人教版高中英语选择性必修第三册UNIT3 Period2课件

Period2

UNIT3

ENVIRONMENTALPROTECTION主题语境人与自然——自然环境保护1．Whatdoesthetextmainlytellus?A．Somepolarbearsdiedofstarvation．B．Whatthegreenhouseeffectis．C．Howthepolarbearsfindfood．D．Globalwarminghascausedsomedisastersandwemustpayattentiontoit．课时练案课文整体阅读(ReadingandThinking)√2．What'sthemainideaofthe4thparagraph?A．Theincreasingextremeweather．B．Theconsequencesofhighgreenhousegasemissions．C．Thewarmingtrendwilllastforalongtime．D．Peoplewillpayahighprice．√1．Fromthesecondparagraphwecanlearnthat________________．A．allthepolarbearshavediedofstarvationB．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；释放；发布；发行；公开

vt．发布；释放；松开；免除；公开；宣泄①(教材原句)Theheatisreleasedbackintospaceatlongerwavelengths． ________②ThenewsoftwareisplannedforreleaseinApril． ________③Thebandwillreleaseitsnewsinglenextweek． ________④Musicisagreatchannelforreleasingyouremotions． ________vt．释放n．发行vt．发布vt．宣泄2．fueln．燃料；刺激性言行

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

________②Fuelthevehicleasyouwouldatafillingstation．

__________________③Researchsuggestswarmcolorsfuelourappetites．

_________n．燃料vt．给……提供燃料vt．刺激1．(学会断句)Expertsclaimed/thatlowsea-icelevelscausedbyclimatechange/meantthebearcouldnothuntsealsasbefore,soithadtotravelgreaterdistances/inordertofindfood．[分析]本句是so连接的__________。Expertsclaimed是____；that引导宾语从句，作claimed的宾语；该宾语从句中的thebearcouldnothuntsealsasbefore也是宾语从句，作meant的宾语；causedbyclimatechange是过去分词短语作____，修饰名词levels。[翻译]________________________________________________________________________________________________________________并列复合句主句定语专家称，由于气候变化造成的海冰水位较低，这意味着这只熊无法像以前那样捕猎海豹，所以为了找到食物它不得不长途跋涉。2．(学会断句)Thereisstrongandcomprehensiveevidence/thattheriseintemperaturehasledtoanincrease/inextremeweatherandnaturaldisastersworldwide，notonlycausingseriousdamage,butalsocostinghumanlives．[分析]本句是一个复合句。Thereisstrongandcomprehensiveevidence是_____；that引导_______从句；notonly...butalso...连接两个并列的动词-ing形式短语作结果状语。[翻译]_______________________________________________________________________________________________________________________主句同位语有充分和全面的证据表明，气温上升已导致世界范围内极端天气和自然灾害的增加，这不仅造成严重的破坏，而且还造成人员伤亡。3．(学会断句)Itisourresponsibility/toseizeeveryopportunity/toeducateeveryoneaboutglobalwarming,alongwithitscausesandimpacts,becausethisisthemostseriousissue/affectingallofusonthisplanet．[分析]本句是一个复合句。because引导_________从句；it是_________，真正的主语是toseizeeveryopportunity...；affectingallofusonthisplanet是动词-ing形式短语作_____，修饰名词issue。[翻译]_______________________________________________________________________________________________________________________原因状语形式主语定语我们有责任抓住每一个机会教育每个人，使他们了解全球变暖及其原因和影响，因为这是影响我们地球上所有人的最严重的问题。1．(续写佳句)In2013，alotofpeoplewereshockedbyanewsphotoofadeadpolarbearthatwasfoundonNorway'sArcticislandofSvalbard．2013年，挪威斯瓦尔巴群岛上发现了一只北极熊尸体，这张照片让很多人感到震惊。2．(续写佳句)Weasindividualscanalsoreduceour“carbonfootprint”

byrestrictingtheamountofcarbondioxideourlifestylesproduce．作为个人，我们也可以通过限制生活方式产生的二氧化碳量来减少我们的“碳足迹”。Continuedgreenhousegasemissionswillresultinfurtherwarmingandlong-lastingchangestotheglobalclimate．Thisrequirestheattentionofpeopleallovertheworld．Governmentsneedtoconsidermakingpoliciesandtakingappropriateactionsandmeasurestoreducegreenhousegasemissions．Weasindividualscanalsoreduceour“carbonfootprint”byrestrictingtheamountofcarbondioxideo