高考英语 Unit 3 Inventors and inventions要点梳理+重点突破 新人教版选修8
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选修8 Unit3 Inventorsandinventions要点梳理高效梳理·知识备考●重点单词1.distinguishvi.&vt.显示……的差别;使……有所不同;辨别2.mercifuladj.宽大的;仁慈的;慈悲的→mercyn.宽大;仁慈3.productn.产品4.abruptadj.突然的;意外的→abruptlyadv.突然地,唐突地5.convenientadj.便利的,方便的,就近的→conveniencen.方便,便利→convenientlyadv.便利地,方便地6.cautionn.小心,谨慎→cautiousadj.小心的,谨慎的→cautiouslyadv.小心地,谨慎地7.passiveadj.被动的;消极的;被动语态的8.seizevt.抓住;捉住;夺9.filen.文件;档案;文件夹vt.提交;将……归档10.freezingadj.冰冻的;严寒的→freezev.冰冻11.innocentadj.清白的;无罪的;天真的→innocencen.天真,清白12.bearvt.忍受;忍耐;负担13.tapvt.轻打;轻拍;轻敲n.轻轻地敲击(声);(水)龙头14.currentn.(水或气)流;电流adj.现在的;当前的15.stableadj.稳固的;稳定的;安定的16.associatevt.联想;联系n.同伴,伙伴17.practicaladj.实际的;实践的;实用的18.competencen.能力;胜任;本领21\n●重点短语1.callup 给……打电话2.nowandthen偶尔;有时3.setabout开始;着手4.diveinto迅速把手伸入;一心投入5.setout(todo)开始(做)6.hangon不挂断;稍等;紧紧握住7.outoforder次序颠倒;发生故障8.getthrough设法联系上(尤指打通电话);(设法)做完;通过9.ringback回复电话10.ringoff挂断电话●重点句型1.ThenextmorningIgotupearlybeforethesunwashot.第二天早上趁天还不太热,我就早早地起来了。2.Butoncepickedup,theytriedtobiteme.但是它们一被捡起来,就试图咬我。3.Onlyafteryouhavehadthatrecognitioncanyousaythatyouaretrulyaninventor.只有在你获得了那种认证后,你才能说是一个真正的发明家。4.Thecriteriaaresostrictthatitisdifficulttogetnewideasacceptedunlesstheyaretrulynovel.(评定)专利标准是很严格的,除非新的想法真是新颖的,否则很难被接受。5.Remembertoincludeonechangetoyourinventionincaseitdoesn‘tworkthefirsttime.记住对你的发明要有变化的余地,以防它第一次不起作用。21\n●高考范文(2007·海南,宁夏,全国Ⅰ)假定你是李华,希望通过外籍教师Peter找一位英国笔友。请写一封短信,描述一下你理想中笔友的条件,并说明为什么选这样的笔友。具体条件包括:1.年龄; 2.性别; 3.爱好(旅游、运动、养宠物等)。注意:1.词数100左右;2.可以适当增加细节,以使行文连贯;3.开头和结尾已为你写好。DearPeter,Iamwritingtoaskwhetheryouareabletodomeafavor.________________________________________________________________________Bestregards,LiHua[范文]Dear_Peter,I_am_writing_to_ask_whether_you_are_able_to_do_me_a_favor.Iwanttohaveapenfriend,hopefullyagirlinherearlytwenties,andwithinterestssimilartomine.Inmymind,sheissomeonewhoisinterestedintraveling,swimming,andplayingtabletennis.Besides,itwouldbebetterforhertohaveapetdogasIhavekeptoneathomeforsometime.Withsuchapenfriend,IhopeIcansharewithherourexperiencesintraveling,takingcareofpets,orwhateverwehaveincommon.AndIbelieveIwillimprovemyEnglishbydoingsoandlearnmoreabouthercountry.Ilookforwardtohearingfromyousoon.Best_regards,Li_Hua考点探究互动探究·能力备考21\nⅠ.词汇短语过关1.distinguishvi.&vt.辨别;显示……的差别distinguishedadj.卓越的,著名的,杰出的distinguishableadj.易分辨的,能区分的distinguishbetween...and...区分/辨别……和……distinguish...from...使……有别于……,使……具有区别于……的特征distinguishoneself(as...)(作为……)表现突出bedistinguishedby/for以……为特征/著名[即学即练1](1)He‘s____________________himself______ateacher.作为老师,他早已负有盛名。(2)Weshould__________________major______minorworkandnotputthetrivialabovetheimportant.我们的工作要分主次,不能轻重倒置。distinguishedasdistinguishbetweenand(3)Whatwasitthat_____________her______herclassmates?是什么使得她有别于班上其他同学呢?distinguishedfrom2.convenientadj.