GMAT逻辑两怪之大解析.doc

文档介绍：

InPattonCity,daysarecategorizedashavingheavyrainfall(morethantwoinches),moderaterainfall(morethanoneinch,butnomorethantwoinches),lightrainfall(atleastatrace,butnomorethanoneinch),ornorainfall.In1990,therewerefewerdayswithlightrainfallthanin1910andfewerwithmoderaterainfall,yettotalrainfallfortheyearwas20percenthigherin1990thanin1910.Ifthestatementsabovearetrue,thenitisalsopossiblethatinPattonCityA.thenumberofdayswithheavyrainfallwaslowerin1990thanin1910B.thenumberofdayswithsomerainfall,butnomorethantwoinches,wasthesamein1990asin1910C.thenumberofdayswithsomerainfall,butnomorethantwoinches,washigherin1990thanin1910D.thetotalnumberofinchesofrainthatfellondayswithmoderaterainfallin1990wasmorethantwicewhatithadbeenin1910E.theaverageamountofrainfallpermonthwaslowerin1990thanin1910?已知:heavyrainfall>2inches;2>=moderaterainfall>1;0=moderaterainfall>1,即最大的中雨量不超过最小的中雨量的2倍,也就是:即便1990的中雨天每次都是最大量,而1910的中雨量每次都是最小量,那么D都不能成立。?而B与C明显与已知条件矛盾(“1990年小雨和中雨的天数都比1910少”)而E与“1990年全年的降雨量还比1910多”冲突?看来也就A有希望了;但A与我们的预估相反。但A的确是可能的,这一点人间惆怅客和其楼上的新浪网友都有很好的解释。说个最极端的情况,1990年只下了一天雨,那是一场万年不遇的亿寸豪雨,其降雨量可以远远超过1910年的天天小雨、中雨或soso大雨。一天就超过365天这有什么不可能的呢其实这题一点也不难,就是怪,思路逆向而走,在狭缝中寻找可能空间;看到这里,各位看官霎时领悟,真可谓:“忽报人间曾伏虎,泪飞顿作倾盆雨”IntheUnitedStates,ountformorethanhalfofallvisitorstowhataretechnicallycalled“pureaquariums”butforfewerthanonequarterofallvisitorstozoos,whichusuallyincludea“zooaquarium”ofrelativelymodestscope.Whichofthefollowing,iftrue,ountforthedifferencedescribedabovebetweenvisitorstozoosandvisitorstopureaquariums?(A)Incitiesthathavebothazooandapureaquarium,localresidentsaretwiceaslikelytovisittheaquariumastheyaretovisitthezoo.(B)Virtuallyalllargemetropolitanareashavezoos,wh
内容来自淘豆网转载请标明出处.