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1、专业GMAT与托福保分机构雷哥GMAT备考宝典之真题解析3【原创】真题训练：Whichofthefollowingmostlogicallycompletestheargumentbelow?DavisonRiverfarmersarecurrentlydecidingbetweenplantingwinterwheatthisfallorspringwheatnextspring.Winterwheatandspringwheatareusuallyaboutequallyprofitable.Becauseofnewgovernment
2、restrictionsontheuseofDavisonRiverwaterforirrigation,peracreyieldsforwinterwheat,thoughnotforspringwheat,wouldbemuchlowerthanaverage.Therefore,plantingspringwheatwillbemoreprofitablethanplantingwinterwheat,since.(A)thesmaller-than-averagesizeofawinterwheatharvestthisyearwo
3、uldnotbecompensatedforbyhigherwinterwheatprices(B)newcropsofspringwheatmustbeplantedearlierthanthetimeatwhichstandingcropsofwinterwheatarereadytobeharvested(C)thespringwheatthatfarmersintheDavisonRiverregionplantiswelladaptedtothesoiloftheregion(D)springwheathasusesthatare
4、differentfromthoseofwinterwheat(E)plantingspringwheatismoreprofitablethanplantingcertainothercrops,suchasrye分析：原文：政府对灌溉用水的限制--冬小麦每英亩产量减小---冬小麦和春小麦的选择问题：春小麦利润高的理由。解题关键：原文谈钱，选项谈钱更有关。选项：A，冬小麦高价不能补偿冬小麦收获的减少；潜台词：冬小麦利润减少，小于春小麦。有关B，春小麦的种植必须早于冬小麦的收割；种植时间，无关。C，春小麦更适合土壤；无关。D，春小麦的作用与
5、冬小麦不同，无关。E，种春小麦比其他庄稼利润高。无关比较。答案：A。真题训练2：Whenthereislessrainfallthannormal,thewaterlevelofAustralianriversfallsandtheriversflowmoreslowly.Becausealgaewhosehabitatisriverwatergrowbestinslow-movingwater,theamountofalgaeperunitofwatergenerallyincreaseswhentherehasbeenlittlerai
6、n.By专业GMAT与托福保分机构contrast,however,followingaperiodofextremedrought,algaelevelsareloweveninveryslow-movingriverwater.Whichofthefollowing,iftrue,doesmosttoexplainthecontrastdescribedabove?(A)Duringperiodsofextremedrought,thepopulationsofsomeofthespeciesthatfeedonalgaetendtof
7、all.(B)Themoreslowlywatermoves,themoreconduciveitstemperatureistothegrowthofalgae.(C)Whenalgaepopulationsreachveryhighlevels,conditionswithintherivercanbecometoxicforsomeoftheotherspeciesthatnormallylivethere.(D)Australianriversdryupcompletelyforshortintervalsinperiodsofex
8、tremedrought.(E)Exceptduringperiodsofextremedrought,algaelevelstendtobehigherinriversinwh