方便的;便利的;附近的conveniencen.方便,便利Itisconvenientforsb.todosth.做某事对某人来说是方便的。Sth.beconvenientto/forsb.对某人来说……是方便的。atsb‘sconvenience在某人方便的时候21\nconveniencefood方便食品conveniencestore便利店[即学即练2](1)Wemust____________aconvenienttimeandplace______themeeting.我们必须安排一个合适的时间和地点开会。(2)Whenwould________________________youtogo?你什么时候去方便?(3)Thehotelhasarestaurantfortheguests'_________.这家旅馆为方便旅客设有餐厅。arrangeforitbeconvenientforconvenience3.seizevt.抓住,捉住;把握(机会等);夺取某物,占领某地seizesth.突然抓住seizeanopportunity抓住机会seizepower夺取政权beseizedwith被……侵扰;患/得(病)seizesb.bythearm抓住某人的手臂[即学即练3](1)He__________________andshookitheartily.他拉住她的手高兴地握着。(2)Theenemy__________________afteraviolentattack.敌人猛攻后占领了这个城镇。(3)He________________________goingabroad.他抓住了那次出国的机会。seizedherhandseizedthetownseizedthechanceof21\n(4)He_________________aslightattackoffever.他有一点发烧。wasseizedwith4.bearvt.(bore,borne)忍受;忍耐;负担;生育beardoing/n./todo忍受……bearsb./sb.’sdoing忍受某人做某事bearsb./sth.out证实;为……作证bearwithsb./sth.耐心对待;容忍bearsth.inmind牢记[即学即练4](1)Icouldn‘t__________________anylonger,soIlefttheroom.我实在听不下去了,就离开了房间。(2)Ican’t_________________waiting.我不能忍受长时间的等待。(3)Idoubtifthatchairwill__________________.我怀疑那把椅子能否承受得了你的体重。beartolistenbearbeingkeptbearyourweight(4)Youmust________________________thatyourparentshopetodependonyoutobecomeadoctor.你要记住你的父母指望你成为一名好医生。(5)She____________threechildren.她生了三个孩子。bearitinmind hasborne(6)Who____________theresponsibility/expense?谁要负担这责任/费用呢?21\nwillbear提示:(1)bear作“忍受”讲时,其后接动名词做宾语,表示习惯性的动作,也可接不定式做宾语,表示某一次具体的动作,且多与can,could及beableto等连用。(2)borne和born是bear的两个过去分词,表示“出生,出世”时用born,并且仅用于被动语态,表示“生育”时用borne。5.associatevt.联想,联系n.同伴,伙伴accociationn.联合;联想;交往;协会;团体associatesb./sth.withsb./sth.把……和……联系在一起;由……联想到……beassociatedwith...和……有关associatewithsb.与某人交往或常打交道associateoneselfwithsth.声称或表示自己赞同某事物inassociationwith...与……合伙/合作[即学即练5](1)I’venever_____________you______thisplace.我从未把你和这个地方联系在一起。(2)Iwouldn’twantto__________________Mckey’sproject.我不想和麦基的计划有任何瓜葛。(3)Idon’tliketheselayaboutsyou’re____________.我不喜欢你结交的这些游手好闲的人。associatedwithbeassociatedwithassociatingwith6.callup召唤;使人想起;提出;打电话callat访问(某地)callon/upon访问(某人)callonsb.todosth.号召某人做某事21\ncallback召回,撤销callfor需要;要求callout大声喊叫callforth唤起,引起callin召集;收回calloff取消[即学即练6](1)Thetrip_____________________________ofmyyouth.旅行勾起了我对年轻时代的美好回忆。(2)He____________alltheinformationfromthecomputer.他从计算机中调出了所有的信息。calleduphappymemoriescalledup(3)He________________justtotellmethathehadboughtanewDVD.他打电话就是为了告诉我他买了一台新的DVD。calledmeup拓展:与打电话有关的短语:ring/callup打电话ring/callback回复电话ringoff挂断电话givesb.aring给某人打电话sb.bewantedonthephone有某人的电话answerthephone接电话hang/holdon不挂断电话7.setabout(doingsth.)开始;着手干某事setaside留出,拨出(时间、金钱等),把……置于一旁setoutfor=setofffor=leavefor出发到某地去setouttodo开始做……21\nsetdown写下;记下;规定setoff动身;起程;激起;引起;使爆炸setup建立;设置;创建;开办[即学即练7](1)Youmust________________________atonce.你必须立即开始工作。