2017年高考试卷及答案全国卷一_2017高考b卷答案

1.浙江卷高考英语真题及答案(word精校版)(3)

2.2017年高考英语全国卷1 - 阅读理解B

3.2017年成人高考语文试题与答案(2)

4.2017年数学高考卷子的六道大题

　考生能否在英语科考试中取得高分取决于阅读理解的成绩。一起做一下阅读理解训练吧。下面是我为大家推荐的2017高考英语真题分类汇编阅读理解真题及答案，仅供大家参考!

　2017高考英语真题分类汇编阅读理解真题及答案一

　In one way of thinking, failure is a part of life. In another way, failure may be a way towards success. The ―spider story‖ is often told. Robert Bruce, leader of the Scots in the 13th century, was hiding in a cave from the English. He watched a spider spinning a web(蜘蛛织网). The spider tried to reach across a rough place in the rock. He tried six times without success. On the seventh time he made it and went on to spin his web. Bruce is said to have taken heart and to have gone on to defeat the English? Edison, the inventor of the light bulb, made hundreds of models that failed before he found the right way to make one.

　So what? First, always think about your failure. What caused it? Were conditions right? Were you in top from yourself? What can you change so things will go right next time?

　Second, is the goal(目标)you're trying to reach the right one? Try to do some thinking about what your real goals may be. Think about his question, ?If I do succeed in this, where will it get meThis may help you prevent failure in things you shouldn't be doing anyway.

　The third thing to bear in mind about failure is that it's a part of life. Learn to ―live with yourself‖ even though you may have failed. Remember, ―You can't win them all.‖

　1.This passage deals with two sides of failure. In paragraph 1, the author talks mainly about ______ .

　A.the value of failur B.how people would fail

　C.famous failures　D.the cause of failure

　2.The underlined phrase?made it?means ______ .

　A.succeeded B.failed C.gave D.got

　3.The lesson the spider taught Robert Bruce seems ______ .

　A.productive　B.straight forward C.sorrowful D.deep

　4.The author tells you to do all things except ______ .

　A.The think about the cause of your failure

　B.to check out whether your goals are right for you

　C.to consider failure as a part or life

　D.to bear in mind that you will never fail in your life

　5.Which of the following is NOT true?

　A.Bruce and Edison were successful examples. B.Failure may be regarded as a way toward success.

　C.Edison learned a lot from the lesson the spider taught Robert Bruce.

　D.One may often raise a question whether his goals are worth attempting.

　2017高考英语真题分类汇编阅读理解真题及答案二

　In sport the sexes(性别)are separate. Women and men do not run or swim in the same races. Women are less strong than men. That at least is what people say. Women are called the weaker sex, or, if men want to please them, the fair sex. But boys and girls are taught together at schools and universities. There are women who are famous Prime Ministers, scientists and writers. And women live longer than men . A European woman can expect to live until the age of 74, a man only until he is 68.Are women's bodies really weaker?

　The fastest men can run a mile in under 4 minutes. The best women need 4.5 minutes. Women's time are always slower than men's, but some facts are a surprise. Some of the fastest women swimmers today are teenage girls. One of them swam 400 metres in 4 minutes 21.2 seconds when she was only 16.The first?Tartan?in film was an Olympic swimmer, Johnny Weissmuller. His fastest 400 metres was 4 minutes 49.1 seconds, which is 37.9 seconds slower than a girl 50 years later! This does not mean that women are catching men up. Conditions are very different now and sport is much more serious. It is so serious that some women athletes are given hormone (荷尔蒙)injections(注射). At the Olympics a doctor has to check whether the women athletes are really women or not. It seems sad that sport has such problems. Life can be very complicated(复杂的) when there are two separate sexes!

　1.Women are called the weaker sex because ______ .

　A.women do as much as men

　B.people think women are weaker than men

　C.sport is easier for men than for women

　D.in sport the two sexes are always together

　2.Which of the following is true?

　A.Boys and girls study separately everywhere. B.Women do not run or swim in races with men.

　C. Famous Prime Ministers are women .

　D.Men can expect to live longer than women in Europe.

　3.?That at least is what people say?means people ______ .

