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Unit2SavingtheEarthTopic3Whatcanwedoathometoprotecttheenvironment?SectionCAreyouagreenerperson?Howcanwebecomeagreenerperson?•Turnofftheligh

tswhenweleavearoom.•Walkorrideabikeinsteadoftakingabusorataxi.•Takeaclothbagwhenwegoshopping.•Don’tdriveacarifyoutravelashortdistance.•

Writeonbothsidesofthepaper.•Don’tusethethingsthatcanbeusedonlyonce.•Afterwewashfaces,wecanusethewatertowashclothes.•TurnofftheTVsetwhileweare

away.•…It’sanelectriccar.Itworkswell,butit’sslowandcan’trunforlong.electric(adj.)—electricity(n.)Doyo

uknowthem?Doyouknowit?It’samaglevtrain.Itsadvantagesarequiet,fastandclean,butit’stooexpensive.磁悬浮列车n.技术Doyouknowit?Chinaisoneofthefirstcountries

intheworldtousebiogastechnology.沼气1aReadandunderstand.Lookatthepictures.Doyouknowwhattheyare?Choosetherightpictureforeachparagraph.paragraph2para

graph3Paragraph41bRead1aandmatchthewordswiththepicturesonPage48.A.acidrainB.nuclearenergyC.biogasACBadj

.原子核的，原子能的酸雨ReadParagraph1again,andthenmarkTrue(T)orFalse(F).•()It’sgoodthatpeopleproducepowerfromcoal.•()

Nuclearpowerisdangerous.Sowecan’tuseit.•()Tosolvetheenergyproblem,peopleallovertheworldarelookingfornewwaystoproducepowe

r.TFTItskeydisadvantageisthattheprocessrequiresalongtime(upto30days)andthecostishigh.它最大的缺陷是生产过程需要很长时间（长达30天）和成本高。proc

essn.步骤，过程v.加工，处理requirev.需要，需求require有两种用法：*require(doing)sth.表示主语“该...了”。如：Thefloorrequireswashing.地板

该洗了。*berequiredtodosth.表示主语必须（被要求）...如:Studentsarerequiredtoattendclasses.学生必须按规定上课。Electricvehicleswere__________inthe1990s.OnApril11,2010,an

ewkindofelectricvehicle_______“Yezi”wasshowninthe2010ShanghaiWorldExpo.Itproduces_________fromthesun,thewindandCO2.Itcannotonly

protecttheenvironmentbutalso_____energy.It’stoosmalltoholdmanypeople,but_______modelswillbedevelopedi

nthenearfuture.develop,electric,name,save,largedevelopednamedelectricitysavelarger1.去30公里以外的飞机场只需花费人们七分钟的时间。Ittakespeoplejust7minutestogotothe

airport30kmaway.2.火车最高时速能够达到每小时431公里。Thetraincanreachatopspeedof431kmperhour.1cRead1aagainandcompletethetable.ItemAdv

antageDisadvantagebiogaselectricvehiclemaglevtrainrenewablelongprocessandhighcostforitsbuildingsaveenergy,nopollutiontoosmalltoholdmanypeopl

equiet,quick,energy-efficient,nopollutionmuchmoreexpensivethantraditionalsteelrailways•coal---dirty,acid•nuclearen

ergy---dangerous•electricvehicles---thesun,thewindandCO2---protecttheenvironment,saveenergy,small•maglevtrain

---German-built,quiet,quick,nowheelnoise,energy-efficient,notpollutetheair•biogastechnology–straw,grassandanimalwaste,everydaylive

s,require,thehighcostRetell1a•Germann.德国人，德语Germanyn.德国pl.Germanswheeln.轮，车轮，轮子E.g.TheyareGermans,andtheyarefromGerman2aReadthepassagebelowandmat

chthepictureswiththesentences.Thendiscussindetailtheuseofoneenergysource.Thesun,wind,wavesandheatfromdeepintheearthareenergysources.The

ywillneverrunoutsotheyarecalledrenewablesources.In2011,about16%ofenergyusedworldwidecamefromrenewablesources.Theuseofitisincreasingrapidlyeachyea

r.deepadj.深的，厚的adv.深深地，在深处runout用完，耗尽E.g.Hehasrunoutoffood,sohischildrenarehungry.2aReadthepassagebelowandmatchthepi

ctureswiththesentences.Thendiscussindetailtheuseofoneenergysource.1.Windcanproduceelectricityinmanyplaces.2.Peopleusesunlighttoproduceelec

tricity.3.Seawavesareusedforproducingelectricity.4.Peopleusehotwaterorsteamfromdeepintheearthtoprodu

ceelectricityandheatforfactories,schoolsandhomes.阳光，日光水蒸汽，蒸汽，水汽2bTakenotesonyourdiscussionandwriteapassagewiththem.Youmay

beginlikethis:Sunlightcanproducealotofenergy.Peoplebegantousetheenergyfromthesunlightindifferentwaysmanyyearsago…•Sunlightcanproducea

lotofenergy.Peoplebegantousetheenergyfromthesunlightindifferentwaysmanyyearsago.Wecanuseittowarmthehouseinthewinter,to

heatthewaterforbaths,andtoproduceelectricity.What’smore,wecanevenuseittorunvehiclesdirectlyinthenearfuture.•Asisknownto

us,theenergyfromthesunlighthasalotofadvantages.Forexample,itisclean,renewableandnon-polluting.Besides,i

tdoesnoharmtoournature.Sowe’dbetteruseitasmuchaspossible.Youcanwriteitlikethis:•Welearn:1.Somewords:technolo

gy,wheel,steel,require,German,guide,deep2.Somephrases:runout3.Somesentences:(1)Inmanycountries,peopleproducepowerfromcoal,butitisve

rydirtyandcausesacidrain.(2)Theywillneverrunoutsotheyarecalledrenewablesources.•Wecan:Talkabouttheadvantagesanddis

advantagesofsomekindsofenergy.1.Read1a.2.Memorizetheusefulexpressionsandkeysentenceswhichwelearntoday.3.FinishSectionCinyourwor

kbook.4.ReviewSectionA-C.