2021山东职称英语考试真题卷(1).docx
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1、2021山东职称英语考试真题卷(1)本卷共分为1大题50小题,作答时间为180分钟,总分100分,60分及格。一、单项选择题(共50题,每题2分。每题的备选项中,只有一个最符合题意) 1.第三篇 Eat More,Weigh Less,Live Longer Clever genetic detective work may have found out the reason why a near。starvation diet prolongs the life of many animals Ronald Kahn at Harvard Medical School in Boston,U
2、S,and his colleagues have been able to extend the lifespan(寿命)of mice by 18 per cent by blocking the rodents(啮齿动物) increase of fat in specific cellsThis suggests that thinness-and hot necessarily diet-promotes long life in “ calerie (热量卡) restricted” animals “Its very cool work”says aging researcher
3、 Cynthia Kenyon of the University of California,San Francisco“These mice eat all they want,lose weight and live longerIts like heaven” Calorie restriction dramatically extends the lifespan of organisms as different as worms and rodentsWhether this works in humans is still unknown,partly because few
4、people are willing to submit to such a strict diet But many researchers hope they will be able to trigger the same effect with a drug once they understand how less food leads to a longer lifeOne theory is that eating less reduces the increase of harmful things that can damage cellsBut Kahns team won
5、dered whether the animals simply benefit by becoming thin To find out。they used biology tricks to disrupt the insulin(胰岛素)receptor(受体)gene in lab mice_but only in their fat cells“Since insulin is needed to help fat cells store fat,these animals were protected against becoming fat,”explains Kahn This
6、 slight genetic change in a single tissue had dramatic effectsBy three months of age,Kahn,s modified mice had up to 70 per cent less body fat than normal control mice,despite the fact that they ate 55per cent more food per gram of body weight In addition,their lifespan increasedThe average control m
7、ouse lived 753 days,while the thin rodents averaged a lifespan of 887 daysAfter three years,all the control mice had died,but one-quarter of the modified rodents were still alive “That they get these effects by just manipulating t11e fat cells is controversial,”says Leonard Guarente of the Massachus
8、etts Institute of Technology, who studies calorie restriction and aging But Guarente says Kahn has yet to prove that the same effect is responsible for increased lifespan in calorierestricted animals“It might be the same effect or there might be two routes to long life,”he points out,“and that would
9、 be very interesting”Ronald Kahn and his colleagues can make mice live longer byAoffering them less foodBgiving them a balanced dietCdisrupting the specific genes in their fat cellsDpreventing them growing larger 2.Winners and Losers Why are the biggest winners in the past decade of trade globalizat
10、ion mostly in South and East Asia,whereas the biggest losers are mostly in theformer Soviet bloc(集团)andsubSaharan Africa History is a partial guide:East Asia has a long trading tradition,lately reinvigorated(给以新的活力)by the Chinese adoption of market economicsThe Soviet Union,on the other hand,was she
11、ltered from freemarket forces for more than 70 yearsIn Africa,some countries are disadvantaged because of inadequate infrastructure(基础结构);many countries have little to trade but commodities,the prices of which have fallen in recent years In some regions,certain countries have suffered by adopting mi
12、sguided policies,oftenunder pressure from International Monetary FundFirst among these is Russiawhich in theearly 1990s tried to embrace capitalism before first building the institutions that make capitalism work,such as an independent bank system,a system of business law, and all adequate method fo
13、r collecting taxesEncouraged by the IMF the World Bank and the USDepartment of the Treasury, President Boris Yeltsins regime privatized the stateowned industrial sector, creating a class of oligarchs(寡头政治集团成员),who,knowing how unstable conditions were at homesent their money abroad instead of investi
14、ng it at home In contrast,China,the biggest winner from globalization,did not follow the IMF formulaOf the former states of the Soviet bloc,only a few,notably Poland and Hungary, managed to grow, which they did by ignoring IMF advice and adopting expansionary plansincludingspending more than they co
15、llected in taxesBotswana and Uganda are also Success stories:despite their disadvantages,their countries achieved vigorous growth by creating stable civil societies,liberalizing trade and implementing reforms that ran counter to IMF prescriptionsAll African countries followed the IMF formulaARightBW
16、rongCNot mentioned 3.Stanford University1 Stanford University, famous as one of northern Californias several institutions of higher learning,is sometimes called “the Harvard of the West” The closeness of Stanford to San Francisco,a city thirty-two miles to the north,gives the university a decidedly
17、cosmopolitan (世界性的) flavor2 The students are enrolled mainly from the western United StatesBut most of the fifty states send students to Stanford,and many foreign students study here,as wellAnd standards for admission remain highYoung men and women are selected to enter the university from the upper
18、 fifteen percent of their high school classes3 Not only because of me high caliber(素质)of its students but also because of the desirablelocation and climate,Stanford has attracted to its faculty some of the worlds most respectedscholarsThe university staff has included many Nobel prize winners such a
19、s DrFelix Bloch,DrRobert Hofstadter, and DrWilliam Shockley in physicsDrAuthor Kornberg and DrJoshuaLederberg in medicineand DrPaul JFlory and DrLinus Pauling in chemistryThe Russiannovelist Aleksandr Solzhenistsyn has been in residenceStanfordS undergraduate school of engineering and its graduate s
20、chools of business,law,and medicine are especially well-regarded4 What is student life like on “The Farm” Culturallythe campus is a magnet for bothstudents and citizens of nearby communitiesP1ays,concerts,and operas are performed in the universitys several auditoriums and in its outdoor theater, whe
21、re graduations are also heldSeveral film series are presented during the school yearGuest lecturers from public and academic life frequently appear on campusIn the evenings,many students gather to socialize in the Student Unions coffee house;here the beverages(饮料)and the atmosphere both have a decid
22、edly European flavorFor the sportsminded,the Stanford campus offers highly developed athletic facilitiesTeam spots,swimming,and track and field activity are a11 very much part of the Stanford pictureSo are bicycling and jogging5 In addition to financial support from alumni(校友),Stanford receives gran
23、ts from thegovernment and from private philanthropic(慈善的)foundations。In recent years,governmentgrants have made possible advanced studies in the fields of history, psychology, education,and atomic energyAt present Stanford is carrying out an ambitious building program,financed in part by山e Ford Foun
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