　A.say other things , too

　B.don't say this much

　C.say this but may not think so

　D.only think this

　4.What problems does sport have?

　A.Some women athletes are actually men.

　B.Some women athletes are give hormone injections. C.Women and men do not run or swim in the same races.

　D.It is difficult to check whether women athletes are really women.

　5.In this passage the author implies that ______

　A.women are weaker than wen , but faster

　B.women are slower than men, but stronger

　C.men are not always stronger and faster than women

　D.men are faster and stronger than women

　答案：BBCBC

　2017高考英语真题分类汇编阅读理解真题及答案三

　People bury treasure to stop other people from taking it. They choose a quiet place, dig a deep hole and bury the treasure in it. Then they make a map of where the treasure is or write down other clues(线索)that will help them or someone else to find it again.

　In Britain a few years ago; a writer wrote about some treasure that he had buried. He put clues in the story to help readers find it. Thousands of people hunted for the treasure. They dug holes all over Britain, hoping to find it.

　One of the most popular adventure stories ever written is Robert Louis Stephenson's ?Treasured Island?, an exciting story about a young boy, Jim Hawkins, who is captured by pirates and later finds some buried treasure.

　Then there is the true story about a man who had to travel overseas for a year. He did not trust banks, so he buried his life savings in a park. Then he went away. On his return, he went straight to the park. But the park was no longer there. In its place there was a huge building.

　And then there was the man who buried his savings, all in bank notes, in a waterproof(防水的) bag. When he dug it up years later, there was nothing left. Worms and insects had eaten the bag and everything in it.

　And of course, these are stories about people who bury things and either forget where they have buried them or lose the map.

　Although it is true that people sometimes lose their money because a bank fails, banks are still the safest place to keep our savings and treasures.

　1.People who bury treasure usually

　A.do not trust banks

　B.have a little money .

　C.want to live in a quiet place.

　D.expect to lose it

　2.The writer in Britain

　A.really had buried something.

　B.started a nationwide treasure hunt.

　C.had lost his treasure and wanted people to help him find it.

　D.caused trouble because people dug holes everywhere.

　3.―Treasure Island‖

　A.is a story about pirates.

　B.is about the adventures of Jim Hawkins.

　C.is the most popular story ever written

　D.is a well-known fairy tale.

　4.The man who buried his money in a park

　A.thought his money was safer there than in a bank.

　B.travelled on the sea for a year.

　C.got his life savings back again.

　D.stayed away longer than he expected.

　5 . From these stories we understand that

　A.we cannot trust banks.

　B.we should not trust anyone.

　C.a waterproof bag is not proof against worms and insects.

　D.insects eat anything.

　答案：ABBAC

浙江卷高考英语真题及答案(word精校版)(3)

高考英语词汇详解：persuade陷阱题解析

persuade是“说服”还是“设法说服”呢?请看题：

I _____ him not to go abroad, but he wouldn’t listen.

A. persuaded B. tried to persuade

C. have persuaded D. was persuaded

陷阱 容易误选A。

分析 正确答案为B。persuade 的真正意思是“说服”，而不是“设法说服”，要表示后者的意思英语应用 try to persuade 。如：

Who persuaded you to join the club? 谁劝说好你参加这个俱乐部的?

The salesman persuaded us to buy his product. 推销员劝说好我们购买他的产品。

I couldn’t persuade him to change his mind. 我没法劝说他改变主意。

The salesman persuaded us to buy his product. 推销员说服我们买了他的产品。

Who persuaded you to join the society? 谁劝说你参加这个协会的?

Try as I would, I could not persuade him to give up the idea. 尽管我努力这样做，我却没能劝说他放弃这个想法。

He tried to persuade him to change his mind. 他设法劝说他改变主意。

I want to persuade her to overseas with me. 我想劝说她跟我到海外去。

类似地：

kill 的意思是“杀死”，不表示“设法杀死”，要表示后者的意思英语用 try to kill。

prevent 的意思是“阻止”，不表示“设法阻止”，要表示后者的意思英语用 try to prevent。

2017年高考英语全国卷1 - 阅读理解B

第三部分 语言运用(共两节，满分45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A、B、C和D四个选项中，选出可以填入空白处的最佳选项，并在答题纸上将该项涂黑。

