湖南省六校联盟2017-2018学年高三上学期12月联考英语试题 Word版含答案
湖南省三湘名校教育联盟2018届高三第三次联考英语试题Word版含解析
湖南省三湘名校教育联盟2018届高三第三次联考英语试题Word版含解析湖南省三湘名校教育联盟2018届高三第三次联考英语试题第一部分听力(版权:百强校英语解析团队专供)(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。
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 plan to do in the holiday?A. Stay at home.B. Have a picnic.C. Goswimming.2. Where does the conversation probably take place?A. In a restaurant.B. In a gym.C. In astore.3. When is the woman’s birthday?A. Next Monday.B. Next Tuesday.C. NextSunday.4. Who has difficulty in learning English?A. Lempel.B. Linda.C. Jockey.5. What are the speakers doing now?A. Waiting for someone at the station.B. Booking tickets for their trip.C. Talking about their plan.第二节(版权:百强校英语解析团队专供)(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。
2017-2018高三十校联考12月带答案详解
2017学年第一学期高三十校联合调研II. Grammar and VocabularySection A （20%）Directions: After reading the passage below, fill in the blanks to make the passages coherent and grammatically correct. For the blanks with a given word, fill in each blank with the proper form of the given word; for the other blanks, use one word that best fits each blank.How to Find Happiness without Buying itOur materialistic society has led us to believe that happiness cannot be obtained without having money.Rather than learning to be satisfied with what we have, we ___21___ (teach)to want more. We learn from advertising, and from the media, __22____ we need to buy trinkets and toys in order to make ourselves happy, or __23___ (fulfill) emotional needs, and that the purchases they are trying to talk us into will provide us with the psychological comfort we are looking for.Unfortunately, as a society we have bought into these ___24___ (misguide)messages and have come to believe that ___25__ (spend) money on certain items will bring us fame, fortune, happiness, beauty, or popularity. As a result, we trade hours of our lives working, sacrificing time that __26___ have been spent with our families, ___27__ the pursuit of the almighty dollar.Actually, there are a number of ways to enjoy life without the need for a great deal of money. For example, Think about __28__ you would spend your time, and what you would do for enjoyment. Change your focus from material possessions to ___29__ that bring you enjoyment, such as spending quality time with your family and friends.Certainly, it is important to work and earn enough to provide for our basic needs and the needs of our families, but it is important to recognize when the desire for personal possessions becomes overly consuming, __30___ otherwise will upset a balance between a satisfying work life and a rich home life. The best way to achieve such a balance is to ensure the drive for material possessions does not become all consuming.Section BDirections: Complete the following passage by using the words in the box. Each word can only be used once. NoteA pen has always been a(n) (31) ________tool when it comes to taking exams. However, in this digital age, this traditional tool may become a thing of the past.Cambridge University in Britain is considering ending 800 years of written exams and allowing students to use laptops(手提电脑) or iPads to take exams instead.The move comes after Cambridge teachers complained that students’ handwriting is becoming too hard to recognize. The (32)______ in being able to write neatly could largely be down to the (33)______ on laptops in lectures and elsewhere.“There has definitely been a (34)______ trend. It is difficult for both the students and the examiners as it is harder and harder to read these scripts,” Sarah Pearsall, a senior lecturer at the university, told The Telegraph.As a result, more and more students with poor handwriting are being (35)______ to return to university duringthe summer holidays to read their answers aloud to university administrators.However, some (36)______ the move, fearing the handwritten word would become a lost art. Tracey Trussell, a handwriting expert at the British Institute of Graphologists, (37)______ Cambridge to “make sure that students continue to write by hand, particularly in lectures”. She told The Telegraph that writing by hand could help students improve their memory and understand lessons better.Meanwhile, there are also concerns that primary and secondary schools could follow Cambridge’s examples.In fact, a similar plan was carried out for some first- and second-year students at Edinburgh University in the UK in 2011, reported The Scotsman. Senior officials at the university believed it was (38)______ to expect students to use pens and paper during exams when most of their coursework was done using computers.The move also echoes the opinions of Harvard professor Eric Mazur, known as the father of the “flipped classroom (翻转课堂)”. He believed that the rise of the (39)______ to mobile internet means that we live in an age in which we don’t need to memorize anything. Students should be tested on their creative and (40)______ skills, rather than the ability to remember information, he said during the Times Higher Education World Academic Summit in September.III. Grammar and VocabularySection ADirections: For each blank in the following passage there are four words or phrases marked A, B, C and D. Fill in each blank with the work or phrase that best fits the context.It's no secret that as a population, Americans have been getting heavier, but researchers now say that our weight problem may be worse than we thought.In a study published in the journal PLOS One, lead author Dr. Eric Braverman says that our current measure of obesity (肥胖症) -- body mass index, or BMI -- significantly (41) ______ the number of people, especially women, who are obese.Braverman and his co-author, Dr. Nirav Shah, studied 1,400 men and women, comparing their BMI measurement to their percentage of body fat, as measured by a dual-energy X-ray absorptiometry (DEXA) scan. While BMI is a simple ratio of a person’s height and weight, the DEXA scan-- which is normally used to measure body density (密度) -- can (42) ______ between bone, fat and muscle mass.Based on BMI, about one-third of Americans are considered obese, but when other methods of measuring obesity are used, that number may be (43) ______ to 60% according to Braverman.Physicians have complained for years that BMI is a(n) (44) ______ measure of healthy weight. Extremely muscular people, (45) ______ , may weigh “too much” for their height, since dense muscle mass weighs more than fat, thus qualifying as obese even if their bodies contain very little fat. Yet it’s not extra weight itself, but excess fat that (46) ______ health problems.