(2)Doyouknowhowto__________________onthiswork?你知道怎样着手进行这项工作吗?(3)Bellnever________________________thetelephone.(=Bellnever______________________thetelephone.)贝尔从来没打算去发明电话。setaboutyourwork setaboutgoingsetouttoinventsetaboutinventing(4)Whenarewe____________(=___________)onourtrip?我们什么时候动身去旅行?settingoutsettingoff8.getthrough打通(电话),完成(工作),通过(考试);克服(困难)getacross被理解;使人了解getdownto认真地静下心(工作)(to为介词)geton/along相处getoutof避免;摆脱getover克服getin收获getaround/round到处走动;传播出去getaway/off逃脱,离开[即学即练8]写出下列句子中getthrough的意思。(1)Itriedseveraltimes,butcouldn'tget21\nthrough.___________________(2)You'llgetthroughthisproblem._________________________打通(电话)克服(困难)(3)I'llgetthroughthisworkbynoon.____________________(4)Wewereverygladwhenweheardthatyouhadgotthroughyourexam.___________________完成(工作)通过(考试)拓展:gothrough经历;翻阅;检查lookthrough浏览,仔细检查livethrough活过一段时间;经历putthrough把电话接通Ⅱ.重点句型详解1.Butonce_picked_up,_theytriedtobiteme.但是它们一被捡起来,就试图咬我。(1)once作为连接词引导时间状语从句时,后面可接现在分词或过去分词。①Onceopened,themuseumwillbeverypopularwiththecitizens.博物馆一旦开放,肯定会受到市民的欢迎。(表被动)②Oncetalkingwithhim,you'llfindhimaneasygoingman.一旦与他交谈,你就会发现他是一个随和的人。(表主动)(2)once引导的从句中,要用一般时代替将来时。①OnceyouhavegraspedEnglish,you'llbeeasytogetawell-paidjob.一旦你掌握了英语,你就会很容易找到一份报酬很高的工作。(现在完成时代替将来完成时)21\n②Oncehearrives,wecanstart.他一到我们就可以开始。(一般现在时代替一般将来时)[即境活用1] (2007·福建)Youwillbesuccessfulintheinterview______youhaveconfidence.A.before B.onceC.untilD.though答案:B解析:考查状语从句。once“一旦”引导时间状语从句。before“在……以前”;until“直到……”;though“虽然”。2.Remembertoincludeonechangetoyourinventionin_caseitdoesn’tworkthefirsttime.记住对你的发明要有变化的余地,以防它第一次不起作用。incase(以防)万一incase后可接从句,也可置于句末。incaseof要是……;在……时候(后接名词或代词)inthiscase如果这样的话inthatcase如果那样的话inanycase无论如何innocase决不(位于句首,句子应使用倒装语序)①Takeyourumbrellaincaseitrains.拿着你的雨伞以防下雨。②IncaseIforget,pleaseremindmeofmypromise.如果我忘记了我的诺言,请提醒我。③Incaseoffire,openthissafetydoor.一旦发生火灾,打开这扇安全门。④Innocasemayyouleavethebabyaloneathome.你决不能把孩子一个人留在家里。[即境活用2] (2007·北京)Leaveyourkeywithaneighbor______youlockyourselfoutone21\nday.A.eversinceB.evenifC.soonafterD.incase答案:D解析:A项意为“自从……以来”,B项意为“即使”,C项意为“不久之后”,D项意为“以防;以免”。句意为“留一把钥匙给邻居,以免有一天你把自己锁在门外”。易错点拨自我完善·误区备考case构成的短语的用法[应用] (1)Itisreportedthattherewillbeaheavyraintomorrow,______thehikewouldbeputoff.A.inanycaseB.inwhichcaseC.innocaseD.incase答案:B解析:该题考查case的相关短语及定语从句,根据前面说“据说明天有大雨”,可知hike在这种情况下要推迟,which引导定语从句,指代整个主句。(2)-Thefirstbushasjustleftandthenextbuswillcomeintwentyminutes.-______,wewillhavetowait.A.InthiscaseB.InthiswayC.BythismeansD.Intheend答案:A(3)Johnmayphonetonight.Idon’twanttogoout______hephones.A.aslongasB.inorderthatC.incaseD.sothat答案:C解析:aslongas意为“只要”,inorderthat意为“为了”,incase意为“以防”,sothat意为“以致;为了”。incase引导条件状语从句。(4)Idon’tthinkI’llneedanymoney,butI’llbringsome______.A.atlastB.in21\ncaseC.onceagainD.intime答案:B解析:根据句子中所说自己目前不需要钱,可是要带一点备用或者以防万一。incase是“以防万一”的意思,恰好符合此意。intime是“及时,恰好,迟早”的意思。