　Alia Baker is a librarian in Iraq. Her library used to be a 36 place for all who loved books and liked to share knowledge. They 37 various matters all over the world. When the war was near, Alia was 38 that the fires of war would destroy the books, which are more 39 to her than mountain of gold. The books are in every language ? new books, ancient books, 40 a book on the history of Iraq that is seven hundred years old. (kaoshi.yjbys.com)

　She had asked the for 41 to move the books to a 42 place, but they refused. So Alia took matters into her own hands. 43 , she brought books home every night, 44 her car late after work. Her friends came to 45 her when the war broke out. Anis who owned a restaurant 46 to hide some books. All through the 47 , Alia, Anis, his brothers and neighbours took the books from the library, 48 them over the seven-foot wall and 49 them in the restaurant. The books stayed hidden as the war 50 . Then nine days laters, a fire burned the 51 to the ground.

　One day, the bombing stopped and the 52 left. But the war was not over yet. Alia knew that if the books were to be safe, they must be 53 again while the city was 54 . So she hired a truck to bring all the books to the houses of friends in the suburbs(郊区). Now Alia waited for the war to end and 55 peace and a new library.

　36. A. meeting B. working C. personal D. religious

　37. A. raised B. handled C. reported D. discussed

　38. A. worried B. angry C. doubtful D. curious

　39. A. practical B. precious C. reliable D. expensive

　40. A. then B. still C. even D. rather

　41. A. permission B. confirmation C. explanation D. information

　42. A. large B. public C. distant D. safe

　43. A. Fortunately B. Surprisingly C. Seriously D. Secretly

　44. A. starting B. parking C. filling D. testing

　45. A. stop B. help C. warn D. rescue

　46. A. intended B. pretended C. happened D. agreed

　47. A. war B. night C. building D. way

　48. A. put B. opened C. passed D. threw

　49. A. hid B. exchanged C.burnt D. distributed

　50. A. approached B. erupted C. continued D. ended

　51. A. restaurant B. library C. city D. wall

　52. A. neighbours B. soldiers C. friends D. customers

　53. A. sold B. read C. saved D. moved

　54. A. occupied B. bombed C. quiet D. busy

　55. A. dreamed of B. believed in C. cared about D. looked for

非选择题部分 　第三部分 语言运用(共两节，满分45分)

　第二节(共10小题：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。

　Last October , while tending her garden in Mora , Sweden , Lena Pahlsson pulled out a handful of small 56 (carrot) and was about to throw them away. But something made her look closer , and she noticed a 57 (shine) object. Yes, there beneath the leafy top of one tiny carrot was her long-lost wedding ring.

　Pahlsson screamed 58 loudly that her daughter came running from the house. ?she thought I had hurt 59 (I),?says Pahlsson

　Sixteen years 60 (early), Pahlsson had removed the diamond ring 61 (cook) a meal. When she wanted to put the ring back on later, it was gone. She suspected that one of her three daughters ?then ten, eight, and six? had picked it up, but the girls said they hadn't. Pahlsson and her husband 62 (search) the kitchen, checking every corner, but turned up nothing. ?I gave up hope of finding my ring again," she says. She never replaced it.

　Pahlsson and her husband now think the ring probably got 63 (sweep) into a pile of kitchen rubbish and was spread over the garden, 64 it remained until the carrot?s leafy top accidentally sprouted (生长) through it. For Pahlsson, its return was 65 wonder.

第四部分 写作(共两节，满分40分)

　第一节 应用文写作(满分15分)

　假定你是李华，计划组织一次郊游，请给你的英国朋友Chris写封邮件邀请他参加。内容包括：

　1. 参加者;

　2. 时间、地点;

　3. 活动：登山、野餐等。

　注意：

　1. 词数80左右;

　2. 可以适当增加细节，以使行文连贯。

　第二节 读后续写(满分25分)

　阅读下面短文，根据所给情节进行续写，使之构成一个完整的故事。

　On a bright, warm July afternoon, Mac Hollan, a primary school teacher, was cycling from his home to Alaska with his friends. One of his friends had stopped to make a bicycle repair, but they had encouraged Mac to carry on, and they would catch up with him soon. As Mac pedaled (骑行) along alone, he thought fondly of his wife and two young daughters at home. He hoped to show them this beautiful place someday.

