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2016年12月大学英语四级考试真题(第3套)PartIWriting(30minutes)Directions:Forthispart,youareallowed30minutestowriteanessay.Supposeyouhavetwooptionsupongraduation:oneistoworkinastate-ownedbusinessandtheotherinajointventure.Youaretomakeachoicebetweenthetwo.Writeanessaytoexplainthereasonsforyourchoice.Youshouldwriteatleast120wordsbutnomorethan180words.PartIIListeningComprehension(25minutes）说明：由于2016年12月四级考试全国共考了2套听力，本套真题听力与前2套内容完全一样，只是顺序不一样，因此在本套真题中不再重复出现。PartⅢReadingComprehension(40minutes）SectionADirections:Inthissection,thereisapassagewithtenblanks.Youarerequiredtoselectonewordforeachblankfromalistofchoicesgiveninawordbankfollowingthepassage.Readthepassagethroughcarefullybeforemakingyourchoices.Eachchoiceinthebankisidentifiedbyaletter.PleasemarkthecorrespondingletterforeachitemonAnswerSheet2withasinglelinethroughthecentre.Youmaynotuseanyofthewordsinthebankmorethanonce.Questions26to35arebasedonthefollowingpassage.Manymenandwomenhavelongboughtintotheideathattherearemaleandfemalebrains,believingthatexplainsjustabouteverydifferencebetweenthesexes.Anewstudy26thatbelief,questioningwhetherbrainsreallycanbedistinguishedbygender.Inthestudy,TelAvivUniversityresearchers27forsexdifferencesthroughouttheentirehumanbrain.Andwhatdidtheyfind?Notmuch.Ratherthanofferevidencefor28brainsasmaleorfemale,researchshowsthatbrainsfallintoawiderange,withmostpeoplefallingrightinthemiddle.DaphnaJoel,wholedthestudy,saidherresearchfoundthatwhiletherearesomegender-based29,manydifferenttypesofbraincan'talwaysbedistinguishedbygender.Whiletheaveragemaleandaveragefemalebrainswere30different,youcouldn'ttellitbylookingatindividualbrainscans.Onlyasmall31ofpeoplehadall-maleorall-femalecharacteristics.LarryCahill,anAmericanneuroscientist(神经科学家),saidthestudyisanimportantadditiontoagrowingbodyofresearchquestioning32beliefsaboutgenderandbrainfunction.Buthecautionedagainstconcludingfromthisstudythatallbrainsarethesame,33ofgender.There'samountainofevidence34theimportanceofsexinfluencesatalllevelsofbrainfunction,hetoldTheSeattleTimes.Ifanything,hesaid,thestudy35thatgenderplaysaveryimportantroleinthebrain--evenwhenwearenotclearexactlyhow.A.abnormalB.appliedC.brieflyD.categorizingE.challengesF.figureG.percentageH.provingI.regardlessJ.searchedK.similaritiesL.slightlyM.suggestsN.tastes0.traditionalSectionBDirections：Inthissection，youaregoingtoreadapassagewithtenstatementsattachedtoit.Eachstatementcontainsinformationgiveninoneoftheparagraphs．Identifytheparagraphfromwhichtheinformationisderived．Youmaychooseaparagraphmorethanonce．Eachparagraphismarkedwithaletter．AnswerthequestionsbymarkingthecorrespondingletteronAnswerSheet2．CanBurglarsJamYourWirelessSecuritySystem?A.Anyproductthatpromisestoprotectyourhomedeservescarefulexamination．Soitisn’tsurprisingthatyou’11findplentyofstrongopinionsaboutthepotentialvulnerabilitiesofpopularhome—securitysystems．B.Themostlikelytypeofburglary(人室盗窃)byfaristheunsophisticatedcrimeofopportunity，usuallyinvolvingabrokenwindoworsomeforcedentry．AccordingtotheFB1．crimesliketheseaccountedforroughlytwo．thirdsofallhouseholdburglariesintheUSin2013．Thewidemajorityoftherestwereillegal．unforcedentriesthatresultedfromsomethinglikeawindowbeingleftopen．TheoddsofacriminalusingtechnicalmeanstobypassasecuritysystemaresosmallthattheFBIdoesn’teventrackthosestatistics．C.Oneofthemaintheoreticalhome—securityconcernsiswhetherornotagivensystemisvulnerabletobeingblockedfromworkingaltogether．Withwiredsetups，thefearisthataburglar(人室盗贼)mightbeabletoshutyoursystemdownsimplybycuttingtherightcable．Withawirelesssetup．youstickbattery—poweredsensorsuparoundyourhomethatkeepaneyeonwindows。doors，motion，andmore．Iftheydetectsomethingwrongwhilethesystemisarmed．they’lltransmitawirelessaleftsignaltoabasestationthatwillthenraisethealarm．Thatapproachwilleliminatemostcord—cuttingconcerns--butwhatabouttheirwirelessequivalent，jamming?withthefightdevicetunedtothefightfrequency，what’stostopathieffromjammingyoursetupandblockingthatalertsignalfromeverreachingthebasestation?D.Jammingconcernsarenothingnew，andthey’renotuniquetosecuritysystems．Anydevicethat’sbuilttoreceiveawirelesssignalataspecificfrequencycanbeoverwhelmedbyastrongersignalcominginonthesamefrequency．Forcomparison．1et’ssayyouwantedto“jam”aconversationbetweentwopeople--allyou’dneedtodoisyellinthelistener’sear．E)Securitydevicesarerequiredtolistthefrequenciestheybroadcaston—matmeansthatapotentialthiefcanfindwhattheyneedtoknowwithminimalGoogling．Theywill．however．needtoknowwhatsystemthey’relookingfor．Ifyouhaveasigninyouryarddeclaringwhatsetupyouuse，that’dpointthemintherightdirection，thoughatthatpoint，we’retalkingaboutahighlytargeted，semi—sophisticatedattack，andnotthesortofforced—entryattackthatmakesupthemajorityofburglaries．It’seasiertofindandacquirejammingequipmentforsomefrequenciesthanitisforothers．F)Wirelesssecurityproviderswilloftentakestepstohelpcombatthethreatofjammingattacks．SimpliSafe，winnerofourEditors’Choicedistinction．utilizesaspecialsystemthat’scapableofseparatingincidentalRFinterferencefromtargetedjammingattacks．Whenthesystemthink