(5)You’dbettertakesomethingtoreadwhenyougotoseethedoctor______youhavetowait.A.evenifB.asifC.incaseD.inorderthat答案:C高效作业自我测评·技能备考Ⅰ.单词拼写1.Successinmoney-makingisnotalwaysagoodc__________ofrealsuccessinlife.2.It’sf___________outside.You’dbetterputonmoreclothes.3.Thepacketofwhitep_________thepolicefoundinhisroomturnedouttobecocaine.4.Whatweneedisas__________government.5.Yourinventionisingenious,butnotveryp__________.criterion freezingpowderstablepractical6.Heis__________(清白的,无罪的)ofthecharge.7.He_____________(使……扬名)himselfbyhiscourageatthattime.8.Ikeepmyreferencebooksnearmydeskfor_________(方便).9.Heatealightlunchin____________(期望)ofagooddinner.10.Shelikesinventionsandshehasappliedfor________(专利).21\ninnocent distinguishedconvenienceexpectationpatentⅡ.单项选择1.-Jack,you______onthephone.-______.A.arewanted;ComingB.areneeded;I’mcomingC.arecalled;I’llcomeD.arerungup;Thanks答案:A解析:考查电话用语。叫人接电话时常用表达有:Youarewantedonthephone./Thereisacallforyou./Foryou.回答用:I’mcoming.或Coming.2.Whoeverinvented______wheelisbelievedtohavemade______mostusefulinventionin______history.A.a;the;/ B.the;the;/C.the;/;/D.a;a;the答案:B解析:发明物的前面必须用the;第二空用the表示最高级,故加定冠词the;inhistory为固定搭配,意为“在历史上”,不加任何冠词。3.Watercanabsorbandgiveoffalotofheatwithoutbigchangesintemperature,thuscreatinga______environment.A.peacefulB.sensitiveC.commonD.stable答案:D解析:A项“平静的”;B项“敏感的”;C项“共同的”;D项“稳定的”。句意为:水能吸收和放出许多热量,这在温度上没有大的变化,因而就创造出了一个稳定的环境。21\n4.Havingdecidedtorentaflat,we______contactingalltheaccommodationagenciesinthecity.A.setaboutB.setdownC.setoutD.setup答案:A解析:考查动词短语。setaboutdoing=setouttodo开始着手做某事;setdown写下,记下;setup建立。5.Colorblindpeopleoftenfinditdifficultto______betweenblueandgreen.A.separateB.distinguishC.compareD.contrast答案:B解析:句意为:色盲的人经常感到很难区分蓝色和绿色。separate“分离,分开”,但与between不能连用;distinguishbetween“分辨,辨别”;compare(to/with)比较,对照;contrast(with)形成对比。6.Whenweplanourvacation,Motheroftenoffers______suggestions.A.carefulB.practicalC.effectiveD.acceptable答案:B解析:本题考查形容词词义辨析。careful“仔细的,小心的”;practical“可行的,实用的”;effective“有效的,生效的”;acceptable“可接受的,受到欢迎的”。本句的意思是:当我们计划假期的时候,妈妈经常提出实用、可行的建议。因此B项最佳。7.—Areyoureadytoleave?—Almost.I'llbereadytogoassoonasI______puttingthecleandishesaway.A.getthroughB.giveupC.goonD.setabout答案:A解析:getthrough(doing)sth.完成某事。giveup(doing)sth.放弃;goondoing继续;setaboutdoing开始做。8.IamsurethatLaura'slatestplay,______staged,willproveagreatsuccess.A.sinceB.21\nunlessC.onceD.until答案:C解析:考查“once+过去分词”。其中为省略句oncethelatestplayisstaged。9.(2010·安徽皖南八校二联)WithoutthehelpofmyEnglishteacher,I______thefirstprizeintheEnglishspeakingcompetition.A.wouldwinB.wouldhavewonC.wouldnotwinD.wouldnothavewon答案:D解析:考查虚拟语气。这是一个隐含的虚拟条件句,含有ifmyEnglishteacherhadn‘thelpedmewithmyspokenEnglish之意,表示与过去的事实相反,故用与过去相反的虚拟语气,因此D项符合题意。10.Woulditbe______foryoutopickmeupatfouro'clockandtakemetotheairport?A.freeB.vacantC.handyD.convenient答案:D解析:句意:你四点钟接我并把我送到机场方便吗?Itisconvenientforsb.todosth.