英语四级考试的试题与答案

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Designofallthenewtoolsandimplementsisbasedoncarefulexperimentswithelectronicinstruments.First,ahuman“guineapig”istestedusingaregulartool.Measurementsaretakenoftheamountofworkdone,andthebuildupofheatinthebody.Twistedjointsandstretchedmusclescannotperformaswell,ithasbeenfound,asjointsandmusclesintheirnormalpositions.Thesamepersonisthentestedagain,usingatooldesignedaccordingtothesuggestionsmadebyDr.Tichauer.Allthesetestshaveshownthegreatimprovementofthenewdesignsovertheold.

OneoftheelectronicinstrumentsusedbyDr.Tichauer,themyograph肌动记器,makesvisiblethroughelectricalsignalstheworkdonebyhumanmuscle.

Anothermachinemeasuresanydangerousfeaturesoftools,thusprovinginformationuponwhichtobaseanewdesign.Oneconclusionoftestsmadewiththismachineisthatatripodstepladderismorestableandsafertousethanonewithfourlegs.

Thisworkhasattractedtheattentionofefficiencyexpertsandtime-and-motion-studyengineer,butitsvaluegoesfarbeyondthat.Dr.Tichauer’sfirstthoughtisforthehealthofthetooluser.Withtherepeateduseofthesametoolalldaylongonproductionlinesandinotherjobs,evenlightmanualworkcanputaheavystressononesmallareaofthebody.Intime,suchstresscancauseadisablingdisease.Furthermore,musclefatigueisaserioussafetyhazard.

Efficiencyistheby-productofcomfort,Dr.Tichauerbelieves,andhisnewdesignsfortraditionaltoolshaveprovedhispoint.

21.Whatareinvolvedinthedesignofanewtoolaccordingtothepassage?

AElectronicinstrumentsandaregulartool.

BAhuman“guineapig”andaregulartool.

CElectronicinstrumentsandahuman“guineapig”.

DElectronicinstruments,ahuman“guineapig”andaregulartool.

22.Fromthepassageweknowthatjointsandmusclesperformbestwhen__________________.

Atheyaretwistedandstretched

Btheyareintheirnormalpositions

Ctheyaretestedwithahuman“guineapig”

Dtheyaretestedwithelectronicinstruments

23.A“myograph”Para.2,Line1isanelectronicinstrumentthat________________.

Aisabletodesignnewtools

Bmeasurestheamountofenergyused

Cenablepeopletoseethemuscularmovements

Dvisualizeselectricalsignals

24.Itcanbeinferredfromthepassagethat________________.

Aastepladderusedtohavefourlegs.

Bitisdangeroustousetools

Catripodissaferinatooldesign

Dworkersaresaferonproductionlines

25.Dr.Tichauerstartedhisexperimentsinitiallyto_________________.

Aimproveefficiency

Bincreaseproduction

Creduceworkload

Dimprovecomfort

参考答案：

21.D由第一段的前两句综合全体的细节。

22.B见第一段的第四句。

23.C此题考察利用上下文理解生词的才能。单词myograph所在的其次段说，这种仪器makevisiblethroughelectricalsignalstheworkdonebyhumanmuscle，与C根本是同样的'意思。

24.A由第三段的第一句中的“…anewdesign”可知，其次句中提到的atripodladder是anewdesign，相比之下，四条腿的梯子就是anolddesign了，也就是说，过去的stepladder是四条腿的。

25.D此题考察探索细节。