“People aren’t being diagnosed as obese, so they’re not being told about their risk of disease or being given (47) _____ on how to improve their health,” Braverman said. Data show that people who (48) ______ to put on pounds are more likely to continue getting heavier, increasing their risk for a number of diseases.So why is BMI still being used, if it’s not (49) ______ For now, it’s the best and easiest way for physicians to measure a person’s healthy weight while taking into account his or her general body (50) ______. DEXA scans are far too expensive to be used as a (51) ______ measure during doctor’s visits. BMI isn’t perfect, but many experts say it’s the best they have.Still, as results like Braverman’s continue to (52) ______, it may be time to consider other ways of tracking weight, and (53) ______, body fat. “It’s important to point out the (54) ______ of the BMI,” Dr.Richard Bergman, director of Cedars Sinai’s Obesity and Diabetes Research Institute in Los Angeles said. “It’s a poor measure of (55) ______, and we do need better measures.”41、A. predicts B. underestimates C. increases D. reduces42、A. compare B. recognize C. identify D. distinguish43、A. closer B. related C. devoted D. key44、A. important B. imperfect C. incredible D. uncertain45、A. for example B. in contrast C. in addition D. without doubt46、A. arises from B. owes to C. leads to D. goes through47、A. views B. orders C. instruction D. focus48、A. decide B. start C. hope D. fear49、A. right B. recognizable C. popular D. precise50、A. structure B. well-being C. function D. weight51、A. special B. routine C. scientific D. decisive52、A. fill in B. run out C. go down D. build up53、A. in particular B. on occasion C. after all D. in all54、A. mistakes B. failure C. inferiority D. weakness55、A. health B. body C. fatness D. diseasesSection B(22分)Directions: Read the following three passage. E ach passage is followed by several questions or unfinished statements. For each of them are four choices marked A, B,C and D. Choose the one that fits best according to the information given in the passage you have read.(A)While a female politician or first lady can use her clothing to create a favorable public image, male politicians don’t have as many fashion choices to play with. But Canadian Prime Minister Justin Trudeau seems to have discovered a goldmine – his socks.He’s been seen wearing “statement socks” at many public events. For example, during a NATO(北大西洋公约组织) meeting in Brussels in May, Trudeau wore one blue sock and one pink, both with the NATO symbol printed on them. And in June, he wore a pair of socks with the pattern of maple leaves – a national symbol of Canada – when he appeared on a TV show.The New York Times’ editor Vanessa Friedman praised Trudeau’s play on his socks as “clever”.“Socks are subtle(微妙的) enough not to be distracting, but visible enough that you can’t miss the point,” she wrote. “Rarely have a man’s ankles said so much.”But not all the playful socks that Trudeau wears send some kind of political message – some of them are just for fun.One example is a pair he wore during a meeting with Enda Kenny, then the prime minister of Ireland, in Montreal on May 4. During their meeting, Trudeau wore Star Wars socks – simply because that day happened to be International Star Wars Day. If this pair of socks sent out any message, according to Vogue magazine reporter Emily Farra, that message was “just that he has a quirky side and loves George Lucas films,” she wrote.However, some say that 45-year-old Trudeau’s unusual sock choices show a childish side of the prime minister that proves he isn’t mature enough to be the leader of a country.But Friedman doesn’t see it that way. “The socks have been a source of pride and applause on an international scale – a symbol both of Mr Trudeau’s ability to embrace multiculturalism and of his position as a next-generation leader not bound by old traditions,” she wrote. “They have opened up possibilities for the future.”56. Trudeau wore a pair of socks with the pattern of maple leaves to _______.A. distract audience’s attention from the TV showsB. send a message that he is proud of his countryC. narrow the gap between politician and civiliansD. claim that he is the new-generation leader of the country57. The underlined word “quirky” is closest in meaning to _______.A. abnormalB. seriousC. enthusiasticD. odd58. According to Friedman, Justin Trudeau _______.A. has a promising future but still an inexperienced politicianB. used a clever way to explore and finally discovered a goldmineC. is open-minded and is ready to accept different culturesD. is a leader who has abandoned old traditions to build up his future59. The article is mainly about _______.A. the strange hobby of a young politicianB. a young leader’s clever choice of socksC. how male politicians maintain public imageD. the gender difference in modern politicians(B)●CAFE DISPLAY●OUR JOURNEYS●12 April-29 May 2008Young people explore how they have adapted to life in Oxford.“When I first came here,” says one young African woman, “I just wanted to cry all the time. And now I have learned to laugh again.” Working with photographer Rory Carnegie and writer Nikki van der Gaag, young men and women explore their journey from the time they first arrived in a strange place to where they find themselves today. Organized by The Sunday Times Oxford Literary Festival (10－17 April 2008). Supported by the Maggie Black Trust and Oxford City Council.