Unit+2+Topic+3+Section+C 仁愛版九年級英語上冊

Unit2

SavingtheEarthTopic3SectionC學習目標預習檢測知識梳理課堂總結學習導航重點探究當堂檢測新課導入Use

but,and,while

toanswerthefollowingquestions.Whatactivitiesshouldwedotoprotecttheenvironment?Whatactivitiesshouldn’twedotoprotecttheenvironment?能熟悉并正確運用本課時的重點單詞和短語12能通過閱讀文章，了解現(xiàn)代科學技術在環(huán)境保護方面的作用1.______theproblem,wearelookingfornewwaystoproducepower.A.SolveB.SolvingC.TosolveD.Solves2.Inthenearfuture,manyrobots________tohelpusdohousework.A.willbeusedB.willuseC.areusedD.willbeuse預習檢測CA3.Thetraincan______aspeedof300kmperhour.A.arrive B.drive C.develop D.reach4.Notonlytheparents,butalsothechild____tohaveatrip.A.decide B.decides C.deciding D.todecide5.Thepriceofhousesareincreasing_______.A.rapid B.rapidly C.difficult D.quickDBB知識梳理Keypoints1.Somecountriesusenuclearenergytoproducepower.

usesth.todosth./

usesth.fordoing.使用某物來做某事

eg:

Peopleusedbambootowritewithinthepast.

在過去人們使用竹子寫字。

Peopleusewindforproducingelectricity.

人們用風發(fā)電。Keypoints2.Itskeydisadvantageisthattheprocessrequiresalongtime(upto30days)andthecostishigh.它最大的缺陷是生產(chǎn)過程需要很長時間（長達30天）和成本高。processn.步驟，過程v.加工，處理requirev.需要，需求require有兩種用法：

*require(doing)sth.表示主語“該……了”。

eg:Thefloorrequireswashing.地板該洗了。

*berequiredtodosth.表示主語必須（被要求）……eg:Studentsarerequiredtoattendclasses.

學生必須按規(guī)定上課。Keypoints3.It’stoosmalltoholdmanypeople,butthelargermodelswillbedevelopedinthenearfuture.它太小，不能承載太多的人，但在不久的將來，更大的車型將會被研制出來。①holdv.容納，包含；eg:Theplaneholdsabout300passengers.這架飛機可容納大約300名乘客。②holdv.拿著，抓住，抱住；eg:Hewasholdingthebabyinhisarms.他抱著嬰兒。③holdv.召開，舉行，進行（比賽，會議等）；eg:TheOlympicGamesareheldeveryfouryears.奧運會每四年舉行一次。④holdv.(打電話時）等待，不掛斷；eg:Holdon,please!請稍等。Keypoints4.Thetraincanreachatopspeedof431kmperhour.

這輛火車最高速度能達到431公里每小時。

reachaspeedof+具體速度

——達到某個速度拓展：ataspeedof+具體速度——以某個速度,可用high,low,full等形容詞修飾speed。eg:Beijing-Tianjintrainreachesaspeedof300kmperhour.

北京至天津線火車時速達到每小時300千米。Keyphrases1.尋找新方法2.在20世紀90年代3.首批國家之一4.全世界的人5.在人們的日常生活中6.在不久的將來7.達到最高時速8.更貴得多9.用……來做10.被用作lookfornewwaysinthe1990soneofthefirstcountriespeopleallovertheworldinpeople’severyday/dailylivesinthenearfuturereachatopspeedmuchmoreexpensiveuse…todobeusedfordoing/todosth.現(xiàn)代科學技術在環(huán)境保護方面的運用構建全球能源互聯(lián)網(wǎng)……Doyouknowthem?It’sanelectriccar.Itworkswell,butit’sslowandcan’trunforlong.It’samaglevtrain.Itsadvantagesarequiet,fastandclean,butit’stooexpensive.磁懸浮列車n.技術Chinaisoneofthefirstcountriesintheworldtousebiogas

technology

.

