大学英语精读第二册Unit 5-2公开课一等奖省优质课大赛获奖课件

Unit5

TheVillainintheAtmosphere

Lead-in1.Whatarethefactorsofcausingglobalwarming?2.Whattheinfluenceofglobalwarming?因为全球变暖而产生气候问题—台风构想—若干年后景象全球气候变暖一些证据造成气候变暖原因水污染酸雨危害物种加速灭绝人口剧增土地遭侵蚀沙化大气环境污染森林资源锐减海洋生态环境恶化气候变暖阿尔卑斯山脉-瑞士http://qingyuan_/非极地冰川大范围缩小，雪盖面积下降，永久性冻土退化http://qingyuan_/长江源最大冰川近40年退缩4000米http://qingyuan_/应付全球变暖之终极武器—水上楼房http://qingyuan_/GlobeReading_main1.PartDivisionoftheText2.FurtherUnderstandingReadingGlobeReading.1PartDivisionoftheText

MainIdeasParts

11-728-18319-22Itintroducesanessentialgastolife—

carbondioxideanditsinfluence.ItanalyzeswhatcarbondioxidedoestothetemperatureoftheEarthandthefactorsthatcausetheconcentrationofit.Itgivesussomesuggestionstodealwiththeproblems.General

ReadingParagraphsGlobeReading.2-part2QuestionsandAnswersCarbondioxide—CO2.1.Whoisthe“villain”intheatmosphere?0.034%.2.Howmuchinquantityiscarbondioxidepresentintheatmosphere?Plantsabsorbcarbondioxideandconvertitintotheirowntissue,which,inturn,serveasthebasicfoodforallofanimallife,includinghumanbeings.3.WhatdoescarbondioxidedotoplantsandanimallifeonEarth?PartOneThesealevelisrisingveryslowlyfromyeartoyearanditwillcontinuetoriseanddosoatanevergreaterrate.Thelow-lyingareasonEarthmightbedrownedinthehundredyearstocome．GlobeReading.2-part2QuestionsandAnswersItisnecessaryforallanimallife.4.What’sthefunctionofoxygen?5.Whatishappeningtothesealevel?Whatwilltherisingsealeveldotoourlife?(para.5)PartOne1.Itisnotverypoisonousanditispresentintheatmosphereinsosmallaquantity—only0.034percent—thatitdoesusnoharm.TranslatethesentenceintoChinese它毒性不大，在大气层中含量极小——只占0.034％——不会对我们造成任何伤害。Article1_SSentencestructures2.Buthereiswhatthisapparentlyharmlessandcertainlyessentialgasisdoingtous:

(1).AnalyzethestructureofthesentenceItisaninversion.“here”isusedatthebeginningofthesentence.Thesubjectofthesentenceisacomplexsentence,consistingofasubjectclause“whatthisapparentlyharmlessandcertainlyessentialgas.”(2).TranslatethesentenceintoChinese.然而，这一看上去无害而且无疑又必不可少气体却正在对我们产生影响。3.Wheretherearelow-lyingcoastalareas(wherealargefractionoftheworld’spopulationlives)thewaterwilladvancesteadily,forcingpeopletoretreatinland.(para.5)1.Paraphrasethesentence.Thewaterwillmoveforwardtothecoastalareasthatarenotmuchabovetheland(inwhichagreatnumberofpeopleintheworldlive),asaresult,manypeoplehavetomoveawayandsettledowninsidetheircountries.2.TranslatethesentenceintoChinese.在那些低洼沿海地域(在这些地域居住着世界上很大一部分人口)，海水会稳步向前推进，迫使人们向内陆退居。

Article1_S4.Floridawilldisappearbeneaththewaves,aswillmuchoftheBritishIsles,thecrowdedNilevalley,andthelow-lyingareasofChina,India,andRussia.1.Analyzethestructureofthesentence.

