Unit2SavingtheEarthTopic3SectionC 學(xué)習(xí)導(dǎo)航新知學(xué)習(xí)課堂小結(jié)當(dāng)堂檢測(cè)學(xué)習(xí)目標(biāo)重點(diǎn)研討新知學(xué)習(xí)課堂小結(jié)當(dāng)堂檢測(cè)學(xué)習(xí)目標(biāo)重點(diǎn)研討學(xué)習(xí)目標(biāo)1.

能熟悉并正確運(yùn)用本課時(shí)的重點(diǎn)單詞和短語2.

能通過閱讀文章，了解現(xiàn)代科學(xué)技術(shù)在環(huán)境保護(hù)方面的作用新知學(xué)習(xí)課堂小結(jié)當(dāng)堂檢測(cè)學(xué)習(xí)目標(biāo)重點(diǎn)研討dis(no)+advantage=disadvantage(n)It’sanelectriccar.Itworkswell,butitsdisadvantageisthatit’slowandcan’trunforlong.Lookatthefollowingpicturesandguessthemeaningoftheunderlinedword.缺點(diǎn)新知學(xué)習(xí)課堂小結(jié)當(dāng)堂檢測(cè)學(xué)習(xí)目標(biāo)重點(diǎn)研討It’samaglevtrain.Ithasnowheelsbutitrunsveryfast.Itcanrunmorethanfourhundredkmperhour.磁懸浮列車新知學(xué)習(xí)課堂小結(jié)當(dāng)堂檢測(cè)學(xué)習(xí)目標(biāo)重點(diǎn)研討n.技術(shù)Chinaisoneofthefirstcountriesintheworldtousebiogas

technology.沼氣It’sanelectriccar.Itworkswell,butit’sslowandcan’trunforlong.electric(adj.)—electricity(n.)

新知學(xué)習(xí)課堂小結(jié)當(dāng)堂檢測(cè)學(xué)習(xí)目標(biāo)重點(diǎn)研討電動(dòng)的新知學(xué)習(xí)課堂小結(jié)當(dāng)堂檢測(cè)學(xué)習(xí)目標(biāo)重點(diǎn)研討1aReadandunderstand.

Inmanycountries,peopleproducepowerfromcoal,butitisverydirtyandcausesacidrain.Somecountriesusenuclearenergytoproducepower.However,nuclearpowercanbeverydangerous.Tosolvetheenergyproblem,peopleallovertheworldarelookingfornewwaystoproducepower.Chinaisoneofthefirstcountriesintheworldtousebiogastechnology.Farmersrecyclestraw,grassandanimalwastetomakebiogas.Thisrenewableenergyisusedinpeople’severydaylives.Itskeydisadvantageisthattheprocessrequiresalongtime(upto30days)andthecostishigh.新知學(xué)習(xí)課堂小結(jié)當(dāng)堂檢測(cè)學(xué)習(xí)目標(biāo)重點(diǎn)研討Electricvehiclesweredevelopedinthe1990s.OnApril11,2010,anewkindofelectricvehiclenamed“Yezi”wasshowninthe2010ShanghaiWorldExpo.Itproduceselectricityfromthesun,thewindandCO2.Itcannotonlyprotecttheenvironmentbutalsosave

energy.It’stoosmalltoholdmanypeople,butlargermodelswillbedevelopedinthenearfuture.InChina,thebest-knownmaglevtrainistheGerman-builtoneinShanghai.Ittakespeoplejust7minutestogototheairport30kmaway.Thetraincanreachatopspeedof431kmperhour.Itisquietandquick.Thereisnowheelnoise,becausetherearenowheels.Maglevtrainsareveryenergy-efficientanddonotpollutetheair.However,maglevguidepathsaremuchmoreexpensivethantraditionalsteelrailways.新知學(xué)習(xí)課堂小結(jié)當(dāng)堂檢測(cè)學(xué)習(xí)目標(biāo)重點(diǎn)研討Lookatthepictures.Doyouknowwhattheyare?Choosetherightpictureforeachparagraph.paragraph2

paragraph3Paragraph4新知學(xué)習(xí)課堂小結(jié)當(dāng)堂檢測(cè)學(xué)習(xí)目標(biāo)重點(diǎn)研討1bRead1aandmatchthewordswiththepicturesonPage48.A.acidrainB.nuclearenergyC.biogasACB()()()新知學(xué)習(xí)課堂小結(jié)當(dāng)堂檢測(cè)學(xué)習(xí)目標(biāo)重點(diǎn)研討1cRead1aagainandcompletethetable.ItemAdvantageDisadvantagebiogas