● ACTIVlTlES FOR CHlLDREN AND FAMILIES● MODERN ART TROLLEY FREEArt activities for children every weekend during the exhibition in the Entrance Space from 2 p. m. to 4 p. m. Just drop in. Children must be led by an adult.● WORKSHOP FOR 8 TO 12 YEAR OLDSThursday 7 April, 10：30 a. m. to 1：30 p. m.Looking at themes from the exhibition and exploring pictures based ideas through group discussion and using digital cameras. Led by Judie Waldmann.● BOOK LAUNCH FREEThe Drawing Book by Sarah Simblet is a practical approach to drawing the world around you. Sarah Simblet, who teaches at the Ruskin School of Drawing and Fine Art, University of Oxford, will be present to give a short talk about the development of her book. Special price of￡18 on copies purchased in the evening.Booking recommended on 01865 813802● TEACHERS’ EVENING FREEThursday 21 April, 5 p.m. to 7：30 p. m.Lecture by Susan Bright, independent writer and lecturer, at 5：30 p. m. followed by an opportunity to view the exhibition. FREE Education Notes will be provided for teachers attending the evening.● WORKSHOP FOR PRIMARY TEACHERSSaturday 7 May, 10：30 a. m. to 1：30 p. m.Workshop for primary teachers who would like to develop their practical art skill as well as gain an understanding of modern art practice. Led by Judie Waldmann, artist and former primary school teacher.● TALKS AND WORKSHOPS FOR SCHOOL GROUPSExhibition talks and artist-led workshops to create work in response to the exhibition are available for pre-booked school groups. Suitable for primary and secondary schools, to check availability and discuss details call Sarah Mossop on 1865 813816.60. If you are a teacher and interested in art, you probably would like to go to ________.A. TEACHERS’ EVENINGB. MODERN ART TROLLEYC. WORKSHOP FOR PRIMARY TEACHERSD. TALKS AND WORKSHOPS FOR SCHOOL GROUPS61. What can we learn from the passageA. Susan Bright will give a short talk at the launch of the Drawing Book.B. Rory Carnegie and Nikki will teach young people how to take photos.C. The workshop led by Judie is intended for the secondary school students.D. The children who go to the Modern Art Trolley must be led by an adult.62. Which of the following would be the best title of the textA. Free journeysB. Spring eventsC. Weekend ActivitiesD. Activities for teachers(C)Researchers in the field of psychology have found that one of the best ways to make an important decision, such as choosing a university to attend or a business to invest in, involves the utilization of a decision worksheet. Psychologists who study optimization compare actual decisions made by people to theoretical ideal decisions to see how similar they are. Supporters of the worksheet procedure believe that it will yield optimal, that is, the best decisions. Although there are several variations on the exact format that worksheet can take, they are all similar in their essential aspects. Worksheets require defining the problem in a clear and concise way and then listing all possible solutions to the problem. Next, the relevant considerations that will be affected by each decision are listed, and the relative importance of each consideration or consequence is determined. Each consideration is assigned a numerical value to reflect its relative importance. A decision is mathematically calculated by adding these values together. The alternative with the highest number of points emerges as the best decision.Since most important problems are multifaceted(多层面的), there are several alternatives to choose from, each with unique advantages and disadvantages. One of the benefits of a pencil and paper decision-making procedure is that it permits people to deal with more variables than their minds can generally comprehend and remember. On the average, people can keep about seven ideas in their minds at once. A worksheet can be especially useful when the decision involves a large number of variables with complex relationships. A realistic example for many college students is the question “What will I do after graduation ” A graduate might seek a position that offers specialized training, pursue an advanced degree, or travel abroad for a year.A decision-making worksheet begins with a brief statement of the problem that will also help to narrow it. It is important to be clear about the distinction between long-range and immediate goals because long-range goals often involve a different decision than short-range ones. Focusing on long range goals, a graduating student might revise the question above to “What will I do after graduation that will lead to a successful career?”63. Of the following steps, which occurs before the others in making a decision worksheetA. Listing the consequences of each solution.B. Calculating a numerical summary of each solution.C. Deciding which consequences are most important.D. Writing down all possible solutions.64. According to decision-worksheet theory, an optional decision is defined as one that _______.A. has the fewest variables to considerB. uses the most decision worksheetsC. has the most points assigned to itD. is agreed to by the greatest number of people65. The author states that “On the average, people can keep about seven ideas in their minds at once” to explain that ________.A. most decisions involve seven stepsB. human mental capacity has limitationsC. some people have difficulty making minor as well as major decisionsD. people can learn to keep more than seven ideas in their minds with practice66. What does the passage mainly discussA. A tool to assist in making complex decisions.B. A comparison of actual decisions and ideal decisions.C. Research on how people make decisions.D. Differences between long-range and short-range decision making.Section C (8%)Directions: Complete the following passage by using the sentences given below. Each sentence can be used only once. Note that there are two sentences more than you