“as”作为连接词引导了方式状语从句，为了保持句子平衡，使用倒装句。MoreExamples:Hetraveledagreatdealasdidmostofhisfriends.2.TranslatethesentenceintoChinese.佛罗里达将会淹没在海浪之下，英伦三岛大部分，人口稠密尼罗河流域，还有中国、印度和俄罗斯低洼地域也都将遭到一样命运。Article2_S_1

5.

Andallbecauseofcarbondioxide.

Paraphrasethesentence.Theabovementionedresultsareallcausedbycarbondioxide.PartTwo8.Lessheatislostatnight,forthatreason,thanwouldbelostifcarbondioxidewerenotpresentintheatmosphere.

Whypluralform“were”isusedhere?SubjunctivemoodMoreExamples:Jeandoesn’twanttoworkrightawaybecauseshethinksthatifsheweretogetajobsheprobablywouldn’tbeabletoseeherfriendsverysoon.6.Sunlight,strikingthetopoftheatmosphere,travelsrightthroughmilesofittowarmtheEarth’ssurface.

1.What’sthefunctionof“strikingthetopoftheatmosphere”?Apresentparticiplephraseisusedasattributivetomodify“sunlight”.2.TranslatethesentenceintoChinese.太阳光照射大气层顶部，径直透过数英里大气层，温暖着地球表面。Article2_S_1

7.However,theatmosphereisnotquiteastransparenttoinfraredradiationasitistovisiblelight.Paraphrasethesentence.Theatmosphereisclearertovisiblelightthanthattoinfraredradiation.2.TranslatethesentenceintoChinese.然而，大气层对红外线来说并不像它对可见光那样透明。Article3_S_19.Wecanbethankfulthatcarbondioxideiskeepinguscomfortablywarm,buttheconcentrationofcarbondioxideintheatmosphereisgoingupsteadilyandthatiswherethevillainycomesin.

TranslatethesentenceintoChinese.我们该感到欣慰，二氧化碳给我们温暖使我们舒舒适服，不过大气中二氧化碳浓度正在稳步升高，其恶迹也就由此而生。Article3_S_110.Eachyearsince,theconcentrationhascreptupwardanditnowstandsat0.0340percent.

(1).Paraphrasethesentence.Since1958,everyyearthegatheringofcarbondioxidehasincreasedandnowitwasabout0.0340percent.(2).TranslatethesentenceintoChinese.今后每年，其浓度逐年悄悄攀升，而现在已到达0．0340％。11.Thecarboncontainedinthesefuels,whichhasbeensafelyburiedundergroundformanymillionsofyears,isnowbeingburnedtocarbondioxideandpouredintotheatmosphereatarateofmanytonsperday.1.AnalyzethestructureofthesentenceTherearetwoattributivesafterthesubject“carbon”.“containedinthesefuels”—pastparticiplephrase“whichhasbeensafelyburiedundergroundformanymillionsofyears”—attributiveclause2.TranslatethesentenceintoChinese.这些燃料中所含碳，在过去数百万年岁月里一直安全地埋在地下，而现在正被烧成二氧化碳，并以天天数吨速率大量排放到大气中。Article4_S_1.12.Thus,notonlyismorecarbondioxidebeingaddedtotheatmospherethroughburningoffuel,butastheforestsdisappear,lesscarbondioxideisbeingremovedfromtheatmospherebyplants.1.What’sthegrammaticalfunctionof“notonly”atthebeginningofthesentence?

Inversionmustbeusedwhenanegativewordisputatthebeginningofasentence.

MoreExamples:NevershallIforgetthatdaywhenIwasadmittedintotheschool.2.TranslatethesentenceintoChinese.

所以，不但是经过燃料燃烧使更多二氧化碳被释放到大气中，而且，伴随森林消失，植物从大气中吸收二氧化碳也降低了。Article5_S_113.Itispeoplewhoareburningthecoal,oil,andgas.Itispeoplewhoarecuttingdowntheforests.Itispeople,then,whoarethevillains.Whatsentencepatternis

usedhere?

Stress.

Pattern:Itis/was+被强调部分+that/who/whom/which

+句中其它部分

MoreExamples:

Itwasayoungscientistwho/thatsolvedthisproblemfiveyearsago.2.TranslatethesentenceintoChinese.

