人教版高中英語選擇性必修第三冊UNIT3 Period2課件

Period2

UNIT3

ENVIRONMENTALPROTECTION主題語境人與自然——自然環(huán)境保護(hù)1．Whatdoesthetextmainlytellus?A．Somepolarbearsdiedofstarvation．B．Whatthegreenhouseeffectis．C．Howthepolarbearsfindfood．D．Globalwarminghascausedsomedisastersandwemustpayattentiontoit．課時練案課文整體閱讀(ReadingandThinking)√2．What'sthemainideaofthe4thparagraph?A．Theincreasingextremeweather．B．Theconsequencesofhighgreenhousegasemissions．C．Thewarmingtrendwilllastforalongtime．D．Peoplewillpayahighprice．√1．Fromthesecondparagraphwecanlearnthat________________．A．a(chǎn)llthepolarbearshavediedofstarvationB．theexpertknowsnothingaboutthepolarbearC．thepolarbearcouldn'tfindenoughfoodbecauseofclimatechangeD．thepolarbearlikedtravellinglongdistances√2．Whyisthe“natural”greenhouseeffectimportantandnecessary?A．Becauseitisshort-waveradiation．B．Becauseitislong-waveradiation．C．Becauseitreleasesmoreheat．D．BecauseithelpsEarthtosustainlife．3．Inwhichpartofanewspaperormagazinemaywefindthistext?A．Entertainment． B．Economy．C．Education． D．Environment．√√1．Doyouthinkclimatechangeistheresultofhumanactivity?Giveyourreasons．___________________________________________________________2．Whodoyouthinkshouldtakeresponsibilityfordealingwithclimatechange?Whatcanwedo?___________________________________________________________[答案]略warmerandwarmerdeathgreenhouseeffectdisastersattention1．releasen．排放；釋放；發(fā)布；發(fā)行；公開

vt．發(fā)布；釋放；松開；免除；公開；宣泄①(教材原句)Theheatisreleasedbackintospaceatlongerwavelengths． ________②ThenewsoftwareisplannedforreleaseinApril． ________③Thebandwillreleaseitsnewsinglenextweek． ________④Musicisagreatchannelforreleasingyouremotions． ________vt．釋放n．發(fā)行vt．發(fā)布vt．宣泄2．fueln．燃料；刺激性言行

vt．增加；給……提供燃料；加強；刺激①(教材原句)Whenpeopleproducehugeamountsofextragreenhousegasesbyburningfossilfuels，moreheatenergyistrappedintheatmosphereandcausesEarth'ssurfacetemperaturetorisequickly．

________②Fuelthevehicleasyouwouldatafillingstation．

__________________③Researchsuggestswarmcolorsfuelourappetites．

_________n．燃料vt．給……提供燃料vt．刺激1．(學(xué)會斷句)Expertsclaimed/thatlowsea-icelevelscausedbyclimatechange/meantthebearcouldnothuntsealsasbefore,soithadtotravelgreaterdistances/inordertofindfood．[分析]本句是so連接的__________。Expertsclaimed是____；that引導(dǎo)賓語從句，作claimed的賓語；該賓語從句中的thebearcouldnothuntsealsasbefore也是賓語從句，作meant的賓語；causedbyclimatechange是過去分詞短語作____，修飾名詞levels。[翻譯]________________________________________________________________________________________________________________并列復(fù)合句主句定語專家稱，由于氣候變化造成的海冰水位較低，這意味著這只熊無法像以前那樣捕獵海豹，所以為了找到食物它不得不長途跋涉。2．(學(xué)會斷句)Thereisstrongandcomprehensiveevidence/thattheriseintemperaturehasledtoanincrease/inextremeweatherandnaturaldisastersworldwide，notonlycausingseriousdamage,butalsocostinghumanlives．[分析]本句是一個復(fù)合句。Thereisstrongandcomprehensiveevidence是_____；that引導(dǎo)_______從句；notonly...butalso...連接兩個并列的動詞-ing形式短語作結(jié)果狀語。[翻譯]_______________________________________________________________________________________________________________________主句同位語有充分和全面的證據(jù)表明，氣溫上升已導(dǎo)致世界范圍內(nèi)極端天氣和自然災(zāi)害的增加，這不僅造成嚴(yán)重的破壞，而且還造成人員傷亡。3．(學(xué)會斷句)Itisourresponsibility/toseizeeveryopportunity/toeducateeveryoneaboutglobalwarming,alongwithitscausesandimpacts,becausethisisthemostseriousissue/affectingallofusonthisplanet．[分析]本句是一個復(fù)合句。because引導(dǎo)_________從句；it是_________，真正的主語是toseizeeveryopportunity...；affectingallofusonthisplanet是動詞-ing形式短語作_____，修飾名詞issue。[翻譯]_______________________________________________________________________________________________________________________原因狀語形式主語定語我們有責(zé)任抓住每一個機會教育每個人，使他們了解全球變暖及其原因和影響，因為這是影響我們地球上所有人的最嚴(yán)重的問題。1．(續(xù)寫佳句)In2013，alotofpeoplewereshockedbyanewsphotoofadeadpolarbearthatwasfoundonNorway'sArcticislandofSvalbard．2013年，挪威斯瓦爾巴群島上發(fā)現(xiàn)了一只北極熊尸體，這張照片讓很多人感到震驚。2．(續(xù)寫佳句)Weasindividualscanalsoreduceour“carbonfootprint”

byrestrictingtheamountofcarbondioxideourlifestylesproduce．作為個人，我們也可以通過限制生活方式產(chǎn)生的二氧化碳量來減少我們的“碳足跡”。Continuedgreenhousegasemissionswillresultinfurtherwarmingandlong-lastingchangestotheglobalclimate．Thisrequirestheattentionofpeopleallovertheworld．Governmentsneedtoconsidermakingpoliciesandtakingappropriateactionsandmeasurestoreducegreenhousegasemissions．Weasindividualscanalsoreduceour“carbonfootprint”byrestrictingtheamountofcarbondioxideo