释放少量的能量 D.光合作用产生的[H]在暗反应中用于还原C3 7.关于光合作用和化能合成作用的叙述,正确的是() ①与异养生物有关②都将CO2和水合成为有机物③都属自养生物的营养方式④合成有机物所利用能量相同 A.①② B.①③ C.②③ D.②④ 8.下列有关生物体生长的说法正确的是() A.生物体器官大小主要取决于细胞体积的大小 B.相对表面积越小,物质交换的效率越大 C.细胞核中的DNA一般不会随细胞体积增大而增多 D.多细胞生物体生长只依赖于细胞数目的增多 9.下列有关细胞生命历程的说法错误的是() A.细胞衰老,细胞内的色素逐渐减少 B.细胞分化,细胞核内的遗传物质没有发生改变 C.细胞癌变,细胞膜上的糖蛋白减少 D.细胞凋亡,相关基因活动加强,有利于个体的生长发育 10. 关于细胞全能性的理解不确切的是() A.动物细胞培养获得大量细胞,证明了动物体细胞也具有全能性 B.细胞内含有个体发育所需的全部遗传物质是细胞具有全能性的内在因素 C.经植物组织培养得到的试管苗,是植物细胞在一定条件下表现全能性的结果 D.大量的科学事实证明,高度分化的植物体细胞仍具有全能性 11.下列是关于细胞分裂过程中细胞内变化的叙述,能正确表示一个细胞周期内分裂过程的顺序是() ①两个相同DNA分子完全分开②出现放射状排列的细丝③中心体发生倍增④着丝点排列在一个平面上 A.②→③→①→④ B.②→④→③→① C.③→②→④→① D.②→③→④→① 12.关于细胞有丝分裂过程中的说法正确的是() A.细胞中的每一条染色体都只含一个DNA分子 B.姐妹染色单体分开后就成为两个染色体 C.一对染色体复制以后的结果是四条染色体 D.分裂后期染色单体:染色体:DNA=2:1:2

黑龙江省大庆铁人中学机械能守恒定律检测题(WORD版含答案)

一、第八章 机械能守恒定律易错题培优(难) 1.如图所示,一根轻弹簧一端固定于O 点,另一端与可视为质点的小滑块连接,把滑块放在倾角为θ=30°的固定光滑斜面上的A 点,此时弹簧恰好水平。将滑块从A 点由静止释放,经B 点到达位于O 点正下方的C 点。当滑块运动到B 点时弹簧与斜面垂直,且此时弹簧恰好处于原长。已知OB 的距离为L ,弹簧始终在弹性限度内,重力加速度为g ,则滑块由A 运动到C 的过程中( ) A .滑块的加速度先减小后增大 B .滑块的速度一直在增大 C .滑块经过B gL D .滑块经过C 2gL 【答案】BC 【解析】 【分析】 【详解】 AB .弹簧原长为L ,在A 点不离开斜面,则 sin 3( )sin c 3300os 0L k mg L ?≤-? ? 在C 点不离开斜面,则有 ( )cos30cos30cos30L k L mg -?≤?? 从A 点滑至C 点,设弹簧与斜面夹角为α(范围为30°≤α≤90°);从B 点滑至C 点,设弹簧与斜面的夹角为β,则 2sin 30cos mg kx ma β?-= 可知下滑过程中加速度一直沿斜面向下且减小,选项A 错误,B 正确; C .从A 点滑到B 点,由机械能守恒可得 21cos302 p B mgL E mv ?+= 解得 2cos302 32 p p B E E v gL g m g L L m ?+=+=>选项C 正确; D .从A 点滑到C 点,由机械能守恒可得 2 1cos302 P C L mg E mv '+=?

43 222 2 cos303 p p C gL E E L v g gL m m ' =+> + ? = 选项D错误。 故选BC。 2.如图所示,质量为1kg的物块(可视为质点),由A点以6m/s的速度滑上正沿逆时针转动的水平传送带(不计两转轮半径的大小),传送带上A、B两点间的距离为8m,已知传送带的速度大小为3m/s,物块与传送带间的动摩擦因数为0.2,重力加速度为2 10m/s。下列说法正确的是() A.物块在传送带上运动的时间为2s B.物块在传送带上运动的时间为4s C.整个运动过程中由于摩擦产生的热量为16J D.整个运动过程中由于摩擦产生的热量为28J 【答案】BD 【解析】 【分析】 【详解】 AB.滑块先向右匀减速,根据牛顿第二定律有 mg ma μ= 解得 2 2m/s a g μ == 根据运动学公式有 01 0v at =- 解得 1 3s t= 匀减速运动的位移 1 06 3m9m8m 22 v x t L + ==?== > 物体向左匀加速过程,加速度大小仍为2 2m/s a=,根据运动学公式得物体速度增大至2m/s v=时通过的位移 22 1 2 m1m 222 v x a === ?

浙江湖州市2016-2017学年高一英语下学期期中试题

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