need.Your clients and colleagues don’t have time to engage fully with every e-mail they get. Some of them receive hundreds of messages per day. That’s why they start with the ones they can deal with quickly. They may never get around to answering — or even reading — the rest.So how do you earn their attention? Try these tips:Stick to standard capitalization and punctuation. Conventions of good writing may seem like a waste of time for e-mail, especially when you’re tapping out messages on a handheld device. But it’s a matter of getting things right — the little things. Even if people in your group don’t capitalize or punctuate in their messages, stand out as someone who does. ______67_____ And their abbreviated style can be confusing. It takes less time to write a clear message the first time around than it does to follow up to explain what you meant to say.Be brief — but not too brief. _____68____ The more they have to scroll or swipe, the less receptive they’ll be to your message. They’ll probably just skim it and miss important details — or skip it altogether. So rarely compose more than a single screen of reading. Focus your content, and tighten your language. But as you’re trimming the fat from your message, keep the meat intact. When giving a project update, for example, supply enough background information to orient your readers. Consider your message from their perspective. They aren’t as immersed in your project as you are, and they probably have many other things going on. So remind them where things stood when you last sent an update, and describe what’s happened since then.____69____ Before hitting “Send,” check your subject line. If it’s generic or blank, your message will get lost in your recipient’s overstuffed inbox. Are you asking someone to take action? Highlight that in the subject line.Make your request easy to find — and fulfill.Copy people judiciously. Include only those who will immediately grasp why they’re on the thread; don’t automatically click on “Reply All.” Your correspondent may have been over inclusive with the “Copy” list, and if you repeat that mistake, you’ll continue to annoy the recipients who shouldn’t be there. ____70____Summary Writing（共10分）Directions: Read the following passage. Summarize the main idea and the main point(s) of the passage in no more than 60 words. Use your own words as far as possible.Tired of all the pushing in supermarkets? Fed up with waiting in endless lines to pay for what you have bought? Angry at wasting time in traffic jams only to find no parking spaces when you eventually arrive at the store? If this is you, then online shopping is the answer to your dreams of trouble-free shopping. Or is it?Online shopping brings its own challenges. Here are a few things to bear in mind when browsing various websites. The claim made by online sites is that shopping online is a safe and secure way to make purchases. The evidence challenges this. In any case, you only have to be the victim of fraud (欺诈) once to experience all the problems that come with this form of stealing. Use only sites that have a trusted history and an excellent reputation.Another problem is that the appearance of items in reality is often quite different from what you see on your computer screen. This might not be a problem if you are buying washing up powder but could be a major disappointment when that beautiful blue dress you ordered turns up in green. Also, product descriptions are sometimes simply untrue! Perhaps the wisest plan is to purchase items whose design and color are not essential to customer satisfaction.Some even argue that online shopping indirectly contributes to global warming. Yes, your car can stay parked but how are online goods delivered? Often by some large van pouring out carbon monoxide(一氧化碳) and adding to our already desperate traffic problems. You are also by now becoming increasingly irritated by the fact that the delivery is late!第II卷（共40分）V. Translation(3+3+4+5=15分)Directions: Translate the following sentences into English, using the words given in the brackets.1.人们的共同之处越多，相处得就越好。
湖南省2017-2018学年高三六校联考理数试题 Word版含解析
2017-2018学年一、选择题（本大题共12个小题，每小题5分，共60分.在每小题给出的四个选项中，只有一项是符合题目要求的.）1.已知集合{}{2|650,|,A x x x B x y A B =-+≤=== （ ）A ．[)1,+∞B ．[]1,3C ．(]3,5D ．[]3,5 【答案】D考点：集合的交集运算．2.“若,x y 都是偶数，则x y +也是偶数”的逆否是（ ） A ．若x y +不是偶数，则x 与y 都不是偶数 B ．若x y +是偶数，则x 与y 不都是偶数 C ．若x y +是偶数，则x 与y 都不是偶数 D ．若x y +不是偶数，则x 与y 不都是偶数 【答案】D 【解析】试题分析：依据逆否的概念把原中的条件和结论同时“换位”且“换否”，注意“都是”的否定为“不都是”，所以原的逆否应为“若x y +不是偶数，则x 与y 不都是偶数”，故选D. 考点：四种的概念.3.若执行右边的程序框图，输出S 的值为6，则判断框中应填入的条件是（ ）A ．32?k <B ．65?k <C ．64?k <D ．31?k < 【答案】C考点：程序框图中的循环结构. 4.下列函数中在3(,)44ππ上为减函数的是（ ） A ．22cos 1y x =- B ．tan y x =- C ．cos(2)2y x π=-D ．sin 2cos 2y x x =+【答案】C 【解析】试题分析：A ．22cos 1cos2y x x =-=，当3x (,)44ππ∈时，32x ,22ππ⎛⎫∈ ⎪⎝⎭，函数不单调；B ．tan y x =-在3(,)44ππ上不连续，也不符合题意；C ．cos(2)sin 2x 2y x π=-=，当3x (,)44ππ∈时，32x ,22ππ⎛⎫∈ ⎪⎝⎭，函数单调递减，符合题意；D ．sin 2cos 224y x x x π⎛⎫=+=+ ⎪⎝⎭，当3x (,)44ππ∈时，372x ,444πππ⎛⎫+∈ ⎪⎝⎭，函数不单调，也不符合题意，故选C. 考点：三角函数的单调性.5.采用系统抽样方法从960人中抽取32人做问卷调查，为此将他们随机编号为1，2，…，960，分组后在第一组采用简单随机抽样的方法抽到的号码为9．抽到的32人中，编号落入区间[]1,450的人做问卷A ，编号落入区间[]451,750的人做问卷B ，其余的人做问卷C ，则抽到的人中，做问卷B 的人数为（ ） A ．15 B ．7 C ．9 D ．10 【答案】D考点：随机抽样中的系统抽样法.6.已知某几何体的三视图如图所示，则该几何体的体积为（ ）A ．3πB ．103πC ．6πD ．83π【答案】A 【解析】试题分析：由三视图可知该几何体为底面半径为1高为6的圆柱按图中的截面截去一半剩下的部分，如图所示，所以几何体的体积21163,2V ππ=⨯⨯=故选A.考点：几何体的三视图与体积.7.若231(2)(1)x x x++-的展开式中的常数项为a ，则20(31)ax dx -⎰的值为（ ）A ．6B ．20C ．8D ．24 【答案】A考点：二项式定理及微积分基本定理的应用.8.若函数2x y =图象上存在点(,)x y 满足约束条件302302x y x y x m +-≤⎧⎪--≤⎨⎪≥⎩，则实数m 的最大值为（ ） A ．1 B ．32 C ．2 D ．12【答案】D 【解析】试题分析：作出不等式组表示的平面区域，如图所示，要使函数2xy =图象上存在点(,)x y 满足约束条件，即2xy =图象上存在点(,)x y 在阴影区域内，则必有12m ≤，即实数m 的最大值为12，故选D.考点：简单的线性规划.9.已知数列{}n a 的通项公式5n a n =-，其前n 项和为n S ，将数列{}n a 的前4项抽去其中一项后，剩下三项按原来顺序恰为等比数列{}n b 的前3项，记{}n b 的前n 项和为n T ，若存在*m N ∈，使对任意*n N ∈，总有n n S T λ<+恒成立，则实数λ的取值范围是（ ）A ．2λ≥B ．3λ>C ．3λ≥D ．2λ> 【答案】D考点：等差、等比数列的前n 项和公式及数列的函数特性.10.已知两个不相等的非零向量,a b ，两组向量12345,,,,x x x x x 和12345,,,,y y y y y 均由2个a 和3个b 排成一列而成．记1122334455min ,S x y x y x y x y x y S =++++ 表示S 所有可能取值中的最小值，则下列正确的是（ ）A ．