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时间:2019-04-23
《课标通用2018版高考英语复习unit2workingtheland课时作业新人教版》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、Unit2WorkingthelandⅠ.阅读理解[2017·安徽淮南二模]DoPeru'spotatoeshavetherightstuff?That'sthequestionscientistswillbeaskinginLimanextmonth,whenaselectionofpotatoeswillbeginundergoingteststodeterminewhethertheyarefittogrowonMars.NASA,theUSspaceagency,isconductingthepioneeringexp
2、erimenttogetherwithLima'sInternationalPotatoCenter.TheywillcultivateahundredselectedvarietiesinMarslikeconditionsthatcouldeventuallypavethewayforbuildingadomeontheRedPlanetforfarmingthevegetable.Oftheselectedcandidates,40arenativetotheAndesMountains,conditionedtogro
3、windifferentecologicalzones,canstandsuddenclimatechangesandreproduceinrockyareas.Theother60areimprovedvarieties,abletosurvivewithlittlewaterandsalt.Theyarealsoimmunetoviruses.Thosethatpassthetestsmustmeetafinalcriterion—theymustbeablenotonlytogrowwellonMarsbutalsore
4、produceinlargequantities.“We'realmost100percentcertainthatmanyoftheselectedpotatoeswillpassthetests,”saidJulioValdiviaSilva,aPeruvianNASAastrobiologist(太空生物学家)whoistakingpartintheambitiousproject.Thescientistsplantotransport100kilosofsoiltoalabinLimathatwillsimulate
5、thecomplexMartianatmosphere—whichcontainsmostlycarbondioxide—andexposeittoextremeultraviolet(紫外线的)radiation.Ifthevarietiesselectedfornextmonth'sexperimentdon'tadapttothedesertsoil,theresearcherswillintroducenutrients,whichwillbeprovidedbyradiation.Infutureyears,NASA
6、planstobuildaMarsresearchcenterinthePeruviandesert.ItwouldcreateaperfectcopyoftheMartianlandscapeandatmosphereforfutureresearchintospacefarmingthatcouldservemannedmissionstoMarsandotherplanetsinthesolarsystem.1.Whatisthebesttitleofthepassage?A.TransportpotatoestoPer
7、u.B.DeterminethevarietiesofpotatoesinPeru.C.NASAistobuildaMarsreseachcenterinPeru.D.NASAistosimulategrowingpotatoesonMarsinPeru.2.Accordingtothethirdparagraph,whichofthefollowingstatementsisTRUE?A.Fortykindsofpotatoescansurvivewithlittlewaterandsalt.6B.Manytypesofpo
8、tatoestobeplantedonMarsaredevelopedinPeru.C.SixtyvarietiesnativetotheAndesMountainscanstandsuddenclimatechanges.D.Thefinalcriterionisthata
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