沼氣ReadingWatchthevideoabout1a.Inmanycountries,peopleproducepowerfromcoal,butitisverydirtyandcausesacidrain.Somecountriesusenuclearenergy

toproducepower.However,nuclearpowercanbeverydangerous.Tosolvetheenergyproblem,peopleallovertheworldarelookingfornewwaystoproducepower.Paragraph1ReadParagraph1again,andthenmarkTrue(T)orFalse(F).()It’sgoodthatpeopleproducepowerfromcoal.()Nuclearpowerisdangerous.Sowecan’tuseit.()Tosolvetheenergyproblem,peopleallovertheworldarelookingfornewwaystoproducepower.TFTChinaisoneofthefirstcountriesintheworldtousebiogastechnology.Farmersrecyclestraw,grassandanimalwastetomakebiogas.This

renewableenergyisusedinpeople’severyday

lives.Itskeydisadvantageisthattheprocessrequiresalongtime(upto30days)andthecostishigh.Paragraph2Whatdofarmersusetomakebiogas?2.Itisthebiogasperfect?Why?Theyrecyclestraw,grass,andanimalwastetomakebiogas.No,itisn’t.Becauseitskeydisadvantageisthattheprocessrequiresalongtime(upto30days)andthecostishigh.Answerthefollowingquestions.Electricvehicleswere__________inthe1990s.OnApril11,2010,anewkindofelectricvehicle_______“Yezi”wasshowninthe2010ShanghaiWorldExpo.Itproduces_________fromthesun,thewindandCO2.Itcannotonlyprotecttheenvironmentbutalso_____energy.It’stoosmalltoholdmanypeople,but_______modelswillbedevelopedinthenearfuture.develop,electric,name,save,largedevelopednamedelectricitysavelargerParagraph3InChina,thebest-knownmaglevtrainistheGerman-builtoneinShanghai.Ittakespeoplejust7minutestogototheairport30kmaway.Thetraincanreachatopspeedof431kmperhour.Itisquietandquick.Thereisnowheelnoise,becausetherearenowheels.Maglevtrainsareveryenergy-efficientanddonotpollutetheair.However,maglevguidepathsaremuchmoreexpensivethantraditionalsteelrailways.Paragraph41.去30公里以外的飛機場只需花費人們七分鐘的時間。Ittakespeoplejust7minutestogototheairport30kmaway.

2.火車最高時速能夠達到每小時431公里。Thetraincanreachatopspeedof431kmperhour.

Translatethesentences.1bRead1aandmatchthewordswiththepicturesonPage48.A.acidrainB.nuclearenergyC.biogasACB()()()1cRead1aagainandcompletethetable.ItemAdvantageDisadvantagebiogas

electricvehicle

maglevtrain

renewablelongprocessandhighcostforitsbuildingsaveenergy,nopollutiontoosmalltoholdmanypeople

quiet,quick,energy-efficient,nopollution

muchmoreexpensivethantraditionalsteelrailwaysRetellcoaldirty,acidnuclearenergydangerouselectricvehiclesthesun,thewindandCO2protecttheenvironment,saveenergy,smallmaglevtrainGerman-built,quiet,quick,nowheelnoise,energy-efficient,notpollutetheairbiogastechnology–straw,grassandanimalwaste,everydaylives,require,thehighcost2aReadthepassagebelowandmatchthepictureswiththesentences.Thendiscussindetailtheuseofoneenergysource.

Thesun,wind,wavesandheatfromdeepintheearthareenergysources.Theywillneverrunoutsotheyarecalledrenewablesources.In2011,about16%ofenergyusedworldwidecamefromrenewablesources.Theuseofitisincreasingrapidlyeachyear.

Windcanproduceelectricityinmanyplaces.Peopleusesunlighttoproduceelectricity.Seawavesareusedforproducingelectricity.Peopleusehotwaterorsteamfromdeepintheearthtoproduceelectricityandheatforfactories,schoolsandhomes.（）（）（）（）24132bTakenotesonyourdiscussionandwriteapassagewiththem.

Sunlightcanproducealotofenergy.Peoplebegantousetheenergyfromthesunlightindifferentwaysmanyyearsago.Wecanuseittowarmthehouseinthewinter,toheatthewaterforbaths,andtoproduceelectricity.What’smore,wecanevenuseittorunvehiclesdirectlyinthenearfuture.Asisknowntous,theenergy