2020版高考英语总复习Unit4Globalwarming课时作业选修6.docx

Unit4 Global warming.阅读理解ANaturehasitsownwayofbalancingitselfout,butwhenwehumansgetinvolved,wetendtothrowthingsoutofcontrol.Forestsandoceansarenaturalcarbonsinksthatabsorbcarbondioxidefromtheatmosphere,butsincewevebeenpumpingtoomuchintotheair,thosesinkscantkeepup.ScientistsattheMaxPlanckInstituteinGermany,ledbybiologistTobiasErb,havefiguredoutawaytosuperchargeplantstomakethembetteratabsorbingCO2,whichcouldbeakeydefenseagainstclimatechange.Erbandhisteamfiguredoutawaytomakeplantsmoreefficientatabsorbingcarbon,sothattheyconsumedmorecarboninashorteramountoftime. “Ifyouthinkaboutplants,theyareefficientCO2-fixingfilters,buttheyarenotfast,” Erbsaid. “Ithinkthereisachancetoimproveexistingbiologywithsynthetic(人造的)biology.”Erbsteamidentified17enzymes(酶)fromninedifferentorganisms,re-engineeringthreeofthem,thathadanenlargedcarbonconsumption.Whenthoseenzymesworkedtogetherasateam,theyworkedbetteratnotonlyplantsnaturalenzymes,butalsothemselvesindividually.Existingenzymesinplantsconsumeabout5to10molesofCO2persecond.TheteamofenzymesthatErbusedconsumed80molespersecond.Sofar,theseenzymeshaveonlybeentestedintesttubesinthelab,butthenextstepisrealworldtestingwheretheenzymeswouldbeintroducedintoplantstoseeifthesameresultoccurs.Ifthosetestsshowthatplantsreallycanbesupercharged,wecouldhaveanewtoolinthefightagainstclimatechangewherenotonlydoweprotecttheamazingcarbon-absorbingforestswehave,butwealsoaddthesesuperplantsoranartificialleaftechnologyusingtheenzymesintoothermixedfields.1.Whycantforestsandoceansbalancenature?A.Becauseoceansandforestsaregettingsmaller.B.BecausewehumanbeingsgiveofftoomuchCO2.C.Becausealargenumberofforestsarecutdown.D.Becausetherearetoomanycreaturesintheworld.2.WhichisthekeydefenseagainstclimatechangeaccordingtoErbandhisteam?A.ToincreasetheplantsabilityandefficiencytoabsorbCO2.B.TomakeoceansandforeststoabsorbmoreCO2quickly.C.ToreducethehumanactivitiesgivingofftoomuchCO2.D.Toincreasethenumberofplantsintheworld.3.Whatcanwegetfromthelastparagraph?A.Theenzymeshaveprovedusefulinrealworld.B.Thetechnologyhasworkedagainstclimatechange.C.Theenzymeshavenotbeenusedinthelab.D.Thetechnologymayhaveabrightfuture.4.Thispassageisintendedto.A.introduceapossiblewaytobetterplantsabilityofabsorbingCO2B.callonpeopletopaymoreattentiontothebalanceofnatureC.analysethecauseandresultofclimatechangerelatedtoplantsD.explorethepossibilityofusingplantstofightagainstclimatechangeBTodaytropicalrainforestsaredisappearingfromthefaceoftheglobe.Despitegrowinginternationalconcern,rainforestscontinuetobedestroyedatapaceover80,000acresperday.Worldrainforestcovernowstandsataround2.5millionsquaremiles.Humanactivitieshavehadaneffectonmuchofthisremainingarea.Deforestation(滥伐森林)oftropicalrainforestshasaglobaleffectthroughspeciesextinction,thelossofimportantecosystemservicesandrenewableresources,andthereductionofcarbonsinks.However,thisdestructioncanbeslowed,stopped,andinsomecasesevenreversed(逆转).Mostpeopleagreethattheproblemmustbesolved,butthemeansarenotassimpleasbuildingfencesaroundtheremainingrainforestsorbanningthewoodtrade.Economic,political,andsocialpressureswillnotallowrainforeststocontinuetoexistiftheyarecompletelyclosedofffromuseanddevelopment.So,whatshouldbedone?Thesolutionmustbebasedonwhatispractical,notcompletelyidealisticandshoulddependondevelopingaconservationapproachbuiltontheprincipleofsustainable(不破坏生态平衡的)useanddevelopmentofrainforests.Beyondtheresponsibledevelopmentofrainforests,effortstorestoredamagedforestlandsalongwiththeestablishmentofprotectedareasarekeytosecuringrainforestsforthelong-termbenefitstheycanprovideformankind.Historicalapproachestorainforestconservationhavefailed,asshownbytheincreasedrateofdeforestation.Inmanyregions,closingoffforestsasuntouchableparksandreserveshasneitherimprovedthequalityoflivingoreconomicopportunitiesfortheruralpoor,norstoppedforestclearingbyillegalwoodcuttersanddevelopers.Theproblemwiththistraditionalapproachtopreservingwildlandsindevelopingcountriesisthatitfailstodeveloppropereconomicmotivesforpreservingtheforest.Localpeopleandthegovernmentitselfmustseefinancialreturnstoprovethecostsofmaintainingparksfromeconomicactivities.5.Whathascausedsomespeciesextinctioninthetropicalrainforests?A.Humansdestroyingthetrees.B.Carbonsinksbeingreduced.C.Lackingrenewableresources.D.Fencesnotbeingbuiltaroundtherainforests.6.Whatcanbeinferredfromthepassage?A.Tropicalrainforestscanbeeasilypreserved.B.Rainforestsmustbeclosedofftobebetterprotected.C.Humanactivitieshavealittleeffectontropicalrainforests.D.Economicreturnscanmakesomedifferenceinprotectingtropicalrainforests.7.Whatistheauthorsattitudetotropicalrainforestprotection?A.Indifferent.B.Concerned.C.Doubtful.D.Puzzled.8.Whatisthepurposeofthepassage?A.Toshowthebadeffectsofdeforestation.B.Tostresstheimportanceoftherainforests.C.Toappealforrightwaystosavetherainforests.D.Tointroducethefactofforestsdisappearing.语法填空阅读下面短文,在空白处填入1个适当的单词或括号内单词的正确形式。EarthDayisanevent1.(annual)celebratedonApril22.2.(found)bySenatorGaylordNelson,anAmericanpoliticianandenvironmentalist,itwasoriginallyaimedathelpingthepublictoknowthecurrentsituationofairandwaterpollutionand3.(get)peopletocareabouttheearth.In1962,RachelCarsonsbest-sellingbookSilentSpringcreatedan4.(aware)ofthedangerouseffectsofpesticides(农药).Then,afire,5.brokeoutin1969onCuyahogaRiver,shedlightontheproblemofchemicalpollutioninwater.SenatorGaylordNelsondreamedof6.similarlargeeventthatwouldgetpeopletotakeenvironmentalissuesseriously.In1969,hewasinspiredbyprotestsagainsttheVietnamWarandcameupwiththeideaforEarthDay.Inthefallof1969,Nelsonannounceditandappealedtotheentirecountrytogetinvolved.Consequently,telegrams,lettersandtelephonecalls7.alloverthecountrypouredin.Since1970,EarthDaycelebrationhasgrown.Later,Nelson8.(award)thePresidentialMedalofFreedominrecognitionofhiswork.Today,EarthDayiscelebratedaroundtheworldeveryApril22.SometimesnumerouscommunitiescelebrateEarthWeek,anentireweekof9.(activity)focusedontheenvironmentalissues.In2017,theMarchforScience10.(occur)onEarthDay(April22,2017)andwasfollowedbythePeoplesClimateMobilization(April29,2017).短文改错NextSunday,thetwenty-fiveofOctober,wearehaveanopendayatourschool.Itsgoingtobeabouttheenvironment,withkindsoffunthingshappen.Ourgeographyteacherwillshowadocumentaryfilmaboutairpollute.Ourscienceteacherisrunningaworkshopwithpracticalideasonwhattodowiththingscanberecycled,likenewspapersandbox.ThenintheeveningDrLyndaPotter,aenvironmentalist,isgoingtogiveatalk.Itwillbeaboutwhateveryonecandosomethingtohelptheenvironment.Theywillalsobebooksforsaleaboutprotectingtheenvironment.Ithinkitsgoingtobearealgoodday.课时作业(二十九).A【文章大意】 本文是一篇说明文,主要介绍了一种改善植物吸收二氧化碳能力的方法。1.B细节理解题。根据第一段第二句“Forestsandoceansarenaturalcarbonsinksthatabsorbcarbondioxidefromtheatmosphere,butsincewevebeenpumpingtoomuchintotheair,thosesinkscantkeepup.”可知,森林和海洋不能够平衡自然是因为人类排放了过多的二氧化碳,故选B。2.A细节理解题。根据第一段最后一句可知,增加植物吸收二氧化碳的能力和有效性是应对气候变化的关键,故选A。3.D推理判断题。根据最后一段“Ifthosetestsshowthatplantsreallycanbesupercharged,wecouldhaveanewtoolinthefightagainstclimatechangewherenotonlydoweprotecttheamazingcarbon-absorbingforestswehave,butwealsoaddthesesuperplantsoranartificialleaftechnologyusingtheenzymesintoothermixedfields.”和对本段的整体理解可推知,这项技术前途光明,故选D。4.A写作意图题。第一段点题并结合对全文的整体理解可推知,本文主要介绍了一种通过改善植物吸收二氧化碳的能力来应对气候变化的新技术,故选A。B【文章大意】 本文是一篇说明文。文章说明了热带雨林在逐渐从地球上消失,分析了其消失的原因及带来的后果,并提出了对热带雨林保护的新措施。5.A细节理解题。根据第二段第一句“Deforestation(滥伐森林)oftropicalrainforestshasaglobaleffectthroughspeciesextinction”可知,人类对热带雨林的滥砍滥伐导致了一些物种的消失,故选A。6.D推理判断题。根据第五段最后一句“Localpeopleandthegovernmentitselfmustseefinancialreturnstoprovethecostsofmaintainingparksfromeconomicactivities.”可知,经济效益对保护热带雨林有一定影响,故选D。7.B推理判断题。根据文章大意可知,作者阐述了热带雨林正在消失的现状,并呼吁找到拯救热带雨林的合理措施,故选B。8.C写作意图题。根据全文内容,尤其是第三段第二句“Thesolutionmustbebasedonwhatispractical,notcompletelyidealisticandshoulddependondevelopingaconservationapproachbuiltontheprincipleofsustainable(不破坏生态平衡的)useanddevelopmentofrainforests.”以及第四段第一句“Historicalapproachestorainforestconservationhavefailed”可知,该篇文章的写作目的是呼吁找到拯救热带雨林的合理措施,故选C。.【文章大意】 本文是一篇说明文,主要介绍了“地球日”的起源及发展。1.annually考查词性转换。修饰动词的词一般为副词,故用副词annually修饰动词celebrated,在句子中作状语。2.Founded考查非谓语动词。found和句子的谓语之间没有连词,且与表示被动的介词by呼应,表示被动完成的概念,故填Founded。3.getting考查动名词。根据语境and提示可知,此处与动名词helping并列,故用getting作介词at的宾语。4.awareness考查词性转换。与语境中定冠词the和介词o