《四级模拟试题》word版.doc

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1、四级模拟试题、答案（一）PartIIReadingComprehension(35minutes)Directions:Thereare4passagesinthispart.Eachpassageisfollowedbysomequestionsorunfinishedstatements.ForeachofthemtherearefourchoicesmarkedA),B),C)andD).YoushoulddecideonthebestchoiceandmarkthecorrespondingletterontheAnswerSheetwithasinglelinet

2、hroughthecenter.PassageOneQuestions21to25arebasedonthefollowingpassage.Designofallthenewtoolsandimplementsisbasedoncarefulexperimentswithelectronicinstruments.First,ahuman“guineapig”istestedusingaregulartool.Measurementsaretakenoftheamountofworkdone,andthebuildupofheatinthebody.Twistedjoin

3、tsandstretchedmusclescannotperformaswell,ithasbeenfound,asjointsandmusclesintheirnormalpositions.Thesamepersonisthentestedagain,usingatooldesignedaccordingtothesuggestionsmadebyDr.Tichauer.Allthesetestshaveshownthegreatimprovementofthenewdesignsovertheold.Oneoftheelectronicinstrumentsusedb

4、yDr.Tichauer,themyograph（肌动记器）,makesvisiblethroughelectricalsignalstheworkdonebyhumanmuscle.Anothermachinemeasuresanydangerousfeaturesoftools,thusprovinginformationuponwhichtobaseanewdesign.Oneconclusionoftestsmadewiththismachineisthatatripodstepladderismorestableandsafertousethanonewithfo

5、urlegs.Thisworkhasattractedtheattentionofefficiencyexpertsandtime-and-motion-studyengineer,butitsvaluegoesfarbeyondthat.Dr.Tichauer’sfirstthoughtisforthehealthofthetooluser.Withtherepeateduseofthesametoolalldaylongonproductionlinesandinotherjobs,evenlightmanualworkcanputaheavystressononesm

6、allareaofthebody.Intime,suchstresscancauseadisablingdisease.Furthermore,musclefatigueisaserioussafetyhazard.Efficiencyistheby-productofcomfort,Dr.Tichauerbelieves,andhisnewdesignsfortraditionaltoolshaveprovedhispoint.21.Whatareinvolvedinthedesignofanewtoolaccordingtothepassage?A)Electronic

7、instrumentsandaregulartool.B)Ahuman“guineapig”andaregulartool.C)Electronicinstrumentsandahuman“guineapig”.D)Electronicinstruments,ahuman“guineapig”andaregulartool.22.Fromthepassageweknowthatjointsandmusclesperformbestwhen__________________.A)theyaretwistedands