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1、大学英语三级考试试卷I.ReadingComprehension(30%)PassageOneTread(踩)softlyinthegardenandpluckthatrosewithcare;flowerscrywhencut,cucumbersscreamandevenhealthyfruitgurgles(发出咯咯声)accordingtonewacousticresearchonthestressfullifeofplants.Thefindings,releasedbytheInstituteforApplied
2、PhysicsattheUniversityofBonn,couldhaveimportantimplicationsforfarmerssince,withthepropereavesdroppingdevice,onecannowdistinguishbetweenhealthyandsickvegetables.Talkingtoplants,itseems,isnotasrewardingaslisteningtothem.TheBonnscientistshavedevelopedlaser-drivenmicr
3、ophonesthatpickupsoundsinaccessibletothehumanear.Whenaleaforastemissliced,theplantsignalspain(orperhapsmerelydismay)byreleasingthegasethylene(乙烯)overitsentiresurface.DoctorFrankKuhnemannofBonnUniversityhasbeentrappingtheethyleneinabelljar.Thegasmoleculesarelaterbo
4、mbardedwithlaserbeams,whichmakesthemvibrate.Thisproducesasoundwavepickedupbythemicrophones."Themoreaplantissubjectedtostress,thelouderthesignalwegetonourmicrophone,"hesaid.(Byeavesdroppingonplantsitshouldbepossibletodevelopanearlywarningsystemtodetectpestsanddisea
5、se).Knowingthestressleveloffruitandvegetablescanalsobeanaidinefficientstoringandtransporting.Acousticalevidencedemonstratesthatapplesemithigherlevelsofethylene,whichcausesneighboringplantstowilt(枯萎).Asaresult,thescientistsurgedfruitproducerstostoreapplesseparately
6、.1.Thefirstparagraphtellsusthat_____.A.plantsalsohavefeelingslikehumanbeingsB.plantsmayhavedifferentreactionstodifferenttreatmentsC.weshouldnotcutflowersD.healthyfruitwillcry2.Thefindings'implicationliesinthat_____.A.wecanknowmoreaboutplantsthroughtalkingtothemB.w
7、ecanhelpplantgrowbyplayingmusicforthemC.withacousticdevice,wecanknowaboutthesituationaplantisinD.withthehelpofeavesdropping,wecanhearplantstalking3. Intheexperiment,_____isnotused.A.ajarB.microphonesC.abellD.laserbeams4. Accordingtothepassage,plantscan_____.A.danc
8、etothemusicB.listentopeopletalkC.betrappedbylaserbeamsD.releasethegasethylene5.Throughtheexperimentweknowthat_____.A.weshouldnotstoreapplestogetherwitht