某人做某事方便。11.Doesthismealcost$50?I______somethingfarbetterthanthis!A.preferB.expectC.suggestD.suppose答案:B解析:考查动词辨析。expect期望;期盼;prefer更喜欢;suggest建议;suppose猜想;认为。12.Hecan'tbear______inpublic.A.tolaughatB.tobelaughedatC.laughingatD.laughat答案:B解析:本题中bear为“承受”的意思。也可表示为bearbeinglaughedat。21\n13.AsIgrewupinasmalltownatthefootofamountain,thevisittothevillage______scenesofmychildhood.A.calledupB.calledforC.calledonD.calledin答案:A解析:A.“唤起”,B.“需要”,C.“号召”,D.“召集”。本题题意为“……本次参观使我想起了童年的情景”。因此选A。14.(2010·北京东城期末)-Hello,everyone!HaveyouheardthemeetingwillbeputofftillnextTuesday?-That'swhatwe______aboutwhenyoucamein.A.aretalkingB.weretalkingC.talkD.talked答案:B解析:考查动词的时态。“那就是你进来时我们正在讨论的事情”。此处“讨论”的动作发生在“你进来时”,所以用进行时态,同时从camein可以看出用“过去进行时态”。答案应该选B项。15.(2010·唐山摸底考试)Hewassodeepinthought,thinkingoftheproblem______heknockedintothetreewithoutnoticingit.A.whenB.whileC.becauseD.that答案:D解析:考查状语从句的引导词。so...that表示“如此,以致”。他思考问题太投入了,以致一不留神儿撞到了树上。Ⅲ.阅读理解AChinawillplantomakenewrulestogivemorecontrolsoverthegrowingnumberofblogsandwebcasts(网上直播).Nowadays,advancednetworktechnologies,suchasHoggingandwebcasting,arebeingimprovedtochallengethegovernment'sabilitytowatchovertheInternet.ChinesegovernmentwasinthemiddleofmakingnewrulesoverInternetpublishing,andblogsandwebsitesthatpublishingwebcastswouldfallundertheserules.21\nGovernmentofficialshopethenewruleswouldensureamorehealthyandactiveInternetenvironmentandwouldfullyrespectandprotectChinesecitizens'freedomofspeech.Specificdetailsonwhatkindofruleswouldbecarriedoutarestillunknowntothepublic.Despitethegrowingpopularity,bloggersandwebcastershavebeenunpopularwithpublicationinstitutions.In2006,aseriesofcasesinvolvingbloggerswhohaddivedintootherpeople'sprivacyandwrittenmaterialsruiningothers'fameurgedthegovernmenttoconsiderwhethertorequirebloggerstousetheirrealnameswhentheylogin.Webcastingwithoutcopyrightandillegally“copying”productsfromcopyrightedmaterialshavealsoledgovernmentofficialstoconsiderstartinganationwidecheckofonlinevideobroadcasting,andallowonlyqualifiedwebsitestocontinueofferingwebcasts.1.Whatcanbethebesttitleofthepassage?A.TheIncreasesofBlogsandWebcastsB.NewRulestoControlInternetPublishingC.TechnologiesChallengetheGovernmentD.ThePopularityofOnlineVideoBroadcasting答案及解析:1.B。主旨大意题。第一段就概括了本文的大意。2.ChinesegovernmentthinksthecurrentInternetenvironmentis______.A.quitehealthyB.lessactiveC.ratherhopefulD.lesspiloted答案及解析:2.D。由第四段可知。3.WhichofthefollowingisTRUEaccordingtothepassage?A.Publicationinstitutionsareunhappywithbloggersandwebcasters.B.Allbloggersandwebcastersliketodigoutotherpeople'sprivacy.C.Webcastersarequiteawareofthecopyrightissueswhileonline.D.Copyrightedmaterialscanonlybeofferedtoqualifiedwebsites.21\n答案及解析:3.A。由第五段可知A项正确。