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Unit12TransportationIIPartIIIThenewtrendsofautomobilesClassPlan◼WarmingupNewsBroadcast:practicetheabilityofcatchingkeypointsinthenew◼Discussion:thet

rendsofthedevelopmentoftransportation◼TextanalysisWordsandExpressions◼Keywordselectriccarzerotailpipeemissio

ns零排放battery◼Vocabulary◼Combustion:theprocessofburning◼Ignition:theraisingofasubstancetoitsignitionpoint,asbyelectriccurrent,friction,ormech

anicalshock◼Piston:活塞◼Surge:toincreasesuddenly,usedofelectriccurrentorvoltage◼Hurdle:toovercomeordealw

ithsuccessfully;surmount◼Impact:通用汽车公司的一款实验型电力汽车的名称PartIIITextAnalysis◼TheAmericanautoindustryhasbeenlookingfor

waystorescueitssaggingbottomline.Betterdesignandbetterqualityarecontributingtothebeginningofaturnaround,butlong-termsuccessisgoingtome

anmajorchangesfortheentireindustry.Ensuringthatsuccessinvolvesplanningforanentirelynewtypeofautomobile,onepoweredbyelect

ricity.Theelectriccarisstillsomedistancedowntheroad.(topicpresenting)PartIIITextAnalysis◼It'srushhourinDetroit

,andtheinterstatefreeway,1-94,isjammedwithcarsheadingforhomeafteranotherworkdayinthecity.Lookingdownonthefreewayfroma

noverpass,oneseescarsandtrucksofeverysize,shape,andcolor.(description)◼Butforalloftheirdifferences,thesevehiclesdohaves

omethingincommon:they'reallpoweredbyaninternalcombustionenginerunningongasolineordieselfuel.PartIIITextAnalysis◼Butasau

tomobile-relatedpollutiongrowsworseinmajorurbanareas,governmentalofficialsandenvironmentalistsarepushingautomobilemanufacturersto

designvehiclespoweredbyelectricity.◼Yousee,electriccarshaveabsolutelyzerotailpipeemissions.InDetroit,th

ebigthreeU.S.carcompanieshavespentmillionsresearchingelectricvehicles.Chryslerhasanelectricversionofitspopularminivan;andFord,asmallelectricwagon;b

utnonehasattractedasmuchattentionasGeneralMotors'experimentalelectriccarcalledtheImpact.(theintroductiontoImpact)PartIIITextAnalysis◼That'stheso

undoftheImpactstarting.There'snostandardautoignition.Yousimplyturnthekeyandpushabuttontoturnontheelectric

ity..AstheImpactaccelerates,therearenopumpingpistons,justasurgeofelectricpower.It'sasleek,aerodynamic,two-seatsportscar.It'sbothsmoothandquiet.Allyo

uheariswindwhistlingpastandthesoundoftiresonthepavement.(description)PartIIITextAnalysis◼"We'redoingabout46milesanhour.

We'reupto60nowandgoingto65.Nowwe'llslowdownalittlebit.She'selectronicallylimitedat75.“◼ButasexcitingandappealingastheImpactseem

s,therearestillmajortechnologicalhurdlesengineersneedtoclearbeforesuchacarbecomesavailabletothegeneralpublic

.Themainproblemiswiththebatteries.Theyareheavy,andthedistanceavehiclecantravelbetweenovernightchargingislimited.PartIIITextAnaly

sis◼"Thebiggestlimitationofthebatterythatwehavenowistheamountofenergythatitcanstore.Thebatteryweighs870pounds.Itcanonlystoretheenergyeq

uivalentofaboutone-and-a-halfgallonsofgasoline."◼InadditiontotheU.S.-basedcarcompanies,automakersaroundtheworldareworkingonelectric-vehicleresea

rch.Allaresearchingforthetechnologywhichwillleadtoabetterelectric-carbattery.Keytotheexercise◼A1◼Size,shape,color/gasoline,dieselfuel/airpollution/e

lectriccar◼Standardautoignition/electricpower/two-seat/sports/75mph◼870/1.5/traveldistance◼A2◼Autoindustry/saggingbottomline◼Betterq

uality/majorchanges◼Electricity◼Somedistance◼Aroundtheworld/electric-vehicleresearch◼Abetterelectriccarbattery