2008年12月大学英语六级考试真题及参考答案

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1、大学生电脑主页-www.dxsdiannao.com大学生必上的网站2008年12月六级真题及答案(A卷)PartIwriting(30minutes)Howtoimprovestudent'smentalhealth1、大学生的心理健康十分重要2、因此，学校可以......3、我们自己应当......注意：此部分试题在答题卡1上PartIIReadingComprehension(Skimmingandscanning)(15minutes)　　SupersizesurpriseAskanyonewhythereisanobesityepidemicandtheywilltell

2、youthatit’saldowntoeatingtoomuchandburningtoofewcalories.Thatexplanationappealstocommonsenseandhasdominatedeffortstogettotherootoftheobesityepidemicandreverseit/yetobesityresearchersareincreasinglydissatisfiedwithit.Manynowbelievethatsomethingelsemusthavechangedinourenvironmenttoprecipitate(促成

3、)suchdramaticrisesinobesityoverthepast40yearsorso.Nobodyissayingthatthe“bigtwo”–reducedphysicalactivityandincreasedavailabilityoffood–arenotimportantcontributorstotheepidemic,buttheycannotexplainitall.Earlierthisyearareviewpaperby20obesityexpertssetoutthe7mostplausiblealternativeexplanationsfo

4、rtheepidemic.Heretheyare.1.NotenoughsleepItiswidelybelievedthatsleepisforthebrain,notthebody.Couldashortageofshut-eyealsobehelpingtomakeusfat?Severallarge-scalestudiessuggesttheremaybealink.Peoplewhosleeplessthan7hoursanighttendtohaveahigherbodymassindexthanpeoplewhosleepmore,accordingtodataga

5、theredbytheUSNationalHealthandNutritionExaminationSurvey.Similarly,theUSNurses’HealthStudy,whichtracked68,000womenfor16years,foundthatthosewhosleptanaverageof5hoursanightgainedmoreweightduringthestudyperiodthanwomenwhoslept6hours,whointurngainedmorethanwhosewhoslept7.It’swellknownthatobesityim

6、pairssleep,soperhapspeoplegetfatfirstandsleeplessafterwards.Butthenurses’studysuggeststhatitcanworkintheotherdirectiontoo:sleeplossmayprecipitateweightgain.Althoughgettingfiguresisdifficult,itappearsthatwereallyaresleepingless.In1960peopleintheUSsleptanaverageof8.5hourspernight.A2002pollbytheN

7、ationalSleepFoundationsuggeststhattheaveragehasfallentounder7hours,andthedeclineismirroredbytheincreaseinobesity.大学生电脑主页（网址导航）-www.dxsdiannao.com大学生电脑主页-www.dxsdiannao.com大学生必上的网站2.ClimatecontrolWehumans,likeallwarm-bloodedanimals,canke