Unit2WorkingthelandⅠ.阅读理解[2017·安徽淮南二模]DoPeru'spotatoeshavetherightstuff？That'sthequestionscientistswillbeaskinginLimanextmonth，whenaselectionofpotatoeswillbeginundergoingteststodeterminewhethertheyarefittogrowonMars.NASA，theUSspaceagency，isconductingthepioneeringexperimenttogetherwithLima'sInternationalPotatoCenter.TheywillcultivateahundredselectedvarietiesinMarslikeconditionsthatcouldeventuallypavethewayforbuildingadomeontheRedPlanetforfarmingthevegetable.Oftheselectedcandidates,40arenativetotheAndesMountains，conditionedtogrowindifferentecologicalzones，canstandsuddenclimatechangesandreproduceinrockyareas.Theother60areimprovedvarieties，abletosurvivewithlittlewaterandsalt.Theyarealsoimmunetoviruses.Thosethatpassthetestsmustmeetafinalcriterion—theymustbeablenotonlytogrowwellonMarsbutalsoreproduceinlargequantities.“We'realmost100percentcertainthatmanyoftheselectedpotatoeswillpassthetests”，saidJulioValdiviaSilva，aPeruvianNASAastrobiologist(太空生物学家)whoistakingpartintheambitiousproject.Thescientistsplantotransport100kilosofsoiltoalabinLimathatwillsimulatethecomplexMartianatmosphere—whichcontainsmostlycarbondioxide—andexposeittoextremeultraviolet(紫外线的)radiation.Ifthevarietiesselectedfornextmonth'sexperimentdon'tadapttothedesertsoil，theresearcherswillintroducenutrients，whichwillbeprovidedbyradiation.Infutureyears，NASAplanstobuildaMarsresearchcenterinthePeruviandesert.ItwouldcreateaperfectcopyoftheMartianlandscapeandatmosphereforfutureresearchintospacefarmingthatcouldservemannedmissionstoMarsandotherplanetsinthesolarsystem.1．Whatisthebesttitleofthepassage?A．TransportpotatoestoPeru.B．DeterminethevarietiesofpotatoesinPeru.C．NASAistobuildaMarsreseachcenterinPeru.D．NASAistosimulategrowingpotatoesonMarsinPeru.2．Accordingtothethirdparagraph，whichofthefollowingstatementsisTRUE?A．Fortykindsofpotatoescansurvivewithlittlewaterandsalt.B．ManytypesofpotatoestobeplantedonMarsaredevelopedinPeru.C．SixtyvarietiesnativetotheAndesMountainscanstandsuddenclimatechanges.D．Thefinalcriterionisthatallthecandidatesareimmunetovirusesontheearth.3．Whatiftheselectedvarietiesdon'tadapttothedesertsoilinPeru?A．Astrobiologistswillbesenttheretohelp.B．Nutrientswillbeprovidedtoplantsbyradiation.C．AMarsresearchcenterwillbebuiltforfurtherstudy.D．100morekilosofpotatoeswillbedirectlysenttoLima.4．Thepassagemaybeinthe________columnofChinaDaily.A．scienceB．sportsC．tourismD．entertainment答案：[解题导语]本文为新闻报道。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．D解析：主旨大意题。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。2．B解析：事实细节题。根据第三段第一句TheywillcultivateahundredselectedvarietiesinMarslikeconditionsthatcouldeventuallypavethewayforbuildingadomeontheRedPlanetforfarmingthevegetable.可知B项正确。根据第三段中的Theother60areimprovedvarieties，abletosurvivewithlittlewaterandsalt.可排除A项；根据第三段中的Oftheselectedcandidates.40arenativetotheAndesMountains，conditionedtogrowindifferentecologicalzones,canstandsuddenclimatechangesandreproduceinrockyareas.可排除C项；根据第三段中的Thosethatpassthetestsmustmeetafinalcriterion－theymustbeablenotonlytogrowwellonMarsbutalsoreproduceinlargequantities.可排除D项。3．B解析：事实细节题。根据第...
