Unit3 正文學(xué)案-高中英語人教版（2019）選擇性必修第三冊

高二英語XB3Unit3正文學(xué)案Geniusistheabilitytoendlessworkhard.天才就是無止境刻苦勤奮的能力。編輯：使用日期：·編輯：使用日期：高二XB3Unit3高二XB3Unit3正文學(xué)案校對：審核：審核：學(xué)習(xí)目標(biāo)。1.Toenhancethereadingandwritingskills; 2.Tofigureoutthestructureandthelanguagefeaturesofthetext.;二、讀文章,梳理知識(shí)點(diǎn)。CLIMATECHANGEREQUIRESTHEWORLD'SATTENTION氣候變化需要全世界的關(guān)注Wehaveknownaboutclimatechangefordecades.（1）ThereislittledoubtthatEarthisgettingwarmerandwarmer(seethegraph).Awarmingoceanandatmospherealongwithmeltingiceandrisingsealevelsprovideevidenceofadramaticchangeintheglobalclimate.我們了解氣候變化已有幾十年了。毫無疑問，地球正變得越來越暖海洋和大氣變暖，冰川融化，海平面上升提供全球氣候急劇變化的證據(jù)。本句是復(fù)合句，that引導(dǎo)同位語從句In2013,alotofpeoplewereshockedbyanewsphotoofadeadpolarbear（2）thatwasfoundonNorway'sArcticislandofSvalbard.Accordingtothescientistswhofounditsdeadbody,allthatremainedofthepolarbearwas“skinandbones”.Anexpertwhohasstudiedpolarbearsformanyyearssaidthatfromthepositionofitsdeadbody,thebearappearedtohavestarvedanddied.Expertsclaimedthatlowsea-icelevels（3）causedbyclimatechangemeantthebearcouldnothuntsealsasbefore,soithadtotravelgreaterdistancesinordertofindfood.ThisalarmingcaseshowedhowtheincreaseintemperaturehadanimpactonEarthsecology.2013年，很多人都被挪威北極斯瓦爾巴特島發(fā)現(xiàn)的一只北極熊尸體的新聞?wù)掌痼@了。據(jù)發(fā)現(xiàn)它尸體的科學(xué)家說，北極熊只剩下“皮包骨頭”。一位研究北極熊多年的專家說，從它的尸體位置來看，這只熊似乎是餓死了。專家稱，氣候變化導(dǎo)致的海冰水平降低意味著北極熊不能像以前那樣捕食海豹，因此它必須跋涉更遠(yuǎn)的距離來尋找食物。這個(gè)令人震驚的例子顯示了溫度的上升對地球生態(tài)的影響。定語從句過去分詞作定語Thenwhatiscausingtheincreaseintheglobalaveragesurfacetemperature?Climatescientistsoftenmentionakeyclimateprocess（4）calledthe“qreenhouseeffect,（5）whichhastwocommonmeanings:the“natural”greenhouseeffectandthe“manmade”greenhouseeffect.The“natural”greenhouseeffectreferstothefactt（6）hatheatfromthesunenterstheatmosphereandwarmsEarth’ssurfaceasshort-waveradiation.Theheatisreleasedbackintospaceatlongerwavelengths.Greenhousegasesintheatmospheresuchasmethaneandcarbondioxidetrapsomeoftheheat,（7）keepingEarth’sclimatewarmandhabitable.Withoutthisprocess,Earthcouldnotsustainlife.However,the“man-made”greenhouseeffecthasnowbecomeabigproblem.Whenpeopleproducehugeamountsofextragreenhousegasesbyburningfossilfuels,moreheatenergyistrappedintheatmosphereandcausesEarth'ssurfacetemperaturetorisequickly.那么是什么導(dǎo)致了全球平均地表溫度的上升呢?氣候科學(xué)家經(jīng)常提到一個(gè)叫做“溫室效應(yīng)”的關(guān)鍵氣候過程，它有兩個(gè)共同的含義:“自然”溫室效應(yīng)和“人為”溫室效應(yīng)?！白匀弧睖厥倚?yīng)指的是太陽的熱量進(jìn)入大氣層，以短波輻射的形式使地球表面變暖。熱量以更長的波長釋放回太空。大氣中的溫室氣體，如甲烷和二氧化碳，捕獲了一些熱量，使地球氣候溫暖宜居。沒有這一過程，地球就無法維持生命。然而，“人為的”溫室效應(yīng)現(xiàn)在已經(jīng)成為一個(gè)大問題。當(dāng)人們通過燃燒化石燃料產(chǎn)生大量額外的溫室氣體時(shí)，更多的熱能被困在大氣中，導(dǎo)致地球表面溫度迅速上升。過去分詞做定語非限制性定語從句，且是復(fù)合句引導(dǎo)同位語從句現(xiàn)在分詞做結(jié)果狀語，warmandhabitable形容詞做賓補(bǔ)（8）Thereisstrongandcomprehensiveevidencethattheriseintemperaturehasledtoanincreaseinextremeweatherandnaturaldisastersworldwidenotonlycausingseriousdamage,butalsocostinghumanlives.Climatescientistshavewarnedthatifwedonottakeappropriateactions,thiswarmingtrendwillprobablycontinueandtherewillbeahigherpricetopay.Infactnewsreportsarefrequentlybroadcastaboutextremerainstormsandheatwaves（9）causingdeathsandeconomiclosses.有力和全面的證據(jù)表明，氣溫上升已導(dǎo)致全球極端天氣和自然災(zāi)害的增加，不僅造成嚴(yán)重的破壞，而且奪去了人的生命。氣候科學(xué)家警告說，如果我們不采取適當(dāng)?shù)男袆?dòng)，這種變暖趨勢可能會(huì)繼續(xù)下去，并將付出更高的代價(jià)。事實(shí)上，關(guān)于極端暴雨和熱浪造成死亡和經(jīng)濟(jì)損失的新聞報(bào)道經(jīng)常被廣播。整句是復(fù)合句，Thereisstrongandcomprehensiveevidence是主句，that引導(dǎo)同位語從句，notonlycausingseriousdamage,butalsocostinghumanlives是現(xiàn)在分詞作結(jié)果狀語后置定語Continuedgreenhousegasemissionswillresultinfurtherwarmingandlong-lastingchangestotheglobalclimate.Thisrequirestheattentionofpeopleallovertheworld.Governmentsneed（10）toconsidermakingpoliciesandtakingappropriateactionsandmeasures（11）toreducegreenhousegasemissions.Weasindividualscanalsoreduceour“carbonfootprint”byrestrictingtheamountofcarbondioxideourlifestylesproduce.Itisourresponsibilitytoseizeeveryopportunitytoeducateeveryoneaboutglobalwarming,alongwithitscausesandimpacts,becausethisisthemostseriousissueaffectingallofusont