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时间:2020-06-26
《【北师大版】2020版一轮优化探究英语练习 选修八 Unit 24 Society 含答案.doc》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、课时作业(二十九) 题型组合练——练规范(阅读理解+语法填空+短文改错+书面表达)限时:55分钟Ⅰ.阅读理解ADoPeru'spotatoeshavetherightstuff?That'sthequestionscientistswillbeaskinginLimanextmonth,whenaselectionofpotatoeswillbeginundergoingteststodeterminewhethertheyarefittogrowonMars.NASA,theUSspaceagency,i
2、sconductingthepioneeringexperimenttogetherwithLima'sInternationalPotatoCenter.TheywillcultivateahundredselectedvarietiesinMarslikeconditionsthatcouldeventuallypavethewayforbuildingadomeontheRedPlanetforfarmingthevegetable.Oftheselectedcandidates,40arenativ
3、etotheAndesMountains,conditionedtogrowindifferentecologicalzones,canstandsuddenclimatechangesandreproduceinrockyareas.Theother60areimprovedvarieties,abletosurvivewithlittlewaterandsalt.Theyarealsoimmunetoviruses.Thosethatpassthetestsmustmeetafinalcriterion
4、—theymustbeablenotonlytogrowwellonMarsbutalsoreproduceinlargequantities.“We'realmost100percentcertainthatmanyoftheselectedpotatoeswillpassthetests,”saidJulioValdiviaSilva,aPeruvianNASAastrobiologist(太空生物学家)whoistakingpartintheambitiousproject.Thescientists
5、plantotransport100kilosofsoiltoalabinLimathatwillsimulatethecomplexMartianatmosphere—whichcontainsmostlycarbondioxide—andexposeittoextremeultraviolet(紫外线的)radiation.Ifthevarietiesselectedfornextmonth'sexperimentdon'tadapttothedesertsoil,theresearcherswilli
6、ntroducenutrients,whichwillbeprovidedbyradiation.Infutureyears,NASAplanstobuildaMarsresearchcenterinthePeruviandesert.ItwouldcreateaperfectcopyoftheMartianlandscapeandatmosphereforfutureresearchintospacefarmingthatcouldservemannedmissionstoMarsandotherplan
7、etsinthesolarsystem.[语篇解读] 本文为一篇新闻报道.美国国家航空航天局(NASA)将与国际马铃薯研究中心联手,进行一项开创性实验.1.Whatisthebesttitleofthepassage?A.TransportpotatoestoPeruB.DeterminethevarietiesofpotatoesinPeruC.NASAistobuildaMarsresearchcenterinPeruD.NASAistosimulategrowingpotatoesonMarsinPe
8、ru解析:标题归纳题.通读文章可知美国国家航空航天局(NASA)计划与国际马铃薯研究中心联手,进行一项开创性实验,即在秘鲁培育可在火星上种植的土豆.故答案为D项.答案:D2.Accordingtothethirdparagraph,whichofthefollowingstatementsisTRUE?A.Fortykindsofpotatoescansurvivewithlittlewaterandsalt.B
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