　Then Mac heard quick and loud breathing behind him. ?Man, that's a big dog!? he thought. But when he looked to the side, he saw instantly that it wasn?t a dog at all, but a wolf, quickly catching up with him.

　Mac?s heart jumped. He found out his can of hear spray. With one hand on the bars, he fired the spray at the wolf. A bright red cloud enveloped the animal, and to Mac's relief, it fell back, shaking its head. But a minute later, it was by his side again. Then it attacked the back of Mac's bike, tearing open his tent bag. He fired at the wolf a second time, and again, it fell back only to quickly restart the chase(追赶)。

　Mac was pedaling hard now. He waved and yelled at passing cars but was careful not to show down. He saw a steep uphill climbbefore him. He knew that zxxk once he hit the hill, he?d be easy caught up and the wolf?s teeth would be tearing into his flesh.

　At this moment, Paul and Beeky were driving their car on their way to Alaska. They didn?t think much of it when they saw two cyclists repairing their bike on the side of the road. A bit later, they spotted what they, too, assumed was a dog running alongside a man on a bike. As they got closer, they realized that the dog was a wolf. Mac heard a large vehicle behind him. He pulled in front of it as the wolf was catching up fast, just a dozen yards away now. (kaoshi.yjbys.com)

　注意：

　1. 所续写短文的词数应为150左右;

　2. 应使用5个以上短文中标有下划线的关键词语;

　3. 续写部分分为两段，每段开头语已为你写好;

　4. 续写完成后，请用下划线标出你所使用的关键词语。

参考答案

　第一部分 听力

　1. C 2. A 3. C 4. B 5. A

　6. C 7. A 8. B 9. C 10 . B

　11. B 12. C 13. A 14. B 15. A

　16. B 17. C 18. A 19. C 20 . A

　第二部分 阅读理解

　21. C 22. D 23. B 24. D 25. A

　26. C 27. B 28. A 29. B 30. C

　31. D 32. C 33. B 34. A 35. F

　第三部分 语言运用

　36. A 37. D 38. A 39. B 40. C

　41. A 42. D 43. D 44. C 45. B

　46. D 47. B 48. C 49. A 50. C

　51. B 52. B 53. D 54. C 55. A

　56. carrots 57. shiny/shining 58. so

　59. myself 60. earlier 61. to cook

　62. searched 63. Swept 64. where

　65. a

　第四部分 写作

　(略)

更多2017年高考英语真题分享阅读：

2017年成人高考语文试题与答案(2)

I work with Volunteers for Wildlife, a rescue and education organization at Bailey Arboretum in LocustValley. Trying to help injured, displaced or sick creatures can be heartbreaking; survival is never certain. However, when it works, it is simply beautiful.

我在“野生动物志愿者”组织工作，这是蝗虫谷贝利植物园的一个援救教育组织，帮助受伤、流离失所或生病的动物。这样的工作可能会令人心碎；因为无法确定动物是否能活下来。然而，当救援起作用时，这种感觉真的很棒！

I got a rescue call from a woman in Muttontown. She had found a young owl on the ground. When I arrived, I saw a 2-to 3-week-old owl. It had already been placed in a carrier for safety.

我接到马特顿镇一位女士的求救电话，她在地上发现了一只猫头鹰幼鸟。当我到达时，我看见了一只两三周大的猫头鹰。为了安全起见，它已经被放在一辆大货车上。

I examined the chick and it seemed fine. If I could locate the nest, I might have been able to put it back, but no luck. My next work was to construct a nest and anchor it in a tree.

我检查了这只幼鸟，看起来还不错。如果我能找到鸟巢，我也许能把它放回去，但没那么幸运。接下来的工作就是建造一只鸟巢，并固定在一棵树上。

The homeowner was very helpful. A wire basket was found. I put some pine branches into the basket to make this nest safe and comfortable. I placed the chick in the nest, and it quickly calmed down.

