专业英语四级听力-51-真题-无答案

专业英语四级听力-51(总分100,考试时间90分钟)PARTⅠDICTATION1.Listentothefollowingpassage.Altogetherthepassagewillbereadtoyoufourtimes.Duringthefirstreading,whichwillbedoneatnormalspeed,listenandtrytounderstandthemeaning.Forthesecondandthirdreadings,thepassagewillbereadsentencebysentence,orphrasebyphrase,withintervalsof15seconds.Thelastreadingwillbereadatnormalspeedagainandduringthistimeyoushouldcheckyourwork.Youwillthenbegiven2minutestocheckthroughyourworkoncemore.

LifeSpan

PARTⅡLISTENINGCOMPREHENSIONInSectionsA,BandCyouwillheareverythingONCEONLY.Listencarefullyandthenanswerthequestionsthatfollow.SECTIONACONVERSATIONSInthissectionyouwillhearseveralconversations.Listentotheconversationscarefullyandthenanswerthequestionsthatfollow.

Questions1to3arebasedonthefollowingconversation.Attheendoftheconversation,youwillbegiven15secondstoanswerthequestions.

Nowlistentotheconversation.

【点此下载音频文件】1.Whydoesthewomantellthemanthestory?A.Toinformhimaboutaclasshemissed.

B.Becauseheiseatingfishsticks.

C.Becauseshetutorshim.

D.Toencouragehimtoeatahealthierlunch.2.Whyisitimportanttoquickfreezefreshfood?A.Thecellsofplantsandanimalsaredamagedbyslowfreezing.

B.Itsavestimeinthefoodproductionprocess.

C.Itreducestheamountofenergyrequiredtofreezethefood.

D.Thefooddefrostsmorequickly.3.WhatwasClarenceBirdseyesurprisedtolearn?A.Afishcouldsurvivebeingfrozen.

B.Thefishwereeasiertocatchinthewinter.

C.Foodcanbekeptfrozenindefinitely.

D.Solutionsthatfreezeslowlyformlargecrystals.

Questions4to6arebasedonthefollowingconversation.Attheendoftheconversation,youwillbegiven15secondstoanswerthequestions.

Nowlistentotheconversation.

【点此下载音频文件】4.Whathappenedafterthemanbuilthis**puter?A.Heturnedtobecomeanenthusiasticreader.

B.HewentontobuildamachineforhisJuniorHighSchool.

C.Hebecameobsessed**puterengineering.

D.Hewasbrushedbyahook.5.Whatdoesthemanseethefutureofcomputers?A.WewillalwayshavetraditionalPCs.

B.WewillseePowerMacsgettingpopularwithpeople.

C.Computerswillbemorefriendly.

D.Therewillbeaneraofdistributeddevices.6.Whatdoesthemansayaboutthecriticismoftechnology?A.Weshouldignorethecriticism.

B.Weneedtoconsiderwhattechnologymaybringus.

C.Hefeelsbadaboutthecriticism.

D.Hethinksthecriticismisfar-fetched.

Questions7to10arebasedonthefollowingconversation.Attheendoftheconversation,youwillbegiven20secondstoanswerthequestions.

Nowlistentotheconversation.

【点此下载音频文件】7.Whatarespeakersmainlydiscussing?A.Theeffectoftheatmosphereonrainfall.

B.HowconditionsonEarthsupportlife.

C.HowwateroriginatedonEarth.

D.AnewestimateoftheageofEarth.8.Whatdidrecentphotographsfromaspacesatelliteindicate?A.Thesurfaceoftheoceanisexpanding.

B.Volcanicactivityisincreasing.

C.ThesurfaceofEarthcontainstonsofcosmicdust.

D.ThousandsofcometsarecollidingwithEarth'satmosphere.9.Accordingtothenewtheory,wheredidocean**e?A.From**ets.

B.Fromgasesintheatmosphere.

C.Fromundergroundwaterthatrosetothesurface.D.Fromwatervapor.10.Whichgroupdisagreewiththenewtheorydescribedintheconversation?A.Biologists.

B.Geologists.

C.Oceanographers.

D.Astronomers.SECTIONBPASSAGESInthissection,youwillhearseveralpassages.Listentothepassagescarefullyandthenanswerthequestionsthatfollow.

Questions11to13arebasedonthefollowingpassage.Attheendofthepassage,youwillbegiven15secondstoanswerthequestions.

Nowlistentothepassage.

