人教版高中英语选择性必修第一册精品课件 Unit 5 WORKING THE LAND 分层跟踪检测(1)Reading and Thinking .ppt

ⅠⅡⅢⅣⅤWhilethediscoverywouldhelpfarmers,itwouldalsoimpactthecommercialinterestofthehybridseedindustry.Siddiq,aformerDeputyDirectorGeneralintheCropScienceDivisionoftheICAR,saidatfirstsight,thismightseemlikeasetbackforhybridseedcompaniesbuttherewouldbeplentyofthingstheycanstilldo.“Riceisgrownoversuchavastclimaticandgeographicalrangethatspecializedhybridswouldhavetobedevelopedforeachregion,”hesaid.Thecompanies,hesaid,wouldcontinuetoimprovetheirhybrids.“Itwillbeinterestingtoseehowallthisplaysoutintheyearstocome.”ⅠⅡⅢⅣⅤCurrently,thehighcostsofproducinghybridseedsareamajorbarriertofarmersindevelopingcountries,especiallySouthAsiaandAfrica.Siddiqsaidifefficientlyused,thismethodcouldpotentiallybeagame-changerforpoorfarmers,whowouldneedtopurchasehybridseedsjustonceandplanttheprogeny(后代)seedsfromtheirownharvestinthefollowingseasons.【语篇导读】本文是一篇说明文。文章主要讲述了加州大学的研究人员发现了一个方法,用种子精确克隆杂交植物,这个方法可能让贫困农民不用每年购买昂贵的杂交种子,并且保证以后每年的高产。ⅠⅡⅢⅣⅤ5.Whatproblemdotheresearchersaimtosolve?A.Farmers’income.B.Farmers’costs.C.Hybridseeds’cloning.D.Hybridseeds’climatetolerance.B解析推理判断题。根据第一段中的“Plantbiologistshavefoundawaythatmayenablepoorfarmerstodoawaywiththeneedtopurchaseexpensivehybridseedseveryyear.”可知,研究人员想要解决的问题是农民种植成本的问题。故选B项。ⅠⅡⅢⅣⅤ6.Whatisthedisadvantageofthepresenthybridseeds?A.Theyhaveaprettylonggrowthcycle.B.Theytendtobeaffectedbyvariousdiseases.C.Theyhavestricterrequirementsforsowingtime.D.Theyfailtoreproduceplantswiththesamequality.D解析细节理解题。根据第二段中的“Forlong,manycropshavebeengrownfromhigh-yielding,...cannotsavetheseedsforthenextgrowingseason.”可知,目前杂交种子的缺点是这些种子不能复制出具有相同品质的植物。故选D项。ⅠⅡⅢⅣⅤ7.What’sSiddiq’sattitudetothecommercialinterestsofthehybridseedindustry?A.Hopeful. B.Concerned.C.Doubtful. D.Anxious.A解析推理判断题。