In 1980, the cost ofp pounds of potatoes was d dollars. In 1990, the cost of 2p pounds of potatoes was d/2 dollars. By what perc

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问题 In 1980, the cost ofp pounds of potatoes was d dollars. In 1990, the cost of 2p pounds of potatoes was d/2 dollars. By what percent did the price of potatoes decrease from 1980 to 1990?

选项 A、25%
B、50%
C、75%
D、100%
E、400%

答案C

解析

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In 1980, the cost ofp pounds of potatoes was d dollars. In 1990, the cost of 2p pounds of potatoes was d/2 dollars. By what perc

GRE QUANTITATIVE

GRE

Economicdevelopmentdependsontheextractionofnaturalresourcesandonlow-skilledlabor,whichhasresultedinaweakmanuf

Ahundredyearsagoitwasassumedandscientifically"proved"byeconomiststhatthelawsofsocietymakeitnecessarytohave

Thankstothemeansofmoderntransportationandcommunication,theworldisgettingsmaller.Thewholeworldcommunityappears

Onecowardlypersoncametoamasterofmartialarts(武术)tolearnbravery.Themasterlookedathimandsaid:"Iwillteach

WhentheUnitedStatesCongresscreatedYellowstoneNationalParkin1872,thegoalwastosetasideaplacewhereAmericanscou

Sodifficult______ittoliveinanEnglish-speakingcountrythatIdeterminedtolearnEnglishwell.

IwastalkingwithaseniorPublicRelationsmanagertheotherdayaboutTheGameTrainersandheexpressedmuchdoubtaboutbot

Whatyou’realwaysheard?We’reeatingtoomuchsalt.TheaverageAmericangetsabout3.4gramsofsodiumeveryday,farmoreth

Initsearlyhistory,Chicagohadfloodsfrequently,especiallyinthespring,makingthestreetssomuddythatpeople,horses,

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