【点此下载音频文件】1.Thespeakertellsthestudentsthattheyarenotlikelytosucceedifthey______.A.aretooselfish

B.doeverythingasothersdo

C.arenotgreedyenough

D.don'tgetarightdegree2.Inthespeaker'sopinion,learningdoesNOTinclude______.A.participatinginnewassignments

B.developingnewskills

C.renewingskills

D.goingtotherightschool3.Theilliterateofthefuturereferstothosepeoplewhocan't______.A.renewtheirknowledge

B.forgettheoldknowledge

C.knowwhattheyaredoing

D.readorwrite

Questions14to17arebasedonthefollowingpassage.Attheendofthepassage,youwillbegiven20secondstoanswerthequestions.

Nowlistentothepassage.

【点此下载音频文件】4.Whenwasthefirstactualradiobroadcastmade?A.OnChristmasEveof1906.

B.OnChristmasEveof1960.

C.OnChristmasEveof1895.

D.OnChristmasEveof1859.5.WheredidDeForestbeginregularradiobroadcasts?A.InMassachusetts.

B.Onships.

C.InNewYork.

D.OnshipsinNewYorkharbor.6.Accordingtothepassage,whoownedreceiversintheearlydaysofradio?A.**municationsofficers.

B.Peoplewhotreatedradiotechnologyasahobby.

C.Peoplewholivedinbigcities.

D.Peoplewithaninterestinmusic.7.Accordingtothepassage,whatdidDavidSarnoffpredictaboutradios?A.Theywouldgetsmallerinsize.

B.Theirsignalswouldtravelfurther.

C.Theywouldbecomelesspopularthantelevision.

D.Theywouldbecommonhouseholditems.

Questions18to20arebasedonthefollowingpassage.Attheendofthepassage,youwillbegiven15secondstoanswerthequestions.

Nowlistentothepassage.

【点此下载音频文件】8.Accordingtothepassage,whatwerethebeliefsoftheGreekphilosophersbasedupon?A.HowthenaturalworldwasdescribedinGreekmythology.

B.Whattheyobserveddirectly.

C.Thewritingsofphilosophersfromothersocieties.

D.Measurementsmadewithscientificinstruments.9.WhatdoesthespeakersayaboutancientGreekswhotraveledsouth?A.TheynoticedanapparentchangeinthepositionoftheNorthStar.

B.Theyobservedeclipsesatdifferenttimesoftheyear.

C.Theywerethefirsttoestimatethedistancebetweenheavenlybodies.

D.TheywantedtoprovethattheEarthwasflat.10.Whatdoesthespeakersaythetermstadiumrefersto?A.Aplaceformakingastronomicalobservations.

B.Aninstrumentusedforobservingstars.

C.Aunitofmeasurement.

D.TheNorthStar.SECTIONCNEWSBROADCASTInthissection,youwillhearseveralnewsitems.Listentothemcarefullyandthenanswerthequestionsthatfollow.

Questions21and22arebasedonthefollowingnews.Attheendofthenewsitem,youwillbegiven10secondstoanswerthequestions.

Nowlistentothenews.

【点此下载音频文件】1.WheredoestheTropicalstormmakelandfall?A.InEscambiaCounty.

B.AlongtheGulfCoast.

C.Inpensacolaarea.

D.AlongtheMexicanGulfCoast.2.Whoareallowedtoreturnhometonight?A.Theevacuatedresidents.

B.EscambiaCountyspokeswomanSonyaSmith.

C.Peoplewhofighthurricane.

D.Peoplewhofighttropicalstorm.

Questions23and24arebasedonthefollowingnews.Attheendofthenewsitem,youwillbegiven10secondstoanswerthequestions.

Nowlistentothenews.

【点此下载音频文件】3.UntilJanuary1st,CongressandthePresidenthavetoagreeontheplanto______.A.cutthegovernment'sspending

B.decreasethecountry'sdebt

C.lowertaxesforallAmericans

D.reducethepovertyrate4.WhatwillhappeniftheCongressdoesn'tact?A.Medicarepaymentwilldropsharplyby10%.B.Manycitieswillbeabletopayitsdebts.

C.Defensespendingwillbedecreased.

D.Morefamilieswillgohiking.

Questions25and26arebasedonthefollowingnews.Attheendofthenewsitem,youwillbegiven10secondstoanswerthequestions.

Nowlistentothenews.

【点此下载音频文件】5.Whatisthemainideaofthenewsitem?A.Afirebrokeoutwhenpeoplewerebusyscoopingupthepetrol.

B.Morethan100peoplewereengulfedbyflames.

C.Afirecausedbygasspillput57peopletodeath.

D.Asthepetrolstartedtospill,localpeopleranupwithcanstocollectit.6.Accordingtotheofficials,thetotaldeathis______.A.57

B.60

C.86

D.67

Questions27and28arebasedonthefollowingnews.Attheendofthenewsitem,youwillbegiven10secondstoanswerthequestions.

Nowlistentothenews.

【点