2006年gmat考试逻辑模拟试题四

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1、2006年GMAT考试最新逻辑模拟试题四11.Installingscrubbersinsmokestacksandswitchingtocleaner-burningfuelarethetwomethodsavailabletoNorthernPowerforreducingharmfulemissionsfromitsplants.Scrubberswillreduceharmfulemissionsmorethancleaner-burningfuelswill.Therefore,byinstallin

2、gscrubbers,NorthernPowerwillbedoingthemostthatcanbedonetoreduceharmfulemissionsfromitsplants.Whichofthefollowingisanassumptiononwhichtheargumentdepends?(A)Switchingtocleaner-burningfuelwillnotbemoreexpensivethaninstallingscrubbers.(B)NorthernPowercanchoosefr

3、omamongvariouskindsofscrubberssomeofwhicharemoreeffectivethanothers・(C)NorthernPowerisnotnecessarilycommittedtoreducingharmfulemissionsfromitsplants.(D)HarmfulemissionsfromNorthernPowersplantscannotbereducedmorebyusingbothmethodstogetherthanbytheinstallation

4、ofscrubbersalone.(E)Asidefromharmfulemissionsfromthesmoke-stacksofitsplants,theactivitiesofNorthernPowerdonotcausesignificantairpollution.12.In1990allofthepeoplewhoappliedforajobatEvcoalsoappliedforajobatRadeco,andEvcoandRadecoeachofferedjobstohalfoftheseapp

5、licantscants・Therefore,everyoneoftheseapplicantsmusthavebeenofferedajobin1990・Theargumentaboveisbasedonwhichofthefollowingassumptionsaboutthesejobapplicants?(A)AlloftheapplicantswereverywellqualifiedforajobateitherEvcoorRadeco.(B)Alloftheapplicantsacceptedaj

6、obateitherEvcoorRadeco.(C)NoneoftheapplicantswasofferedajobbybothEvcoandRadeco.(D)NoneoftheapplicantshadappliedforjobsatplacesotherthanEvcoandRadeco.(E)NoneoftheapplicantshadperviouslyworkedforeitherEvcoorRadeco13-YhasbeenbelievedtocauseZ.Anewreport,notingth

7、atYandZareoftenobservedtobeprecededbyX，suggeststhatX，notY,maybethecauseofZ.Whichofthefollowingfurtherobservationswouldbestsupportthenewreport'ssuggestion?(A)IncaseswhereXoccursbutYdoesnot,XisusuallyfollowedbyZ・(B)IncaseswhereXoccurs,followedbyY,Yisusuallyfol

8、lowedbyZ.(C)IncaseswhereYoccursbutXdoesnot.YisusuallyfollowedbyZ.(D)IncaseswhereYoccursbutZdoesnot,YisusuallyprecededbyX.(E)IncaseswhereZoccurs,itisusuallyprecededbyXandY.14.Acost-effectivesolut