22min 22S a a b b =++ B ．22min 23S a b =+C ．若a b ⊥，则min S 与a 无关D ．S 有5个不同的值 【答案】C 【解析】试题分析：S 可能的取值有3种情况：2222222212,S a a b b b S a a b a b b b =++++=++++ ，23S a b a b a b a b b =++++ ．2213232()0,()0S S a b S S a b -=->-=->，所以321S S S <<，若2min 4S b a b =+ ，若a b ⊥，则min S 与a 无关，故选C ．考点：共线向量定理及平面向量数量积的应用.【方法点晴】本题以的形式考查平面向量的数量积及共线向量定理的应用，考查学生推理、运算和分析问题的能力，属于中档题.虽然形式上本题条件复杂给考生一种威慑感，但仔细分析实际上就是考查了平面向量的数量积运算，解答本题的关键是先求出S 的三种结果，通过作差比较123,,S S S 的大小关系，问题就迎刃而解了.11.设a b c x y ===+，若对任意的正实数,x y ，都存在以,,a b c 为三边长的三角形，则实数p 的取值范围是（ ） A ．(1,3) B ．(]1,2 C ．17(,)22D ．以上均不正确 【答案】A考点：基本不等式的应用.【方法点晴】本题结合三角形的基本性质考查了基本不等式的应用，属于中档题.解答本题应先根据基本不等式求得c a c a ≥≥>，再三角形的性质任意两边之和大于第三边，任意两边之差小于第三边得到c a b a c -<<+即得p 的不等式组，再利用基本不等式结合函数的单调性求出p 的取值范围.12.已知,A B 分别为椭圆2222:1(0)x y C a b a b+=>>的左、右顶点，不同两点,P Q 在椭圆C上，且关于x 轴对称，设直线,AP BQ 的斜率分别为,m n ，则当21ln ln 2b a m n a b mn++++取最小值时，椭圆C 的离心率为（ ）A ．3 B ．3 C ．12 D ．2【答案】D 【解析】考点：椭圆的标准方程、几何性质及基本不等式.【方法点晴】本题主要考查了椭圆的标准方程和几何性质，着重考查了基本不等式和考生分析问题及利用函数思想解决问题的能力，属于难题.解答本题的入手点是消元法，根据椭圆方程把mn 转化为22b a，然后通过换元来构造函数，考查了考生应用函数的意识和能力，把问题转化为求函数在给定区间上的最值点问题，最后再根据椭圆中基本量,,a b c 求得离心率的值.第Ⅱ卷（非选择题共90分）二、填空题（本大题共4小题，每题5分，满分20分．）13.已知复数21iz i=-，则z =________．【解析】试题分析：()()()()21211111i i i z i i i i i i +===+=-+--+，所以z = 考点：复数模的概念与复数的运算.14.在ABC ∆中，2,BC AC ABC ==∆的面积为4，则AB 的长为_________．【答案】4或【解析】试题分析：1242ABC S C ∆=⨯⨯=，得sin C =，∴cos 5C =±．∴AB =4AB =或考点：利用余弦定理解三角形.15.已知圆2224250x y x y a +-++-=与圆222(210)2210160x y b x by b b +---+-+=相交于1122(,),(,)A x y B x y 两点，且满足22221122x y x y +=+，则b =________． 【答案】53考点：圆与圆的位置关系.【方法点晴】本题形式上考查了圆圆的位置关系，但本质上还要转化为直线与圆的位置关系问题，考查考生利用所学知识分析问题、解决问题的能力，属于中档题.本题解答的要点有二，一是通过两圆为方程得到它们公共弦所在直线的方程，把问题转化为直线与圆的位置关系；二是对条件“22221122x y x y +=+”的理解和应用，考查考生数形结合的意识，实质上表达了,A B 两点到原点的距离相等，这样通过圆的性质来解答，问题就变得容易了. 16.给出下列：（1）设()f x 与()g x 是定义在R 上的两个函数，若1212()()()()f x f x g x g x +≥+恒成立，且()f x 为奇函数，则()g x 也是奇函数；（2）若12,x x R ∀∈，都有1212()()()()f x f x g x g x ->-成立，且函数()f x 在R 上递增，则()()f x g x + 在R 上也递增；（3）已知0,1a a >≠，函数,1(),1x a x f x a x x ⎧≤=⎨->⎩，若函数()f x 在[]0,2上的最大值比最小值多52，则实 数a 的取值集合为12⎧⎫⎨⎬⎩⎭；（4）存在不同的实数k ，使得关于x 的方程222(1)10x x k ---+=的根的个数为2个、4个、5个、8 个．则所有正确的序号为________． 【答案】（1）（2）（3）考点：函数的单调性、奇偶性及函数的零点等知识的综合应用.【方法点晴】本题以多选题的形式考查了考生对函数单调性、奇偶性、分段函数及函数与方程等知识及分类讨论和数形结合及化归的能力，属于难题.要准确解答多选题，需要考生对每个都要作出准确判断才能得分.解答的（1）、（2）的关键是构造法，根据题目条件构造函数奇偶性和单调性定义的形式来判断；（3）考查了分段函数的单调性和分类讨论，避免思维定势；（4）需要通过数形结合来解答.三、解答题（本大题共6小题，共70分.解答应写出文字说明、证明过程或演算步骤.） 17.（本小题满分12分）已知数列{}n a 的前n 项和为n S ，常数0λ>，且11n n a a S S λ=+对一切正整数n 都成立． （1）求数列{}n a 的通项公式；（2）设10,100a λ>=，当n 为何值时，数列1lgn a ⎧⎫⎨⎬⎩⎭的前n 项和最大？ 【答案】(1) 若10a =，则0n a =，若10a ≠，则2nn a λ=；(2) 数列1lg n a ⎧⎫⎨⎬⎩⎭的前6项的和最大. 【解析】试题分析：（1）根据11n n a a S S λ=+，当1n =时，求出1a ，当2n ≥时，写出11,n n a s --的表达式，两式相减消去1,n n S S -得到数列{}n a 的递推式，根据等比数列通项公式求解，注意讨论1a 是否等于0；（2）根据（1）的结论设1lgn nb a =，整理得2lg2nb n =-，判断出{}n b 的单调性和各项的符号，即可求得最大值.考点：数列的递推公式和等差数列通项公式和前n 项和的最值问题. 18.（本小题满分12分）如图，在多面体ABCDE 中，DB ⊥平面ABC ，//AE DB ，且ABC ∆为等边三角形，1,2AE BD ==，CD 与平面ABCDE （1）若F 是线段CD 的中点，证明：EF ⊥平面DBC ；（2）求二面角D EC B --的平面角的余弦值．【答案】(1)证明见解析；(2)4（2）解：取AB 的中点O ，连结,OC OD ，则OC ⊥平面ABD ，CDO ∠即是CD 与平面ABDE所成角，4OC CD =，设AB x =4x=2AB =，取DE 的中点为G ，以O 为原点，OC 为x 轴，OB 为y 轴，OG 为z 轴，建立如图空间直角坐标系，则考点：空间中的垂直关系及空间向量在求解二面角中的应用.19.（本小题满分12分）某学校有120名教师，且年龄都在20岁到60岁之间，各年龄段人数按[)[)[)[)、、、20,3030,4040,5050,60、两项培训，培训结束分组，其频率分布直方图如图所示，学校要求每名教师都要参加A B后进行结业考试．已知各年龄段两项培训结业考试成绩优秀的人数如下表示，假设两项培训是相互独立的，结业考试成绩也互不影响．（1）若用分层抽样法从全校教师中抽取一个容量为40的样本，求从年龄段[)20,30抽取的人数；（2）求全校教师的平均年龄；（3）随机从年龄段[)20,30和[)30,40内各抽取1人，设这两人中A B 、两项培训结业考试成绩都优秀的人数为X ，求X 的概率分布和数学期望．【答案】（1）14；（2）35；（3）概率分布见解析，数学期望是267392.由题设知X的可能取值为0，1，2．∴15385153153177 (0)(1)(1),(1)(1)(1)498196498498392 P X P X==--===⨯-+-⨯=，15345(2)498392P X==⨯=，．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．10分∴X的概率分布为X的数字期望为8517745267012196392392392EX =⨯+⨯+⨯=．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．12分考点：用样本的数字特征估计总体及离散型随机变量的分布列和数学期望. 20.（本小题满分12分）已知抛物线方程为22(0)x py p =>，其焦点为F ，点O 为坐标原点，过焦点F 作斜率为(0)k k ≠的直线与抛物线交于,A B 两点，过,A B 两点分别作抛物线的两条切线，设两条切线交于点M ．（1）求OA OB；（2）设直线MF 与抛物线交于,C D 两点，且四边形ACBD 的面积为2323p ，求直线AB 的斜率k ．【答案】（1）234p -；（2）k =3k =±.根据1()(0)f x x x x =+>的图象和性质得，23k =或213k =，即k =3k =±．．．．12分考点：直线与抛物线位置关系的应用.【方法点睛】本题主要考查了直线与抛物线位置关系问题，考查学生的运算能力及综合运用所学知识分析问题、解决问题的能力，属于难题.本题第一问思维简单，主要考查了考生运用方程思想和韦达定理解决问题的能力，第二问的技巧在于利用导数的几何意义求得切线AM 斜率和方程，代换得到BM 的方程，从而求得点M 坐标，发现直线MF 与AB 相互垂直对于最后表示出四边形的面积十分关键，根据弦长公式求出AB 的长，代换得到CD 的出，最后通过四边形ACBD 的面积得到斜率k 的方程，这一过程考查了考生的逻辑推理能力和运算能力.21.（本小题满分12分）已知函数()(ln 2)x f x e x k -=-（k 为常数， 2.71828e = 是自然对数的底数），曲线()y f x =在点(1,(1))f 处的切线与y 轴垂直．（1）求()f x 的单调区间； （2）设1(ln 1)()xx x g x e-+=，对任意0x >，证明：2(1)()x x x g x e e -+<+． 【答案】（1）()f x 的单调递增区间是(0,1)，单调递减区间是(1,)+∞；（2）证明见解析.设1()ln 1k x x x =--，则211()0k x x x'=--<，在(0,)+∞上恒成立，即()k x 在(0,)+∞上是减函数， 由(1)0k =知，当01x <<时()0k x >，从而()0f x '>，当1x >时()0k x <，从而()0f x '<．综上可知，()f x 的单调递增区间是(0,1)，单调递减区间是(1,)+∞．．．．．．．．．．．．．．．．．．．．．．．．5分考点：导数的几何意义、利用导数研究函数在给定区间上的最值及不等式的证明.【方法点睛】本题主要考查了导数的几何意义及利用导数研究函数的单调性和通过求给定区间上的最值来证明不等式，考查考生讨论和转化的数学思想，属于难题.本题解答的难点是第二问转化的过程，在第一问解答的基础上，利用不等式的性质把要证明的不等式转化为证明两个不等式，分别构造函数，再利用导数研究其单调性求得其最值，考查了考生应用所学函数、导数、不等式知识解决问题的能力.请考生在第22、23、24三题中任选一题作答，如果多做，则按所做的第一题记分.解答时请写清题号.22.（本小题满分10分）如图，AB 是O 的直径，弦BD CA 、的延长线相交于点E ，EF 垂直于BA 的延长线于点F ．（1）求证：DEA DFA ∠=∠；（2）若030EBA ∠=，2EF EA AC ==，求AF 的长．【答案】（1）证明见解析；（2）1.考点：平面几何中四点共圆及三角形相似证明和应用.23.（本小题满分10分）已知曲线C 的极坐标方程是2cos ρθ=，以极点为平面直角坐标系的原点，极轴为x 轴的正半轴，建立平面直角坐标系，直线l的参数方程是12x m y t ⎧=+⎪⎪⎨⎪=⎪⎩（t 为参数）．（1）求曲线C 的直角坐标方程和直线l 的普通方程；（2）设点(,0)P m ，若直线l 与曲线C 交于,A B 两点，且1PA PB = ，求实数m 的值．【答案】（1）222x y x +=，x m =+；（2）1m =±1m =.（2）把212x m y t ⎧=+⎪⎪⎨⎪=⎪⎩（t 为参数）代入方程：222x y x +=化为：2220t t m m ++-=，由0∆>，解得 13m -<<，∴2122t t m m =-． ∵121PA PB t t == ，∴221mm -=±， 解得1m =或1m =．又满足0∆>．∴实数1m =±或1m =．．．．．．．．．．．．．．．．．．．．10分考点：圆的极坐标方程及直线参数方程的意义.24. （本小题满分10分）函数()f x =．（1）求函数()f x 的定义域A ；（2）设{}|12B x x =-<<，当实数()R a b B C A ∈ 、时，证明：124a b ab +<+． 【答案】（1）{}|41A x x x =≤-≥或；（2）证明见解析.考点：绝对值不等式的解法及不等式的证明.。
湖南省三湘名校教育联盟2017届高三第三次大联考英语试题_word版有答案AwwwwK
