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1、2013春《大学英语4》综合复习资料I.ReadingComprehensionPassage1Forages,sailorshavesaidthatitisgoodlucktoseedolphinsswimmingalongsideboats.Theirpresencemeantthatlandwasnear,whichwouldbevitalinformationifaboatandhercrewwereindanger.Somedolphinshaveevenprotectedshipwreckedsailorsfromsharks.Itisnowonderth
2、attheseuniqueandfascinatingcreatureshavelongbeenknownasourfriends.Youmaythinkdolphinsarefish,buttheyareactuallymammals.Theyarerelatedtowhalesandporpoises,andtheyevolvedaround10millionyearsago.Dolphinsbreatheair,givebirthtoliveyoung,andfeedthemmilk.Theyaresocialanimals,livingtogetheringr
3、oupsranginginsizeofupto12.Inplacesrichinfood,manyschoolscancombinetogethertoformschoolsofupto1,000dolphins.Dolphinsarethoughttobeintelligentanimalsbecauseoftheirplayfulness,curiosity,andquickabilitytolearn.Theyseemtocommunicatewitheachotherthroughacombinationofsqueaks,whistles,andclicks
4、.Whilescientistsdon'tknowwhattheyaregoingonabout,itisthoughtthatdolphinsaretellingeachotherthatfoodisnearby,orwarningeachotherofapproachingdanger.Dolphinsusesonartodiscoveranobject'ssize,shape,andlocation.Bysendingoutaseriesofclicksandreceivingtheechothatbouncesofftheobject,theycandiffe
5、rentiatebetweenasharkandaboat.Unfortunately,dolphinshavefacedincreasingdangerinrecentyears.Fishermeninpursuitofprofitabletunamayaccidentallytrapdolphinsintheirnets,killingthemintheprocess.Theseintelligentmammalsoftheseadeserveourprotectionandrespect.1.Dolphinshavebeenhuman'sfriendsbecau
6、seof_______D_____.A.sailorsmayknowthatthelandisnotfarawayB.somedolphinsprotectsailorsfromsharkattacksC.sailorscancommunicatewiththemD.bothAandB2.Whichofthefollowingstatementaboutdolphinisnottrue?AA.Dolphinslayeggsunderthesea.B.Dolphinscancommunicatewitheachotherbysendingoutsounds.C.Dolp
7、hinshaveabilitiestolearn.D.Dolphinsprefertoliveingroupsuptohundreds.3.Howdodolphinscommunicatewithoneanother?DA.Throughradiowaves.B.Bysendingoutgases.C.Byclappingtheirfinstogether.D.Throughvariousnoises.4.Accordingtothearticle,whatmakesathreattodolphins?DA.Whales.B.Tuna.C.Sailo