房主非常乐于助人，给我找来了一只铁丝篮。为了让鸟巢安全舒适，我把一些松枝放进铁丝篮里，然后我把小猫头鹰放进鸟巢里，它很快安静了下来。

Now all that was needed were the parents, but they were absent. I gave the homeowner a recording of the hunger screams of owl chicks. These advertise the presence of chicks to adults; they might also encourage our chick to start calling as well. I gave the owner as much information as possible and headed home to see what news the night might bring.

现在最需要的是这只小猫头鹰的父母，但它们不在。我给了房主一份小猫头鹰饥饿尖叫声的录音。这些录音会让猫头鹰父母知道小猫头鹰的存在，也会鼓励小猫头鹰学着尖叫。我把尽可能多的消息告诉了房主，然后回家，看看晚上会有什么情况。

A nervous night to be sure, but sometimes the spirits of nature smile on us all! The homeowner called to say that the parents had responded to the recordings. I drove over and saw the chick in the nest looking healthy and active. And it was accompanied in the nest by the greatest sight of all — LUNCH！The parents had done their duty and would probably continue to do so.

这的确是一个紧张的夜晚，但有时大自然的神灵会眷顾我们！房主打电话说小猫头鹰的父母已经对这些录音做出了回应。我开车过去，鸟巢里的小猫头鹰看起来健康又活泼。鸟巢里出现了最令人感动的一幕——小猫头鹰的身边全是午餐！它的父母已经在尽职尽责，而且很可能会继续这样做。

2017年数学高考卷子的六道大题

　我们精心为广大考生准备了?2017年成人高考语文模拟试题与答案(2)?，各位同学赶快学起来吧，做好万全准备，祝各位同学考试顺利通过。更多相关资讯请持续关注

　 一、语言知识与语言应用(共24分，每小题4分)

　第1题单选 依次填人下列各句横线处的词语，最恰当的一项是(　　)

　①他把__________家里受苦的情况都讲了出来。

　②鲁迅主编的刊物__________当局查封了。

　③__________是否应聘，我还没有做出最后决定。

　A.从 让 至于

　B.在 让 关于

　C.从 被 关于

　D.在 被 至于

　参考答案：D

　第2题单选 下列各句中，加点的成语使用正确的一项是(　　)

　A.多次推迟销毁日期后，运行了15年之久的俄罗斯?和平?号空间站终于在2001年3月寿终正寝。

　B.中国女子柔道选手袁华在人声鼎沸的赛场上能做到充耳不闻、心静如水，而一旦发力，就令对手不寒而栗。

　C.田先生生气了，涨红了脸说道：?你们说的都是杯弓蛇影，纯属无中生有，完全不符合事实。?

　D.汉字构词能力强，掌握了常用字有利于理解词语，其中很多词可以望文生义，望文知义，易学易记。

　参考答案：A

　第3题单选 下列各组词语中，字形、词义解释全都正确的一项是(　　)

　A.荣膺众望所归(众人所敬仰的) 瞻顾韦编三绝(读书刻苦勤奋)

　B.端倪(事情的眉目) 高山流水(路途艰险难行) 附庸 各行其事

　C.表帅 曾经沧海(曾经有过辉煌的过去) 涵养席不暇暖(奔走忙碌，没有坐定的时间)

　D.缄口(闭口不说话) 大家风范(人们学习的榜样) 报歉 不可企及

　参考答案：A

　第4题单选 下列各句中加下划线的成语的使用，恰当的一句是(　　)

　A.现在的电视连续剧，十几集、几十集的习以为常。

　B.这次在浦东的参观尽管浮光掠影，但是仍然留下了深刻的印象。

　C.他俩同窗八载，一直是相敬如宾，从来没有为琐事吵过架。

　D.?新的文化观念?日趋多元化，常常让我们莫衷一是。

　参考答案：D

　第5题单选 下列句子中，没有错别字的一句是(　　)

　A.在中国现代文学史上，冰心作为倡导母爱的著名女作家而受到人们祟敬。

　B.浓郁的情韵和深刻的哲理水溶，增强了文章魅力，感染着亿万读者。

　C.广州因承诺将这次全国采购会办成非赢利的会议而获得了最多的选票。

　D.这部传记，以朴实淳厚的语言为世人展示了将军们鲜为人知的人生境遇。

　参考答案：D

　第6题单选 下列各句中，加点的成语使用正确的一句是(　　)