第Ⅰ卷（选择题共100分）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 do this evening?A.To go to the concert.B.To meet Jack.C.To write his essay.2.Why will the man get home late?A.Because he will meet his friend.B.Because he has just taken a new project.C.Because there is a traffic jam.3.What is the boy doing?A.He is having a class.B.He is doing his own homework.C.He is doing Jim's homework.4.Which line should the man take?A.Line 6.B.Line 16.C.Line 60.5.Where did the conversation take place?A.In the hospital.B.At the hairdresser's.C.At the butcher's.第二节（共15小题；每小题1.5分，满分22.5分）听下面5段对话或对白，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。
【高考模拟】湖南省六校联盟2017届高三上学期12月联考试题 数学(文) Word版含答案
六校联盟高三年级联考试卷文科数学试题时量：120分钟 分值：150分命题人：周流金（醴陵一中）张先祥（浏阳一中）彭小飞（株洲二中）第Ⅰ卷(选择题，共60分)一、选择题：本大题共12个小题，每小题5分，共60分.在每小题给出的四个选项中，只有一项是符合题目要求的.1．已知复数Z 满足1Z i i ⋅=+，则Z 的共轭复数Z 的虚部是 （ ） A ．1 B ．i - C ． i D ．1-2．已知集合{}lg(1)A x y x ==-，{}220B x x x =-<，则A B = ( )A ．{}1x x > B. {}0x x > C. {}02x x << D. {}12x x <<3．已知向量()()1,2,,2a b x ==-，若a b + 与a b - 平行，则实数x 的值是（ ）A ．4B ．1C ．1-D ．4-4．设,a b R ∈，则“20aa b<-”是“a b <”的（ ）A ．充分而不必要条件B ．必要而不充分条件C ．充要条件D ．既不充分也不必要条件 5．函数()1x f x xe x =--的零点的个数为（ ）A ．0 B. 1 C ． 2 D ． 36．已知等比数列{}n a 为递增数列．若a 1>0，且2(a n ＋a n ＋2) ＝5a n ＋1，则数列{}n a 的公比q ＝（ ）A ．2或12 B. 2 C ．12D ．-27．若,2παπ⎛⎫∈⎪⎝⎭,则3cos 2sin 4παα⎛⎫=+ ⎪⎝⎭,则sin 2α的值为（ ） A ．118 B ．118- C ．1718 D ．1718-8．执行如右图所示的程序框图，则输出的结果为（ ） A ．1- B ．1 C ．2- D ．29．欧拉是科学史上一位多产的、杰出的数学家！ 他1707年出生在瑞士的巴塞尔城，渊博的知识，无穷无尽的创作精力和空前丰富的著作，都令人惊叹不已。
湖南省衡阳八中2017-2018学年高三上学期第三次月考试题 英语 Word版含答案
衡阳市八中2017-2018学年高三第三次月考英语试题请注意：时量120分钟满分150分本试卷分第Ⅰ卷（选择题）和第Ⅱ卷（非选择题）两部分。
第Ⅰ卷第一部分听力（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 woman do for work now?A. She cares for patients.B. She teaches at a college.C. she serves coffee.2．What are the speakers mainly talking about?A. Games.B. Streets.C. Movies.3．What is the man doing now?A. Playing a game.B. Watching something on TV.C. Getting ready to walk the dog4．What should the man do according to the woman?A. Repair his bike.B. Find the university.C. Buy a new bike.5. What does the woman suggest?A. Reading more at night.B. Reading on the train.C. Listening to the recording.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。
湖南省长沙市长郡中学2017-2018学年高三入学考试英语试题 Word版含答案
2017-2018学年本试卷分第I卷（选择题）和第II卷（非选择题）两部分。
时量120分钟。
满分150分。
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 buy for the woman?A. NotebooksB. PaperC. Pencils2. Where does the conversation take place?A. In a bookstoreB. In a libraryC. In the woman’s office3. Why will Mr. Rogers be out of the office next week?A. To take a holidayB. To attend a weddingC. To travel on business4. What does the man mean?A. The woman can’t leave earlyB. He’ll pick up the woman’s parentsC. Mr. Black won’t come at 4 o’clock5. What are the speakers talking about?A. A lift workerB. The man’s sisterC. A lift accident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。
【月考试卷】湖南省2017-2018学年高二12月联考英语试卷Word版含答案
【月考试卷】湖南省2017-2018学年高二12月联考英语试卷Word版含答案浏阳一中醴陵一中南方中学2017年下学期高二年级联考英语试题总分：150分时量：120分钟考试时间：2017年12月12日命题人：审题人：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 do first?A. Fix a bike.B. Have a Coke.C. Clean the windows.2. How is the woman learning Chinese?A. On the radio.B. On television.C. On the Internet.3. What has made the man so upset?A. The ugly walls.B. His kids.C. The business.4. When will the man leave for Tianjin?A. At 5:00.B. At 5:30.C. At 6:00.5. What are the speakers mainly talking about?A. A storm.B. A tree.C. A house.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，从每题所给的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。
请听第6段材料，回答第6至7题。
6. How many people did the woman travel with?A.Two.B. Three.C. Four.7. Where did the woman not go?A. China.B. Singapore.C. Malaysia.请听第7段材料，回答第8至9题。
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六校联盟2017-2018学年高三年级联考英语试题时量：120分钟分值：150分第I卷（选择题，共100分）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f共5小题；每小题1.5分，满分7.5分）听下面5段对话。
每段对话后面有一个小题，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 want to do?A. She wants to have lunch.B. She wants to buy a table.C.She wants to wait for someone.2. What is the time now by Shelly's watch?A. 2:55.B.3:00.C.3:05.3. What does the man really want to say?A. The lady shouldn't care too much about it.B. The kid has secretly had some of the candies.C. He gave the kid fewer candies on purpose.4. Where does the conversation most probably take place?A. In a lecture hall.B.On a train.C.In a cinema.5. Why does the man call Doctor Lee?A. He wants to see Doctor Lee about his illness.B. He wants to ask Doctor Lee to give a lecture.C. He wants to discuss something with Doctor Lee.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，各小题给出5秒钟的作答时间。
每段对话或独白读两遍。
请听第6段材料，回答第6，7题。
6. Where is the man going?A. The travel agency.B.The bank.C.The shop.7. How will the man go there?A. In his own car.B.In the woman's car.C.In a taxi.请听第7段材料，回答第8,9题。
8. What's the weather like outside?A. It's raining.B.It's sunny.C.It's cloudy.9. How does the woman feel now?A. Comfortable.B.Crazy.C.Frightened.请听第8段材料，回答第10至12题。
10. What's the relation between the speakers?A. Friends.B.Husband and wife.C.Boss and employee.11. Why does the woman look womed?A. She has been late for work recently.B. She is not getting on well with his boss.C. She has trouble taking her children to school.12. What might the woman think ofAlice's way to deal with her problem?A. Practical.B.Unbelievable.C.Doubtful.请听第9段材料，回答第13至16题。
13. How long will Anna still have to stay in London?A. At least 40 days.B.At least 30 days.C.At least 25 days.14. What does Anna do in the afternoon?A. Taking classes.B.Doing homework.C.Going sightseeing.15. Why does Anna want to improve English?A. To get a promotion soon.B. To communicate with her customers better.C. To make friends with British people.16. What do we know about Anna?A. She has never been to London before.B. She knew little English before coming to London.C. She practices English with her roommates.请听第10段材料，回答第17至20题。
