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1、沈阳铁路实验中学2018-2019学年度下学期阶段考试（6月）试题高一英语时间：100分钟分数：120分本试卷分第I卷（选择题）和第II卷（非选择题）两部分。考试结束，将本试卷和答题卡一并交回。第Ⅰ卷第一部分:阅读理解(共两节，满分35分)第一节（共10小题；每小题2.5分，满分25分）ATheideafortrafficlightsbeganinthe1800swhenasystemwasrequiredtocontroltheever-increasingflowofhorse-drawntraffic.In1868,inLo
2、ndon,asignalwasinstalled(安装)atthecrossingofGeorgeStreetandBridgeStreet,nearParliament.Thisprovidedwalkerswithasafecrossing.Thesystemcontainedasemaphore（信号标）—atallpostwithmoveablearms.Whenthearmswerepositionedsidewaysitmeantstop.Afterdark,agaslightwaslitatthetop.Thegre
3、encoloredglassmeantgo,whileredmeantstop.Atfirst,signalswerecontrolledbyhand,withofficersdecidingwhenthesignalsshouldbechangedaccordingtotrafficflow.Theyblewawhistletowarndriversthatthesignalwasgoingtochange.However,in1869,atrafficsignalexplodedfollowingaleak（泄露）inoneo
4、fthegaslinesbelow,severelyinjuringthepolicemanoperatingit.ThisledtothesemaphoreprojectbeingdroppedinLondon.TheninUtahin1912,PolicemanLesterWiredevelopedthefirstelectriclightsystemwithredandgreenlights.Twoyearslater,thefirstelectricsignalwasinstalledinCleveland.Itwasba
5、sedonadesignbyJamesHogeandallowedthepoliceandfirefighterstocontrolthesignalsincaseofemergencies.InDetroit,WilliamPotts,alsoapoliceofficer,lookedtoadaptrailroadsignals-11-tobeusedonstreetsanddevelopedasystemwithred,yellowishbrownandgreenlights.Hemadethefirstfour-waythr
6、eecoloredtrafficsystem,anditwasinstalledontheWoodwardandMichiganAvenuesinDetroitin1920.Ayearlatertherewere15automatic（自动的）lightsystems.ThefirstelectrictrafficlightstobeinstalledinEnglandwereinPiccadillyCircusin1926.Justover60yearslatertrafficlightsbecamethesubjectofan
7、artinstallationnearLondon’sCanaryWharf.1.Thesecondparagraphmainlytellsreaders________.A.howtheoriginaltrafficlightsfunctionedB.howthesemaphorewasinstalledC.whyawhistlewasneededtocontrolthetrafficD.whysignalsshouldbechangedbytrafficofficers.2.Whywasthesemaphoreprojectd
8、roppedinLondon?A.Itwasnotenvironmentallyfriendly.B.Itwasnoteasytooperate.C.Itturnedouttobeunsafe.D.Itwasexpensivetoafford.3.
