《四级模拟试题》word版

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

2、thecenter.PassageOneQuestions21to25arebasedonthefollowingpassage.Designofallthenewtoolsandimplementsisbasedoncarefulexperimentswithelectronicinstruments.First,ahuman“guineapig”istestedusingaregulartool.Measurementsaretakenoftheamountofworkdone,andthebuildupofheatinthebody.Twistedjointsandstretch

3、edmusclescannotperformaswell,ithasbeenfound,asjointsandmusclesintheirnormalpositions.Thesamepersonisthentestedagain,usingatooldesignedaccordingtothesuggestionsmadebyDr.Tichauer.Allthesetestshaveshownthegreatimprovementofthenewdesignsovertheold.OneoftheelectronicinstrumentsusedbyDr.Tichauer,themy

4、ograph（肌动记器）,makesvisiblethroughelectricalsignalstheworkdonebyhumanmuscle.Anothermachinemeasuresanydangerousfeaturesoftools,thusprovinginformationuponwhichtobaseanewdesign.Oneconclusionoftestsmadewiththismachineisthatatripodstepladderismorestableandsafertousethanonewithfourlegs.Thisworkhasattrac

5、tedtheattentionofefficiencyexpertsandtime-and-motion-studyengineer,butitsvaluegoesfarbeyondthat.Dr.Tichauer’sfirstthoughtisforthehealthofthetooluser.Withtherepeateduseofthesametoolalldaylongonproductionlinesandinotherjobs,evenlightmanualworkcanputaheavystressononesmallareaofthebody.Intime,suchst

6、resscancauseadisablingdisease.Furthermore,musclefatigueisaserioussafetyhazard.Efficiencyistheby-productofcomfort,Dr.Tichauerbelieves,andhisnewdesignsfortraditionaltoolshaveprovedhispoint.21.Whatareinvolvedinthedesignofanewtoolaccordingtothepassage?A)Electronicinstrumentsandaregulartool.B)Ahuman“

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