17. What did the speaker do for his holiday last year?A. Went to the mountains.B.Went to the beach.C.Stayed at home.18. What does the speaker like about the seashore?A. Sunbathing at the seashore.B．Surfing on the sea.C. Taking a walk along the beach.19. How far is it to the seashore?A. 18 miles.B.80 miles.C.300 miles.20. Where did the speaker decide to go at last?A. To the beach.B.To the mountains.C.To the countryside.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）阅读下列短文，从每题所给的四个选项（A. B.C和D）中，选出最佳选项。
AChina Import and Export Fair, also known as the Canton Fair, is held in Guangzhou every spring and autumn. The Fair is a comprehensive one with the longest history, the highest level, the largest scale, the most complete exhibit variety, the broadest distribution of overseas buyers and the greatest business turnover in China.Canton Fair attracts more than 24 000 China s best foreign trade companies with good credibility and sound financial capabilities, and 500 0verseas companies to participate in the Fair.Canton Fair is a platform for Import and export mainly, with various and flexiblepatterns of trade. Besides traditional way of negotiating against samples, the Fair holds Canton Fair Online . Various types of business activities such as economic and technical cooperation and exchanges, goods inspection, insurance, transportation, advertising and consultation are also carried out in flexible ways. Business people from all over the worldare gathering in Guangzhou, exchanging business information and developing friendship. Events Schedule of the 115th Session of Canton FairTime: May lst, 14:00-16:00Place: No. 8 Meeting Room, B Floor, Area BEvent: Training Seminar of Overseas MarketingTheme: Market Segmentation and Channel BuildingDetails: Cloris, Project Facilitator, Trade for Sustainable Development of InternationalTrade Centre (ITC)Time: May 2nd, 14:00- 16:30Place: No. 8 Meeting Room, B Floor, Area BEvent: Fashion and Trend ForumTheme: The "must have" fashion trends for Meds and Womeds wear for Spring/Summer Details: Michael Leow, Sales and Market Director of Fashion Snoops (Asia Pacific)21. The Canton Fair is organized in Guangzhou _ .A. every two yearsB. every seasonC. once a yearD. twice a year22. If you want to visit the clothing show, you can be there _ .A. on May lst 14:00 - 18:00B. on May 2nd 14:00 - 16:30C. on May lst 8:00 - 16:30D. on May 2nd 10:00 - 16:0023. What is the main purpose of the text?A. To introduce the Canton Fair.B. To present overseas investment.C. To report the trade achievements.D. To attract the best foreign trade companies.Baktak tabulaba?You probably don't know how to answer that question---unless you happen to be one ofthe about 430 people in the world who speak a language called Matukar Panau. Then you would know it means "What are we doing?" Matukar Panau is one of the world's rarest languages. It is spoken in just two small coastal villages in Papua New Guinea.Several years ago, David Hamson, a language expert, didn't know much aboutMatukar Panau either. No one had ever recorded or even studied its words and rules. Withso few speakers, the language risked disappearing soon. It was endangered.Hamson didn't want that to happen to Matukar Panau. So in 2009, he set out for Papua New Guinea. His goal: use modern technology to help the remaining speakers preservetheir native tongue.But Matukar Panau is far from the only language facing loss. Studies suggest that bythe end of this century, nearly half of the 7,000 languages now spoken worldwide could disappear. They're in danger partly because the only people left speaking them are elderly adults. When those individuals die, their language will die with them. In addition, childrenmay discard a native language and instead use more common global languages, such as Chinese, English or Spanish.In the United States alone, 134 native American languages are endangered. "language hotspots" exist all over the world. These are places with endangered languages that haven't been recorded. They include the state of Oklahoma, pockets of central and eastern Siberia, parts of northern Australia and communities in South America.24. What did Harrison go to PaPua New Guinea for?A. Learning their native languageB. Helping preserve their endangered tongueC. Leaning their modern technologyD. Teaching the natives a new language25. The underline word "discard" in Paragraph 4 means .A. hear ofB. pick upC. get rid ofD. learn about26. The last two paragraphs imply that endangered languages are _ .A. dying quickly in SiberiaB. becoming a worldwide problemC. popular in some special placesD. some native tongues27. According to the passage, the author is _ about the endangered languages.A. indifferentB. suspiciousC. supportiveD. concernedCI told my friend Graham that I often cycle two miles from my house to the town centre but unfortunately there is a big hill on the route. He replied, "You mean fortunately." He explained that I should be glad of the extra exercise that the hill provided.My attitude to the hill has now changed. I used to complain as I approached it but now I tell myself the following. This hill will exercise my heart and lungs. It will help me to lose weight and get fit. It will mean that I live longer. This hill is my friend. Finally I comfort myself with the thought of all those silly people who pay money to go to a gym and sit on stationery exercise bicycles when I can get the same value for free. I have a smile of satisfaction as I reach the top of the hill.Problems are there to be faced and overcome. We cannot achieve anything with an easy life. Helen Keller was the first deaf and blind person to gain a university degree. Her activism and writing proved inspirational. She wrote, "Character cannot be developed in ease. Only through experiences of suffering can the soul be strengthened, vision cleared, ambition inspired and success achieved."One of the main determinants of success in life is our attitude towards adversity. From time to time we all face hardships, problems, accidents and difficulties. Some are of our making but many are no fault of our own. While we cannot choose the adversity, we can choose our attitude towards it.Douglas Bader was 