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Unit12TransportationIIPartIIIThenewtrendsofautomobilesClassPlan◼WarmingupNewsBroadcast:practicetheabilityofcatchingkeypoi

ntsinthenew◼Discussion:thetrendsofthedevelopmentoftransportation◼TextanalysisWordsandExpressions◼Keywordselectriccarzerotailpipeemi

ssions零排放battery◼Vocabulary◼Combustion:theprocessofburning◼Ignition:theraisingofasubstancetoitsignitionpoint,asbyelec

triccurrent,friction,ormechanicalshock◼Piston:活塞◼Surge:toincreasesuddenly,usedofelectriccurrentorvoltage◼Hurdle:toovercomeor

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

orescueitssaggingbottomline.Betterdesignandbetterqualityarecontributingtothebeginningofaturnaround,butlong-term

successisgoingtomeanmajorchangesfortheentireindustry.Ensuringthatsuccessinvolvesplanningforanentirelynewtypeofautomobile,onepoweredbyele

ctricity.Theelectriccarisstillsomedistancedowntheroad.(topicpresenting)PartIIITextAnalysis◼It'srushhourinDetroit,andth

einterstatefreeway,1-94,isjammedwithcarsheadingforhomeafteranotherworkdayinthecity.Lookingdownonthefreewayfromanoverpass,oneseescarsandtrucksofeverys

ize,shape,andcolor.(description)◼Butforalloftheirdifferences,thesevehiclesdohavesomethingincommon:they'

reallpoweredbyaninternalcombustionenginerunningongasolineordieselfuel.PartIIITextAnalysis◼Butasautomobile-relatedpollutiongrows

worseinmajorurbanareas,governmentalofficialsandenvironmentalistsarepushingautomobilemanufacturerstodesignvehiclespoweredbyelectricity.◼Yousee,elec

triccarshaveabsolutelyzerotailpipeemissions.InDetroit,thebigthreeU.S.carcompanieshavespentmillionsresearchingelectricvehicle

s.Chryslerhasanelectricversionofitspopularminivan;andFord,asmallelectricwagon;butnonehasattractedasmuchattentionasGeneralMotors'

experimentalelectriccarcalledtheImpact.(theintroductiontoImpact)PartIIITextAnalysis◼That'sthesoundoftheImpactstarting.There'snostandardautoi

gnition.Yousimplyturnthekeyandpushabuttontoturnontheelectricity..AstheImpactaccelerates,therearenopumpingpistons,justasurgeo

felectricpower.It'sasleek,aerodynamic,two-seatsportscar.It'sbothsmoothandquiet.Allyouheariswindwhistlingpastandthesoundoftiresonthepavement.

(description)PartIIITextAnalysis◼"We'redoingabout46milesanhour.We'reupto60nowandgoingto65.Nowwe'llslowdownalittlebit.She'sel

ectronicallylimitedat75.“◼ButasexcitingandappealingastheImpactseems,therearestillmajortechnologicalhurdlesengineersneedto

clearbeforesuchacarbecomesavailabletothegeneralpublic.Themainproblemiswiththebatteries.Theyareheavy,andthedistanceavehiclecantravelbetweenovernightch

argingislimited.PartIIITextAnalysis◼"Thebiggestlimitationofthebatterythatwehavenowistheamountofenergythatitcanstore.Thebatter

yweighs870pounds.Itcanonlystoretheenergyequivalentofaboutone-and-a-halfgallonsofgasoline."◼InadditiontotheU.S.-basedcarcompanies,automakersaroundth

eworldareworkingonelectric-vehicleresearch.Allaresearchingforthetechnologywhichwillleadtoabetterelectric-carbattery.Keytotheexercise◼A1◼Size,sh

ape,color/gasoline,dieselfuel/airpollution/electriccar◼Standardautoignition/electricpower/two-seat/sports/75mph◼870/1.5/

traveldistance◼A2◼Autoindustry/saggingbottomline◼Betterquality/majorchanges◼Electricity◼Somedistance◼Aroundtheworld/electric-vehic

leresearch◼Abetterelectriccarbattery