大学英语四练习题

大学英语四练习题

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时间:2019-10-22

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1、ModelTestOnePartIWriting(30minutes)Directions:Inthispart,youareallowed30minutestowriteashortessayentitledShouldUniversitiesHelpStudentsforEmployment?Youshouldwriteatleast120wordsfollowingtheoutlinegivenbelow:1大学主就业形势越来越严峻,使人们开始思考人学教育的功能问题2大学是否应该为学生提供就业帮助,我认为……3对大学教育功能问题的总结PassageOne

2、Questions57to61arebasedonthefollowingpassage.Mostpeoplewithallergiesconsiderthemanuisanceatbestwhilemoreseriouscasescanbelife-threatening,thescientistsnowclaimthattheyhaveanupside・Hayfeverandeczema(湿疹)couldbeyourbody^sdefenseagainstcancer.Allergysymptoms,likesneezingorarunnynose,get

3、ridofforeignparticlesintheair,whichmaybecapableofcausingcancer,theresearcherssay.Theymayalsoactasawarningthatalertsustoknowwhentherearedamagingsubstancesintheairthatshouldbeavoided・Infact,leadresearchersPaulSherman,fromCornellUniversityinNewYork,andhisteamwarnedthattakingdrugstosupp

4、ressallergiescouldbeabadidea.Expertshavelongsuspectedthatallergiesmaybelinkedtocancer,butuntilnowtheevidencehasbeenunconvincing.Somestudiesfoundthatcancerpatientswerelesslikelytohaveallergies,whileothertrialsfoundtheopposite.Inthelateststudy,Shermanandhisteamexaminedtheresultsofalmo

5、st650studiesperformedoverthepastfivedecades・Overall,cancerpatientshadfewerallergiesthanpeoplefreeofcancer,theyreported・Theyassociationwasthestrongestforpeoplewithcancersthatcomeintocontactwithmaterialsoutsidethebody,suchasskincancerandcancerofthroat.Likewise,onlyallergieswithsymptom

6、slinkedtotheoutsideofthebody,suchaseczema,hayfeverandanimalandfoodallergies,werelesscommoninpeoplewithcancer.Somecancers,likebreastcancer,whichareisolatedfromtheexternalenvironment,showedmuchweakerassociations,thescientistsreported.Giventheconcerningresults,Shermanandhisteamcallfors

7、tudiedtotestwhetherturningoffthebody'sallergyreactionswithsomemedicineswillactuallydomoreharmthangood.TheytoldTheQuarterlyReviewofBiology,“Wehopethatourworkwillstimulatereconsiderationoftheprevailingviewthatallergiesaremerelydisordersoftheimmunesystem,whichthereforecanbesuppressedwi

8、thoutanyharm/557.Wh

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