2019-2020年高考英语大一轮复习Unit2Workingtheland课时作业新人教版必修(I)

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1、2019-2020年高考英语大一轮复习Unit2Workingtheland课时作业新人教版必修(I)Ⅰ.阅读理解[xx·安徽淮南二模]DoPeru'spotatoeshavetherightstuff？That'sthequestionscientistswillbeaskinginLimanextmonth，whenaselectionofpotatoeswillbeginundergoingteststodeterminewhethertheyarefittogrowonMars.NASA，theUSspaceagen

2、cy，isconductingthepioneeringexperimenttogetherwithLima'sInternationalPotatoCenter.TheywillcultivateahundredselectedvarietiesinMarslikeconditionsthatcouldeventuallypavethewayforbuildingadomeontheRedPlanetforfarmingthevegetable.Oftheselectedcandidates,40arenativetoth

3、eAndesMountains，conditionedtogrowindifferentecologicalzones，canstandsuddenclimatechangesandreproduceinrockyareas.Theother60areimprovedvarieties，abletosurvivewithlittlewaterandsalt.Theyarealsoimmunetoviruses.Thosethatpassthetestsmustmeetafinalcriterion—theymustbeabl

4、enotonlytogrowwellonMarsbutalsoreproduceinlargequantities.“We'realmost100percentcertainthatmanyoftheselectedpotatoeswillpassthetests，”saidJulioValdiviaSilva，aPeruvianNASAastrobiologist(太空生物学家)whoistakingpartintheambitiousproject.Thescientistsplantotransport100kilos

5、ofsoiltoalabinLimathatwillsimulatetheplexMartianatmosphere—whichcontainsmostlycarbondioxide—andexposeittoextremeultraviolet(紫外线的)radiation.Ifthevarietiesselectedfornextmonth'sexperimentdon'tadapttothedesertsoil，theresearcherswillintroducenutrients，whichwillbeprovid

6、edbyradiation.Infutureyears，NASAplanstobuildaMarsresearchcenterinthePeruviandesert.ItwouldcreateaperfectcopyoftheMartianlandscapeandatmosphereforfutureresearchintospacefarmingthatcouldservemannedmissionstoMarsandotherplanetsinthesolarsystem.1．Whatisthebesttitleofth

7、epassage?A．TransportpotatoestoPeru.B．DeterminethevarietiesofpotatoesinPeru.C．NASAistobuildaMarsreseachcenterinPeru.D．NASAistosimulategrowingpotatoesonMarsinPeru.2．Accordingtothethirdparagraph，whichofthefollowingstatementsisTRUE?A．Fortykindsofpotatoescansurvivewithl

8、ittlewaterandsalt.B．ManytypesofpotatoestobeplantedonMarsaredevelopedinPeru.C．SixtyvarietiesnativetotheAndesMountainscanstandsuddenclimatechanges.