是人在烧煤、烧油和烧气。是人在砍伐森林。所以，人才是真正元凶。2.Carbondioxideisoneoftheessentialgasestolifeintheatmosphere.FGlobeReading.2-part1.1TrueorFalseCarbondioxideisnotverypoisonousanditispresentintheatmosphereinsosmallaquantity—only0.034percent—thatitdoesusnoharm.1.Carbondioxideisverypoisonous,althoughitispresentintheatmosphereinasmallquantity,itdoesusharm.3.Thesealevelisrisingveryslowlyfromyeartoyear,mainlybecauseoftoomuchrainintheseareas.Itisbecauseofcarbondioxide.()T()F()4.Amongthegasesintheatmosphere,onlytheconcentrationofcarbondioxidemayresultinpreventingheataroundtheEarthfromescaping.()TPostReadingGlobeReading.2-part1.25.Theconcentrationofcarbondioxideincreasedsteadilyanditwillbetwicewhatisnowby.F6.Burningcoal,oilandnaturalgasarewaystoreducecarbondioxideintheatmosphere.()T()Coal,thenoilandnaturalgas,havebeenburnedforenergy.Thecarboncontainedinthesefuels,whichhasbeensafelyburiedundergroundformanymillionsofyears,isnowbeingburnedtocarbondioxideandpouredintotheatmosphereatarateofmanytonsperday.7.Peoplearetherealvillainsactually.8.Inordertosaveourselves,wemusthavenewsourcesoffuelthatdonotinvolvetheproductionofcarbondioxide.()()TTTrueorFalseAfterReading_1.11.温室效应

greenhouseeffect2.对某人造成损害

dosb.Harm3.生命必不可少

beessentialtolife4.将…转化为…convert…into…UsefulExpressions

5.起…作用

serveas…6.基本食物供给

basicfoodsupplyforsth.7.年复一年

fromyeartoyear8.极有可能

inalllikelihoodAfterReading_1.2以更加快速度低洼沿海地域

盛产粮食地域社会结构在…压力下发生大气中各种气体温暖地球表面atagreaterratelow-lyingcoastalareasproductivefarmingareasstructureofsocietyunderthepressurecomeaboutvariousgasesoftheatmospherewarmtheEarth’ssurface5.16.AfterReading_1.217.以…形式18.红外线辐射19.二氧化碳浓度

20.据预计21.地球平均温度22.极地冰盖23.用作燃料获取能量24.排放intheformofinfraredradiationconcentrationofcarbondioxideitisestimatedthat…Earth’saveragetemperaturethepolaricecapsbeburnedforenergypourintoAfterReading_1.325.近一两个世纪26.被加入…27.从…去除28.给某人一个新视角inthelastcoupleofcenturiesbeaddedto…beremovedfromgivesb.anewperspective29.新燃料源30.反对做某事newsourceoffuelobjecttodoingsth.AfterReading_2.6ParagraphWritingIntroductionAparagraphisasetofsentences,alldealingwiththesamegeneralideaandlinkedtogetherinasmoothsequence.Thesentencesthatsupportandexpandthetopicmayincludefacts,examples,illustrations,definitions,andexplanations.Theprogressionfromonesentencetothenextisclearertoreadifthewritercarefullyincludestransitions.Atransitionmaybeaspecificwordorphraseassociatedwithaparticularmodeloforganization;itmaybeaword,phrase,orideafromonesentencerepeatedinthenext;itmaybethestructureofaphraseorclausefromonesentenceparalleledinthenext;oritmaybearhetoricalquestionthatlinkstwopartsofaparagraph.TopicSentence(GeneralIdea)

(transition)DevelopingSentence1Conclusion(transition)DevelopingSentence3(transition)DevelopingSentence2GuidedWritingAfterReading_2.7AnExampleNowadays,withtherapiddevelopmentofITandinformationindustry,callphoneplaysadominantroleinpeople’slife.Theyhavemanyfavorableaspects.