（课标通用）2018版高考英语大一轮复习 unit 2 working the land课时作业 新人教版必修4

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1、Unit2WorkingthelandⅠ.阅读理解[2017·安徽淮南二模]DoPeru'spotatoeshavetherightstuff？That'sthequestionscientistswillbeaskinginLimanextmonth，whenaselectionofpotatoeswillbeginundergoingteststodeterminewhethertheyarefittogrowonMars.NASA，theUSspaceagency，isconductingthepioneeringexperimenttoget

2、herwithLima'sInternationalPotatoCenter.TheywillcultivateahundredselectedvarietiesinMarslikeconditionsthatcouldeventuallypavethewayforbuildingadomeontheRedPlanetforfarmingthevegetable.Oftheselectedcandidates,40arenativetotheAndesMountains，conditionedtogrowindifferentecologicalzo

3、nes，canstandsuddenclimatechangesandreproduceinrockyareas.Theother60areimprovedvarieties，abletosurvivewithlittlewaterandsalt.Theyarealsoimmunetoviruses.Thosethatpassthetestsmustmeetafinalcriterion—theymustbeablenotonlytogrowwellonMarsbutalsoreproduceinlargequantities.“We'realmos

4、t100percentcertainthatmanyoftheselectedpotatoeswillpassthetests，”saidJulioValdiviaSilva，aPeruvianNASAastrobiologist(太空生物学家)whoistakingpartintheambitiousproject.Thescientistsplantotransport100kilosofsoiltoalabinLimathatwillsimulatethecomplexMartianatmosphere—whichcontainsmostlyc

5、arbondioxide—andexposeittoextremeultraviolet(紫外线的)radiation.Ifthevarietiesselectedfornextmonth'sexperimentdon'tadapttothedesertsoil，theresearcherswillintroducenutrients，whichwillbeprovidedbyradiation.Infutureyears，NASAplanstobuildaMarsresearchcenterinthePeruviandesert.Itwouldcr

6、eateaperfectcopyoftheMartianlandscapeandatmosphereforfutureresearchintospacefarmingthatcouldservemannedmissionstoMarsandotherplanetsinthesolarsystem.1．Whatisthebesttitleofthepassage?A．TransportpotatoestoPeru.B．DeterminethevarietiesofpotatoesinPeru.C．NASAistobuildaMarsreseachcen

7、terinPeru.D．NASAistosimulategrowingpotatoesonMarsinPeru.2．Accordingtothethirdparagraph，whichofthefollowingstatementsisTRUE?A．Fortykindsofpotatoescansurvivewithlittlewaterandsalt.B．ManytypesofpotatoestobeplantedonMarsaredevelopedinPeru.C．SixtyvarietiesnativetotheAndesMountainsca

8、nstandsuddenclimatechanges.D．Thefinalcriterionisthatal