大學英語精讀第二冊Unit 5-2公開課一等獎省優(yōu)質(zhì)課大賽獲獎課件

Unit5

TheVillainintheAtmosphere

Lead-in1.Whatarethefactorsofcausingglobalwarming?2.Whattheinfluenceofglobalwarming?因為全球變暖而產(chǎn)生氣候問題—臺風構想—若干年后景象全球氣候變暖一些證據(jù)造成氣候變暖原因水污染酸雨危害物種加速滅絕人口劇增土地遭侵蝕沙化大氣環(huán)境污染森林資源銳減海洋生態(tài)環(huán)境惡化氣候變暖阿爾卑斯山脈-瑞士http://qingyuan_/非極地冰川大范圍縮小，雪蓋面積下降，永久性凍土退化http://qingyuan_/長江源最大冰川近40年退縮4000米http://qingyuan_/應付全球變暖之終極武器—水上樓房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，在大氣層中含量極小——只占0.034％——不會對我們造成任何傷害。Article1_SSentencestructures2.Buthereiswhatthisapparentlyharmlessandcertainlyessentialgasisdoingtous:

(1).AnalyzethestructureofthesentenceItisaninversion.“here”isusedatthebeginningofthesentence.Thesubjectofthesentenceisacomplexsentence,consistingofasubjectclause“whatthisapparentlyharmlessandcertainlyessentialgas.”(2).TranslatethesentenceintoChinese.然而，這一看上去無害而且無疑又必不可少氣體卻正在對我們產(chǎn)生影響。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(在這些地域居住著世界上很大一部分人口)，海水會穩(wěn)步向前推進，迫使人們向內(nèi)陸退居。

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

“as”作為連接詞引導了方式狀語從句，為了保持句子平衡，使用倒裝句。MoreExamples:Hetraveledagreatdealasdidmostofhisfriends.2.TranslatethesentenceintoChinese.佛羅里達將會淹沒在海浪之下，英倫三島大部分，人口稠密尼羅河流域，還有中國、印度和俄羅斯低洼地域也都將遭到一樣命運。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.太陽光照射大氣層頂部，徑直透過數(shù)英里大氣層，溫暖著地球表面。Article2_S_1

7.However,theatmosphereisnotquiteastransparenttoinfraredradiationasitistovisiblelight.Paraphrasethesentence.Theatmosphereisclearertovisiblelightthanthattoinfraredradiation.2.TranslatethesentenceintoChinese.然而，大氣層對紅外線來說并不像它對可見光那樣透明。Article3_S_19.Wecanbethankfulthatcarbondioxideiskeepinguscomfortablywarm,buttheconcentrationofcarbondioxideintheatmosphereisgoingupsteadilyandthatiswherethevillainycomesin.

TranslatethesentenceintoChinese.我們該感到欣慰，二氧化碳給我們溫暖使我們舒舒適服，不過大氣中二氧化碳濃度正在穩(wěn)步升高，其惡跡也就由此而生。Article3_S_110.Eachyearsince,theconcentrationhascreptupwardanditnowstandsat0.0340percent.

(1).Paraphrasethesentence.Since1958,everyyearthegatheringofcarbondioxidehasincreasedandnowitwasabout0.0340percent.(2).TranslatethesentenceintoChinese.今后每年，其濃度逐年悄悄攀升，而現(xiàn)在已到達0．0340％。11.Thecarboncontainedinthesefuels,whichhasbeensafelyburiedundergroundformanymillionsofyears,isnowbeingburnedtocarbondioxideandpouredintotheatmosphereatarateofmanytonsperday.1.AnalyzethestructureofthesentenceTherearetwoattributivesafterthesubject“carbon”.“containedinthesefuels”—pastparticiplephrase“whichhasbeensafelyburiedundergroundformanymillionsofyears”—attributiveclause2.TranslatethesentenceintoChinese.這些燃料中所含碳，在過去數(shù)百萬年歲月里一直安全地埋在地下，而現(xiàn)在正被燒成二氧化碳，并以天天數(shù)噸速率大量排放到大氣中。Article4_S_1.12.Thus,notonlyismorecarbondioxidebeingaddedtotheatmospherethroughburningoffuel,butastheforestsdisappear,lesscarbondioxideisbeingremovedfromtheatmospherebyplants.1.What’sthegrammaticalfunctionof“notonly”atthebeginningofthesentence?

Inversionmustbeusedwhenanegativewordisputatthebeginningofasentence.

MoreExamples:NevershallIforgetthatdaywhenIwasadmittedintotheschool.2.TranslatethesentenceintoChinese.

所以，不但是經(jīng)過燃料燃燒使更多二氧化碳被釋放到大氣中，而且，伴隨森林消失，植物從大氣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+被強調(diào)部分+that/who/whom/which

+句中其它部分

MoreExamples:

Itwasayoungscientistwho/thatsolvedthisproblemfiveyearsago.2.TranslatethesentenceintoChinese.

是人在燒煤、燒油和燒氣。是人在砍伐森林。所以，人才是真正元兇。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.溫室效應

greenhouseeffect2.對某人造成損害

dosb.Harm3.生命必不可少

beessentialtolife4.將…轉化為…convert…into…UsefulExpressions

5.起…作用

serveas…6.基本食物供給

basicfoodsupplyforsth.7.年復一年

fromyeartoyear8.極有可能

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

盛產(chǎn)糧食地域社會結構在…壓力下發(fā)生大氣中各種氣體溫暖地球表面atagreaterratelow-lyingcoastalareasproductivefarmingareasstructureofsocietyunderthepressurecomeaboutvariousgasesoftheatmospherewarmtheEarth’ssurface5.16.AfterReading_1.217.以…形式18.紅外線輻射19.二氧化碳濃度

20.據(jù)預計21.地球平均溫度22.極地冰蓋23.用作燃料獲取能量24.排放intheformofinfraredradiationconcentrationofcarbondioxideitisestimatedthat…Earth’saveragetemperaturethepolaricecapsbeburnedforenergypourintoAfterReading_1.325.近一兩個世紀26.被加入…27.從…去除28.給某人一個新視角inthelastcoupleofcenturiesbeaddedto…beremovedfromgivesb.anewperspective29.新燃料源30.反對做某事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.