复习题词汇与语法

复习题词汇与语法1、The______ofpistonmovementiscalledTDC(topdeadcenter).A、upperlimitB、lowerlimitC、limit2、The______ofpistonmovementiscalledBDC(bottomdeadcenter).A、lowerlimitB、upperlimitC、limit3、A_____ispistonmovementfromTDCtoBDCorfromBDCtoTDC.A、strokeB、stageC、state4、The_____isrotatedasthepistonispusheddownbythepressureaboveit.A、crankshaftB、crankpinC、break5、Theactions______canbedividedintofourstages,orstrokes.A、takenplaceintheenginecylinderB、takingplaceintheenginecylinderC、takeplaceintheenginecylinder6、Inotherwords,thepistoncompletesastroke_____itchargesitsdirectionofmotion.A、everytimeB、eachtimeC、eachtimes7、”Stroke”______pistonmovement.A、refertoB、referstoC、preferto8、Astrokeoccurs_______thepistonmovesfromonelimitingpositiontotheother.A、whileB、whenC、which9、BythetimethepistonreachesTDC,themixture________toaslittleasone-tenthofitsoriginalvolume,oroverless.A、hadbeencompressedB、hasbeencompressedC、compressed10、Whentheair-fuelmixtureiscompressed,________doesthepressureinthecylindergoup,______thetemperatureofthemixture_______increases.A、notonly…butalsoB、notonly…butandC、not…but11、Thecylinderpressure________asmuchas3-5Mpaorevenmore.A、goupB、increasesC、add12.Butasthehigherpressuresiscalledupontowithstandverymuchgreaterstresseshigherpressuresincylinders.A.becauseB.becauseofC.dueto13.Thedieselengineismoreefficient,becauseithighercompressionratio.A.haveB.hasC.had14.Thisadvantagepreventsthedieselenginereplacingthegasolineengineinsomeautomobilesandairplanes.A.toB.forC.from15.Inanyinternalcombustionengineburningfuelheatsairconsequently.A.whichB.thatC.when16.Weallknowthatdieselengines()workinthesamewayasgasolineenginedo.A.inprincipleB.inotherwordsC.inturn17.Upto40percentofthechemicalenergyoftheburningfuelchangedintomechanicalenergy.A.willbeB.wouldbeC.maybe18.Asitwere,intowaitingchargeattherequiredinstant.A.aB.anC.the19.Ithasmoresubstantialconstructionandisthusheavier.A.tobeofB.tobeC.tobethat20.Thesameseriesofeventstakeplaceagainandcontinuetheengineruns.A.whenB.asC.aslongas1.Whatdoweseefromtheparagraphs?()A.Whatisstroke?B.Whatisengine?C.Whatiscylinder?2.WhichoneStatementistrueaccordingtheabovefirstparagraph?()A.Afour-stroke-cycleenginemeansthatfourstrokesisrequiredwhenitfinishthewholecycle.B.AstrokeisnotpistonmovementfromTDCtoBDC,butfromBDCtoTDC.C.ThelowerlimitofpistonmovementiscalledTDC(topdeadcenter).3.WhatisBDCinthetermofautomobileindustry?()A.Bottomdeadcenter.B.Topdeadcenter.C.NeitherofAandB.4.WhichoneStatementisTRUEaccordingthelastparagraph?()A.Thefourstrokesoccurintwocrankshaftrevolutions.B.Thefourstrokesoccurinfourcrankshaftrevolutions.C.Thefourstrokesoccurinonecrankshaftrevolutions.5.WhichoneStatementisTUREaccordingthearticle?()A.Thefourpistonstrokesareintake,compression,power,andexhaust.B.Thefourpistonstrokesareintake,compression,power,andinhauls.C.Thefourpistonstrokesareintake,combining,power,andexhaust.1、Themixtureisdeliveredtotheengineitisburned.AwhereBwhichCwho2、Theenginerequiresafuelsystemtosupplyitamixtureofairandfuel.AofBoffCwith3、Themotioniscarriedthroughthepowertraintothecarwheelssothattheyrotateandthecarmoves.ArotaryBrevolveCrevolution4、thecylinderpressuretoasmuchas3－5MPaorevenmore.AraiseB.increaseC.increases5、Inwords,thepistoncompletesastrokeeachtimeitchangesitsdirectionofmotion.AotherBanotherCtheother