electricvehicle

maglevtrain

renewablelongprocessandhighcostforitsbuildingsaveenergy,nopollutiontoosmalltoholdmanypeople

quiet,quick,energy-efficient,nopollution

muchmoreexpensivethantraditionalsteelrailways新知學(xué)習(xí)課堂小結(jié)當(dāng)堂檢測(cè)學(xué)習(xí)目標(biāo)重點(diǎn)研討2aReadthepassagebelowandmatchthepictureswiththesentences.Thendiscussindetailtheuseofoneenergysource.

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

新知學(xué)習(xí)課堂小結(jié)當(dāng)堂檢測(cè)學(xué)習(xí)目標(biāo)重點(diǎn)研討Windcanproduceelectricityinmanyplaces.Peopleusesunlighttoproduceelectricity.Seawavesareusedforproducingelectricity.Peopleusehotwaterorsteamfromdeepintheearthtoproduceelectricityandheatforfactories,schoolsandhomes.新知學(xué)習(xí)課堂小結(jié)當(dāng)堂檢測(cè)學(xué)習(xí)目標(biāo)重點(diǎn)研討2bTakenotesonyourdiscussionandwriteapassagewiththem.

Youmaybeginlikethis:Sunlightcanproducealotofenergy.Peoplebegantousetheenergyfromthesunlightindifferentwaysmanyyearsago…新知學(xué)習(xí)課堂小結(jié)當(dāng)堂檢測(cè)學(xué)習(xí)目標(biāo)重點(diǎn)研討Sunlightcanproducealotofenergy.Peoplebegantousetheenergyfromthesunlightindifferentwaysmanyyearsago.Wecanuseittowarmthehouseinthewinter,toheatthewaterforbaths,andtoproduceelectricity.What’smore,wecanevenuseittorunvehiclesdirectlyinthenearfuture.Asisknowntous,theenergyfromthesunlighthasalotofadvantages.Forexample,itisclean,renewableandnon-polluting.Besides,itdoesnoharmtoournature.Sowe’dbetteruseitasmuchaspossible.Youcanwriteitlikethis:新知學(xué)習(xí)課堂小結(jié)當(dāng)堂檢測(cè)學(xué)習(xí)目標(biāo)重點(diǎn)研討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(fēng)發(fā)電。新知學(xué)習(xí)課堂小結(jié)當(dāng)堂檢測(cè)學(xué)習(xí)目標(biāo)重點(diǎn)研討2.Itskeydisadvantageisthattheprocessrequiresalongtime(upto30days)andthecostishigh.它最大的缺陷是生產(chǎn)過程需要很長時(shí)間（長達(dá)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(xué)生必須按規(guī)定上課。新知學(xué)習(xí)課堂小結(jié)當(dāng)堂檢測(cè)學(xué)習(xí)目標(biāo)重點(diǎn)研討3.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(huì)被研制出來。①holdv.容納，包含；eg:Theplaneholdsabout300passengers.這架飛機(jī)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(jìn)行（比賽，會(huì)議等）；eg:TheOlympicGamesareheldeveryfouryears.奧運(yùn)會(huì)每四年舉行一次。④holdv.(打電話時(shí)）等待，不掛斷；eg:Holdon,please!請(qǐng)稍等。新知學(xué)習(xí)課堂小結(jié)當(dāng)堂檢測(cè)學(xué)習(xí)目標(biāo)重點(diǎn)研討4.Thetraincanreachatopspeedof431kmperhour.

這輛火車最高速度能達(dá)到431公里每小時(shí)。

reachaspeedof+具體速度——達(dá)到某個(gè)速度拓展：ataspeedof+具體速度——以某個(gè)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(shí)速達(dá)到每小時(shí)300千米。新知學(xué)習(xí)課堂小結(jié)當(dāng)堂檢測(cè)學(xué)習(xí)目標(biāo)重點(diǎn)研討1.用某物做某事2.被用來做某事3.過去常常做某事4.適應(yīng)于做某事5.全世界6.尋找Keyphrasesusesthtodo/fordoingsthbeusedtodo/fordoingsthusedtodosthbe/getusedtodoingsthallover/aroundtheworldlookfor7.達(dá)到……的數(shù)量8.……之一9.太……而不能10.一種……11.不但……而且12.在不久的將來13.達(dá)到……的速度