BTheworldeconomyhasrunintoabrickwall.Despitecountlesswarningsinrecentyearsabouttheneedtoaddressalooming(逼近)hungercrisisinpoorcountriesandaloomingenergycrisisworldwide,worldleadersfailedtothinkahead.Theresultisaglobalfoodcrisis.Wheat,cornandricepriceshavemorethandoubledinthepasttwoyears.Andoilpriceshaveincreasedmorethanthreetimessincethestavtof2004.Thesefoodpricesincreases,combinedwithsoaringenergycosts,willslowifnotstopeconomicgrowthinmanypartsoftheworldandwillevenundermine(破坏)politicalstability,asevidencedbytheprotestriotsthathaveeruptedinplaceslikeHaiti,BangladeshandBurkinaFaso.Practicalsolutionstothesegrowingwoesdoexist,butwe'llhavetostartthinkingaheadandactingglobally.So,whatshouldbedone?Herearethreestepstoeasethecurrentcrisisandavert(防止,避免)thepotentialforaglobaldisaster.Thefirstistoscaleup(按比例增加,扩大)thedramaticsuccessofMalawi,afamineprone(遭遇饥荒)countryinsouthernAfrica,whichthreeyearsagoestablishedaspecialfundtohelpitsfarmersgetfertilizerandhighyieldseeds.Malawi‘sharvestdoubledafterjustoneyear.AninternationalfundbasedontheMalawimodelwouldcostamere$10perpersonannuallyintherichworld,or$10billioninall.Second,theUSandEuropeshouldabandontheirpoliciesofsubsidizing(给补助金)theconversionoffoodintobiofuels(生物燃料).Third,weurgentlyneedtoweatherproof(使防风雨)theworld'scropsassoonandaseffectivelyaspossible.Forapoorfarmer,sometimessomethingassimpleasafarmpond—whichcollectsrainwatertobeusedforemergencyirrigationinadryspell—canmakethedifferencebetweenabountifulcropandafamine.TheworldhasalreadycommittedtoestablishingaClimateAdaptationFundtohelppoorregions,climateproofvitaleconomicactivitiessuchasfoodproductionandhealthcare,buthasnotyetacteduponthepromise.21\nThefoodcrisisprovidesnotonlyawarningbutalsoanopportunity.Weneedtoinvestvastlymoreinsustainabledevelopmentinordertoachievetrueglobalsecurityandeconomicgrowth.4.Whichofthefollowingisthebesttitle?A.HowtoEndtheGlobalFoodShortage.B.HowtoEndtheGlobalDisaster.C.HowtoHelptheFarmersinthePoorCountries.D.HowtoSubsidizetheFarmerstoIncreaseFoodProducts.答案及解析:4.A。主旨大意题。文章主要讲如何结束全球食物短缺,A能概括文章中的主要内容。B、C、D都是文章中的一部分。5.Theword“woes”inparagraphoneismostlikelytomean______.A.hungerB.thingsC.mattersD.disasters答案及解析:5.D。词义猜测题。从下文中Herearethreestepstoeasethecurrentcrisisandavert(防止,避免)thepotentialforaglobaldisaster.可以猜出词义。6.Whatdoestheauthorthinkoftheglobalfoodshortage?A.Peopleintheworldcandonothing.B.Theglobalfoodcrisiswillcontinue.C.Thefoodcrisisprovidesnotonlyawarningbutalsoanopportunity.D.Wedon'know.答案及解析:6.C。事实细节题,文中最后一段可知。7.Whatmeasuresshouldbetakentoeasethecurrentcrisisandavertthepotentialforaglobaldisaster?A.Toscale-upthedramaticsuccessofMalawi.B.TheU.S.andEuropeshouldabandontheirpoliciesofsubsidizingtheconversionoffoodintobiofuels.C.Topreventtheworld'scropsfrombeingdestroyedbyweatherassoonandaseffectivelyaspossible.D.Allabove.答案及解析:7.D。事实细节题,从文章中第二、三、四段可知。21\n21
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