　A.许多看到过极光的人在描写极光时往往语焉不详，只说些?美得语言无法形容?之类的话。

　B.宽带上网是电信业的热门，但推广太慢，这是因为它的价格过高让市民叹为观止。

　C.尽管使用纯净水是否有益健康依然是人言啧啧，但纯净水进入千家万户已是不争的事实。

　D.以巴冲突愈演愈烈，美伊战争迫在眉睫，中东局势战云密布，这使许多投资者退避三舍。

　参考答案：A

　二、阅读下面文字，完成7?10题。(共16分。每小题4分)

　阅读下面的文字，完成下面试题

　树木都是比较长寿的，自然界中常有许多百年以上的大树，甚至也有上千年的古树。一般比较准确地确定古树的年龄，多用?数年轮?的办法。

　什么是年轮呢?就是木本植物茎干横断面上的同心轮纹，在树木茎干的韧皮部内侧有一圈细胞生长特别活跃，分裂也极快，能够形成新的木材和韧皮组织，被称为形成层。可以说树干的增粗全靠它的力量，这些细胞的生长情况在不同的生长季节中有明显的差异。春天到夏天的天气是最适于树木生长的，因此形成层的细胞分裂较快，生长迅速。所产生的细胞体积大，细胞壁薄，纤维较少，输送水分的导管数目多，称为春材或早材;到了秋天，由于形成层的细胞的活动逐渐减弱，产生的细胞当然也不会很大，而且细胞壁厚，纤维较多，导管数目较少，叫做秋材或晚材;当年的早材与晚材逐渐过渡，组成一轮，而晚材与次年的早材之间，界限分明，出现轮纹，根据树干基部的年轮，可以推测树木的年轮。

　但是也有一些植物，如柑橘，年轮就不符合这种规律，我们叫它?假年轮?，因为它们每一年能够有节奏地生长三次，形成三轮。此外，在热带地区的树木，由于气候季节性的变化不明显，形成层所产生的细胞也就没有什么差异了，年轮往往不明显。

　古树年轮的研究，对近年开展的古气候讨论以及空气污染情况的研究都大有助益，首先树木的生长与气象的关系最为密切，从年轮宽，生长量大，推出那一时期风调雨顺，气温适宜;反之，年轮窄，则雨水稀少或干旱无雨，或气温过高或过低。美国科学工作者通过研究450株?世界爷?的年轮，发现它所记录的近百年气候变化，竞与现有文字记录相吻合;我国兰州大学在祁连山区采集900岁以上的圆柏树，发现其年轮宽窄变化与我国近1000年的气候变化相一致。此外，采用科学手段，可以从年轮里观察出空气污染的程度，美国有人对二氧化碳及氧化物散落较多的军工厂附近的43株美国五针松及50棵鹅掌楸进行年轮分析，发现这些树木的历年生长量与该厂排放的污染物质的多少有密切关系，污染物多，树木生长量就少。

　第7题单选 下列对树木年轮的解释，最准确的一项是(　　)

　A.树木年轮就是木本植物茎干横断面上的同心轮纹。

　B.树木年轮是木本植物的主干由于季节变化生长快慢不同，在木质部的断面显出的环形纹理。

　C.在树木茎干的韧皮部内侧有一圈细胞生长特别活跃，分裂也极快，能够形成新的木材和韧皮组织，它们就是树木年轮。

　D.当年的早材与晚材逐渐过渡，组成一轮，而晚材与次年的早材之间，界限分明，出现轮纹。

　参考答案：B

　第8题单选 下列对?根据树干基部的年轮，可以推测树木的年轮?这句话的理解错误的一项是(　　)

　A.树木都是比较长寿的，自然界中常有许多百年以上甚至上千年的古树。

　B.树木茎干的韧皮部内侧的细胞在不同的季节生长情况有明显的差异。

　C.当年的早材与晚材逐渐过渡，组成一轮，而晚材与次年的早材之间，界限分明，出现轮纹。

　D.除个别植物外，大多数植物符合这种一年增长一轮的规律。

　参考答案：A

　第9题单选 下列对古树年轮研究的益处，表述不正确的是(　　)