21 when in 1931 he had both legs cut off following a flying accident. He was determined to fly again and went on to become one of the leading flying aviators in the Battle of Britain with 22 aerial victories over the Germans . He was an inspiration to others during the war. He said, "Don't listen to anyone who tells you that you can't do this or that. That's nonsense. Make up your mind, you'll never use crutches or a stick, and then have a go at everything. Go to school, and join in all the games you can. Go anywhere you want to. But never, never let them persuade you that things are too difficultor impossible."The biographies of great people are full of examples of how they took steps toovercome the difficulties they faced. The common thread is that they did not become depressed. They chose their attitude. They chose to be positive. They took on the challenge. They won. Nevertheless, there is still the problem of how you change your attitude towards adversity.28. Which of the following is true according to the author of the passage?A. Those who want to achieve success can't expect to live an easy life.B. Climbing hills on bicycles is the best way to take exercise.C. Going to a gym is greatly beneficial to people's health.D. People's attitude to hardships is the only factor of their success.29. By quoting what Douglas Bader said, the author intends to tell us " ."A. Failure is the mother of success.B. A bad workman quarrels with his tools.C. Nothing is difficult to the man who will try.D. If you risk nothing, you will have nothing.30. Following this passage, the author will further talk about . .A. how his friend helped him to change his attitude towards the challenge he facedB. why it is important to keep optimistic in face of troubleC. what steps to take to change your attitude towards the difficulty you faceD. what great people have in common31. Which of the following can best function as the title of the passage?A. Different attitudes towards misfortuneB. Face difficulties with a smileC. Nothing is impossibleD. Life is full of adversityDAdding math talk to story time at home is a winning factor for children's math achievement, according to a new research from a university. The study from psychologistsSian Beilock and Susan Levine shows a marked increase in math achievement amongchildren whose families used Bedtime Math, an iPad app that delivers engaging math story problems for parents and children to solve together.Even children who used the app with their parents as little as once a week saw gains in math achievement by the end of the school year. The app's effect was especially strong for children whose parents tend to be anxious or uncomfortable with math.Previous research from this group has demonstrated the importance of adults' attitudes about math for children's math success. For example, a recent study found thatmath-anxious parents who help their children with math homework actually weaken their children's math achievement.The new findings demonstrate that structured, positive interactions around math athome can cut the link between parents' uneasiness about math and children's low math achievement."Many people experience high levels of anxiety when they have to solve a math problem, with a majority of adults feeling at least some worries about math," said Beilock, professor in Psychology and author of Choke, a book about stress and performance. "These math-anxious parents are probably less likely to talk about math at home, which affectshow competent their children are in math. Bedtime Math encourages a dialogue between parents and kids about math, and offers a way to engage in high-quality math interactions in a low-effort, high-impact way."Study participants included 587 first-grade students and their parents. Families were given an iPad installed with a version of the Bedtime Math app, with which parents and their children read stories and answer questions involving math, including topics like counting, shapes and problem-solving. A control group received a reading app that had similar stories without the math content and questions related to reading comprehension instead. Children's math achievement was assessed at the beginning and end of the school year. Parents completed a questionnaire about their nervousness with math.The more times parents and children in the math group used the app, the higher children's achievement on a math assessment at the end of the school year. Indeed, children who frequently used the math app with their parents outperformed similar students in the reading group by almost three months in math achievement at year's end.32. Bedtime Math is an iPad app that _ .A. requires parents and children to answer reading comprehension questionsB. assesses children's math achievement and parents' nervousness with mathC. encourages children together with their parents to solve math story problemsD. teaches children how to count, recognize shapes and solve practical problems33. The previous study found that____.A. help from math-anxious parents improves children's math achievementB. interactions around math at home will cut off the family relationshipC. children's math achievement is related to parents' attitude about mathD. children can achieve more success if they see the importance of math34. We can infer from the passage that____.A. it is the math problems related to the stories that make the great differenceB. children whose parents are uneasy about math are superior to other studentsC. Parents using the app for three months can see gains in math achievementD. the frequency of using the app has nothing to do with children's achievement35. What does the author want to tell us?A. High-anxiety parents influence children's attitude about math.B. Frequent use of app can develop problem-solving ability.C. Low-effort activities create good parent-child relationship.D. High-quality math interactions improve children's performance.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。