2011北京地区学位英语独家文字版真题与答案

12011北京地区学位英语独家文字版真题与答案北京地区成人本科学士学位英语统一考试PartIReadingComprehension(30%)Directions:Therearethreepassagesinthispart.Eachpassageisfollowedbysomequestionsorunfinishedstatements.ForeachofthemtherearefourchoicesmarkedA,B,CandD.YoushoulddecideonthebestchoiceandblackenthecorrespondingletterontheAnswerSheet.Passage1QuestionsIto5arebasedonthefollowingpassage:Spending50minuteswithacellphoneclosetoyourearisenoughtochangebraincellactivityinthepartofthebrainclosesttotheantenna(天线)．Butwhetherthatcausesanyharmisnotclear,scientistsattheNationalInstituteofHealthsaidataconferencelastmonth,addingthatthestudywillnotlikelysettleconcernsofalinkbetweencellphonesandbraincancer.“Whatweshowedisglucose(葡萄糖)metabolism(代谢)(asignofbrainactivity)increasesinthebraininpeoplewhowereexposedtoacellphoneintheareaclosesttotheantenna，saidDr．NoraVolkowoftheNIH，whosestudywaspublishedintheJournaloftheAmericanMedicalAssociation．(76)Thestudywasmeanttoexaminehowthebrainreactstoelectromagneticfieldscausedbywirelessphonesignals．Volkowsaidshewassurprisedthattheweakelectromagneticradiation(电磁辐射)fromcellphonescouldaffectbrainactivity,butshesaidthefindingsdonotshedanylightonwhethercellphonescausecancer．“Thisstudydoesnotinanywayindicatethat．Whatthestudydoesistoshowthehumanbrainissensitivetoelectromagneticradiationfromcellphoneexposures.”Useofthedeviceshasincreaseddramaticallysincetheywereintroducedintheearlyl980s，withabout5billioncellphonesnowinuseworldwide．Somestudieshavelinkedcellphoneexposuretoanincreasedriskofbraincancers．butalargestudybytheWorldHealthOrganizationdidnotofferaclearanswertothis．Volkow’steamstudied47peoplewhohadtheirbrainexaminedwhileacellphonewasturnedonfor50minutesandanotherwhilethephonewasturnedoff.Whiletherewasnocompletechangeinbrainmetabolism,theyfounda7percentincreaseinbrainmetabolismintheregionclosesttothecellphoneantennawhenthephonewason．(77)Expertssaidtheresultswereinteresting,buturgedthattheybeunderstoodwithgreatcare.“Althoughthebiologicalsignificance，ifany,ofincreasedglucosemetabolismfromtoomuchcellphoneexposureisunknown，theresultsrequirefurtherinvestigation,”HenryLaioftheUniversityofWashingtonintheU.S．andDr．LennartHardellofUniversityHospitalinSweden，wroteinanarticleinJAMA．“Muchhastobedonetofurtherinvestigateandunderstandtheseeffects.”theywrote．1.Accordingtothepassage,whichofthefollowingisTRUE?A.Cellphoneuseisdangerous。B.Cellphoneusecausescancer。C.Thehumanbrainisanelectromagneticfield。D.Thereareabout5billioncellphoneusersintheworldrightnow。2.DoctorVolkowwasastonishedbecause______。A.herresearchhasshedlightonherunderstandingofcellphoneB.shefoundthatcellphoneexposureisharmfultohumanbrainC.shefoundthatusingacellphoneforabout50minutescouldinfluenceorchangebrainactivityD.humanbrainisnotresponsivetoelectromagneticradiation3.Accordingtothepassage,cellphoneswerelaunched_______。A.inthelate1970sB.between1980and1985B.inthelate1980sD.intheearly1990s4.Whatdoestheword“that”standforinthesecondparagraph?A.Brainactivity。B.Herresearchfindings。C.Thefactthatcellphoneusemaycausecancer。D.Herresearchprogress。5.Whichofthefollowingisanappropriatetitleforthispassage?A.CellPhoneRadiation:IsItHarmful?B.CellPhoneRadiati0n:IsItUseful?C.CellPhoneRadiation:IsItHealthy?D.CellPhoneRadiation:IsItWeak?Passage2Questions6to10arebasedonthefollowingpassage:Humanbeingshavealwayshadanabilitytoattendtoseveralthingsatonce．(78)Noriselectronicmultitaskingentirelynew：We'vebeendrivingwhile1isteningtocarradiossincetheybecamepopularinthel930s.ButthereisnodoubtthatmultitaskinghasreachedakindofwarpspeedintheeraofWeb-enabledcomputers,whenithasbecomeroutinetoconductseveralIM(即时通讯)conversations，watchTVandusethecomputerallatonce．Butwhat’stheimpactofthismediaconsumption?Andhowarethesemultitaskingdeviceschanginghowkidslearn，reasonandcommunicatewithoneanother?Socialscientistsandeducatorsarejustbeginningtodealwiththesequestions，buttheresearchersalreadyhavesomestrongopinions．(79)Althoughmultitaskingkidsmaybebetterpreparedinsomewaysfortoday’sfast-pacedworkplace,manyscientistsarepositivelyalarmedbythetrend．Kidsthatareinstantmessagingwhiledoinghomework，playinggamesonlineandwatchingTV，aren’tgoingtodowellinthelongrun．Onthepositiveside，multitaskingstudentstendtobeextraordinarilygoodatfindingandusinginformation．Andprobablybecausemodemchildhoodcentersaroundvisual(视觉的)ratherthanprintmedia，theyareespeciallyskilledatanalyzingvisualdataandimages．Manyeducatorsandpsychologistssayparentsneedtoactivelyensurethattheirteenagersbreakfreeofuncontrollableengagementwithscreensandspendtimeinthephysicalcompanyofhumanbeings—agrowingchallengenotjustbecausetechnologyofferssuchahandyoptionbutbecausesomanykidsleadhighlyscheduledlivesthatleavelittletimeforold—fashionedsocializingandfamilymeals.Indeed，manyteenagersandcollegestudentssayovercommitted(任务过重的)schedulesdrivemuchoftheirmultitasking．Justasimportantisforparentsandeducatorstoteachkidsthatit’svaluable，evenessential，tooccasionallyslowdown，unplugandtaketimetoenjoylifebeyondthescreen.6.Whatisthemainideaofthispassage?A.Howismultitaskingdefine(定义)intheinformationage?B.Ho