　A.树木的生长与气象的关系最为密切，研究古树年轮可以帮助我们了解古时的气候变化。

　B.树木的生长与它附近污染物质的多少有密切关系，研究古树年轮可以帮助我们了解古时的污染程度。

　C.研究古树年轮可以帮助今人印证对过去气候变化的记录。

　D.研究古树年轮可以帮助我们预测将来的气候变化和污染情况。

　参考答案：D

　第10题单选 根据原文提供的信息，以下推断正确的一项是(　　)

　A.要想准确计算古树的年龄，一定要用?数年轮?的办法。

　B.有些植物中的?假年轮?现象，会对准确判断树木的年龄产生一些干扰。

　C.美国的?世界爷?和我国的圆柏树，它们的年轮足以证明古气候变化和空气污染 情况。

　D.从对古树年轮的研究中，可以推出美国过去有许多军工厂。

　参考答案：B

17.（12分）

△ABC的内角A，B，C的对边分别为a，b，c，已知△ABC的面积为

（1）求sinBsinC;

（2）若6cosBcosC=1,a=3,求△ABC的周长

18.（12分）

如图，在四棱锥P-ABCD中，AB//CD，且

(1)证明：平面PAB⊥平面PAD；

(2)若PA=PD=AB=DC,,求二面角A-PB-C的余弦值.

19．（12分）

为了监控某种零件的一条生产线的生产过程，检验员每天从该生产线上随机抽取16个零件，并测量其尺寸（单位：cm）．根据长期生产经验，可以认为这条生产线正常状态下生产的零件的尺寸服从正态分布N(μ,σ?)．

（1）假设生产状态正常，记X表示一天内抽取的16个零件中其尺寸在(μ–3σ,μ+3σ)之外的零件数，求P(X≥1)及X的数学期望；学科&网

（2）一天内抽检零件中，如果出现了尺寸在(μ–3σ,μ+3σ)之外的零件，就认为这条生产线在这一天的生产过程可能出现了异常情况，需对当天的生产过程进行检查．

（ⅰ）试说明上述监控生产过程方法的合理性；

（ⅱ）下面是检验员在一天内抽取的16个零件的尺寸：

9.95

10.12

9.96

9.96

10.01

9.92

9.98

10.04

10.26

9.91

10.13

10.02

9.22

10.04

10.05

9.95

经计算得，，其中xi为抽取的第i个零件的尺寸，i=1,2,…,16．

用样本平均数作为μ的估计值，用样本标准差s作为σ的估计值，利用估计值判断是否需对当天的生产过程进行检查？剔除之外的数据，用剩下的数据估计μ和σ（精确到0.01）．

附：若随机变量Z服从正态分布N(μ,σ2)，则P(μ–3σ<Z<μ+3σ)=0.997?4，0.997?416≈0.959?2，．

20.（12分）

已知椭圆C：x?/a?+y?/b?=1（a>b>0），四点P1（1,1），P2（0,1），P3（–1，√3/2），P4（1，√3/2）中恰有三点在椭圆C上.

（1）求C的方程；

（2）设直线l不经过P2点且与C相交于A，B两点.若直线P2A与直线P2B的斜率的和为–1，证明：l过定点.

21.（12分）

已知函数=ae?^x+（a﹣2）e^x﹣x.

（1）?讨论的单调性；

（2）?若有两个零点，求a的取值范围.

（二）选考题：共10分。

请考生在第22、23题中任选一题作答，如果多做，则按所做的第一题计分。

22．[选修4-4，坐标系与参数方程]（10分）

在直角坐标系xOy中，曲线C的参数方程为（θ为参数），直线l的参数方程为.

（1）若a=-1，求C与l的交点坐标；

（2）若C上的点到l的距离的最大值为，求a.

23.[选修4—5：不等式选讲]（10分）

已知函数f（x）=–x?+ax+4，g(x)=│x+1│+│x–1│.

（1）当a=1时，求不等式f（x）≥g（x）的解集；

（2）若不等式f（x）≥g（x）的解集包含[–1，1]，求a的取值范围.