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时间:2018-08-02
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1、Unit1SourcesofEnergyKeytoTextAEx.11.C2.C3.B4.D5.B6.AEx.21.Theoceanorganismssettledownintotheoozeunderlyingshallowarmsoftheoceanunderconditionsofoxygenshortage.Thenitsfataccumulates,istrappedunderfurtherlayersofooze,undergoesminorrearrangementsofatoms
2、andfinallyispetroleum.2.Onthesurfaceofporousrocksandinaslowlyaccumulatingpoolbelowthenonporousrocks.3.Becauseinternalcombustionenginesweredeveloped,whichwerepoweredbytheexplosionofmixturesofairandinflammablevaporsandthemostconvenientinflammablevaporw
3、asthatderivedfromgasoline,apetroleumfraction.4.(1)PetroleumexistsonEarthinfarsmallerquantitiesthancoaldoes.(2)Petroleumisnotnearlysoevenlydistributedascoalis.5.Itsenormousconsumptionofpetroleumismakingitanoilimporter.6.Thepoliticalproblemsalreadycaus
4、edbypetroleum.Ex.31.A2.C3.D4.A5.B6.A7.A8.B9.B10.DEx.41.organic2.originate3.decompose4.rearrangement5.overlain6.prospector7.inflammable8.substantial9.complication10.consumptionEx.51.C2.A3.A4.D5.B6.C7.A8.C9.C10.D11.D12.C13.C14.A15.D16.C17.B18.A19.B20.D
5、Ex.61.sedimentaryrocks2.petroleumreserves3.internalcombustionengines4.theboilingpoint5.fattysubstance6.少量7.源自8.易燃蒸汽9.地质结构10.在……领土Ex.71.含有石油的岩石几乎都来源于海洋,所以形成石油的有机物一定是海洋生物,而不是树木。2.其脂肪不是分解腐烂,而是逐渐积聚,并在深层的淤泥里圈闭起来,进而经过细微的原子重组,最终形成石油。3.一旦获得石油,可以通过地上管道运输,而不必象
6、煤一样,由运货车经过繁重的装卸任务来运输。4.这种内燃机与蒸汽机相比,机身小巧,可以瞬间启动;而蒸汽机需要一定时间,等待储水加热到沸点。5.石油相对于煤的便利却被另一个事实所抵消:地球上石油的数量比煤少得多。Ex.81.Asisknowntoall,waterconsistsofhydrogenandoxygenatoms.2.Themyriadsoflivingcreaturesbeneaththeseaformthecolorfulundergroundworld.83.Itisimposs
7、ibletobedependentonimporttodevelopournationaleconomy.4.Fuelderivedfrommunicipalwastecannotonlygenerateelectricitybutalsoprovideheat.5.Whateverobstacleswemightmeet,wewillcarrythroughthisexperiment.UnitThreeKeytoTextAEx.11.B2.A3.B4.D5.DEx.2(Forreferenc
8、eonly)1.Forinstancewehavehigh-performancesystemsthatcanrecognizetensofthousandsofwords.Wehavespecialspeech-recognitionsoftwarefordictation.Therearealsoothersystemswhichcanacceptextemporaneouslygeneratedspeechoverthetelephone.Andwehavetechnologyinvirt
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