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Unit12TransportationIIPartIIIThenewtrendsofautomobilesClassPlan◼WarmingupNewsBroadcast:practicetheabilityofcatc

hingkeypointsinthenew◼Discussion:thetrendsofthedevelopmentoftransportation◼TextanalysisWordsandExpressions◼Keywordselectriccarzerotailpipeemissions零排

放battery◼Vocabulary◼Combustion:theprocessofburning◼Ignition:theraisingofasubstancetoitsignitionpoint,as

byelectriccurrent,friction,ormechanicalshock◼Piston:活塞◼Surge:toincreasesuddenly,usedofelectriccurrentorvoltage

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

toindustryhasbeenlookingforwaystorescueitssaggingbottomline.Betterdesignandbetterqualityarecontributingtothebeginningofaturnaround

,butlong-termsuccessisgoingtomeanmajorchangesfortheentireindustry.Ensuringthatsuccessinvolvesplanningforanentirelynewtypeofautomobile,onepowered

byelectricity.Theelectriccarisstillsomedistancedowntheroad.(topicpresenting)PartIIITextAnalysis◼It'srushhourinDetroit,andtheinterst

atefreeway,1-94,isjammedwithcarsheadingforhomeafteranotherworkdayinthecity.Lookingdownonthefreewayfromano

verpass,oneseescarsandtrucksofeverysize,shape,andcolor.(description)◼Butforalloftheirdifferences,the

sevehiclesdohavesomethingincommon:they'reallpoweredbyaninternalcombustionenginerunningongasolineordieselfuel.PartIIITextAnalysis◼Butasau

tomobile-relatedpollutiongrowsworseinmajorurbanareas,governmentalofficialsandenvironmentalistsarepushingauto

mobilemanufacturerstodesignvehiclespoweredbyelectricity.◼Yousee,electriccarshaveabsolutelyzerotailpipeemissions.InDetroit,thebigthreeU.S.carcompa

nieshavespentmillionsresearchingelectricvehicles.Chryslerhasanelectricversionofitspopularminivan;andF

ord,asmallelectricwagon;butnonehasattractedasmuchattentionasGeneralMotors'experimentalelectriccarcalledtheImpact.(theintro

ductiontoImpact)PartIIITextAnalysis◼That'sthesoundoftheImpactstarting.There'snostandardautoignition.Yousimplyturnthekey

andpushabuttontoturnontheelectricity..AstheImpactaccelerates,therearenopumpingpistons,justasurgeofele

ctricpower.It'sasleek,aerodynamic,two-seatsportscar.It'sbothsmoothandquiet.Allyouheariswindwhistlingpastandthesoundoftiresonthepavement.(descripti

on)PartIIITextAnalysis◼"We'redoingabout46milesanhour.We'reupto60nowandgoingto65.Nowwe'llslowdownalittlebit.She'selectronicallylimi

tedat75.“◼ButasexcitingandappealingastheImpactseems,therearestillmajortechnologicalhurdlesengineersneedtoclearbeforesuchacarbecomesavailabletothe

generalpublic.Themainproblemiswiththebatteries.Theyareheavy,andthedistanceavehiclecantravelbetweenovernightchargingislim

ited.PartIIITextAnalysis◼"Thebiggestlimitationofthebatterythatwehavenowistheamountofenergythatitcanstore.Thebatteryweighs870pounds.Itcanonlystorethe

energyequivalentofaboutone-and-a-halfgallonsofgasoline."◼InadditiontotheU.S.-basedcarcompanies,automakersaroundtheworldareworki

ngonelectric-vehicleresearch.Allaresearchingforthetechnologywhichwillleadtoabetterelectric-carbattery.

Keytotheexercise◼A1◼Size,shape,color/gasoline,dieselfuel/airpollution/electriccar◼Standardautoignition/ele

ctricpower/two-seat/sports/75mph◼870/1.5/traveldistance◼A2◼Autoindustry/saggingbottomline◼Betterquality/majorchang

es◼Electricity◼Somedistance◼Aroundtheworld/electric-vehicleresearch◼Abetterelectriccarbattery