GRE出国考试模拟试题20.docx

GRE出国考试模拟试题20.docx

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GRE出国考试模拟试题20

GRE出国考试模拟试题20

GRE出国考试模拟试题20GRE出国考试模拟试题20section6

time30minutes

25questions

1.joyce:

threeyearsagothetrafficcommission

modifiedourtown'sbusiestintersectionfor

bettervisibility,acommendableefforttocut

downontrafficaccidentsthere.

gary:

overthepastthreeyearstherehavebeen

more,notfewer,trafficaccidentsperweekat

thatintersection,sothemodificationhas

increasedthelikelihoodofaccidentsthere

theanswertowhichofthefollowingquestions

wouldbemostusefulinevaluatinggary'sargument?

（a）whatproportionofthetown'sdriversinvolved

inaccidentsthatoccurredpriortothe

modificationsufferedpersonalinjuryintheir

accidents?

（b）howlong,onaverage,hadthemembersofthe

trafficcommissionheldtheirofficeswhenthe

modificationwasimplemented?

（c）doamajorityofthetown'sresidentsapproveof

thetrafficcommission'soverallperformance?

（d）whatmeasureshavenearbytownstakenwithin

thelastthreeyearsinordertoimprovevisibil-

ityatdangerousintersections?

（e）howhasthevolumeoftrafficatthetown's

busiestintersectionchangedoverthelastthree

years?

2.womenmakeupthemajorityofthepopulationinthe

country,andmanyoftheprescriptionswrittenby

doctorsfortranquilizersareforwomenpatients.the

testingofthesedrugsforefficacyandthecalibration

ofrecommendeddoses,however,wasdoneonlyon

men.noteventheanimalsusedtotesttoxicitywere

female.

thestatementsabove,iftrue,bestsupportwhichof

thefollowingasaconclusion?

（a）sometranquilizersaremoreappropriatelypre-

scribedforwomenthanformen.

（b）therehavebeennoreportsofnegativeside

effectsfromprescribedtranquilizersinwomen

（c）tranquilizersareprescribedforpatientsinsome

instanceswhendoctorsdonotfeelconfidentof

theirdiagnoses.

（d）thetoxicityofdrugstowomenislessthanthe

toxicityofthesamedrugstomen.

（e）whethertherecommendeddosagesoftranquil-

izersareoptimalforwomenisnotknown.

questions3-8

alandscapedesignerhasavailabletwotreeseachofeightdifferentspecies

linden,maple,pine,quince,redbud,spruce,tupelo,andwalnutfromwhich

aselectionmustbemadeforplantingattwodifferentlocations.forplanting

ateachlocation,thedesignerwillselectexactlyfourtrees,representingfour

differenttreespecies,accordingtothefollowingconditions:

ifquinceisplantedatlocation1,sprucecannotbeplantedatlocation2.

iflindenandquinceareplantedatlocation1,pinemustbeplanted

atlocation2.

ifpineisplantedatlocation2,quinceandtupelomustbeplanted

atlocation1.

sprucecannotbeplantedatlocation1unlesslindenandpineareplanted

atlocation2.

3.whichofthefollowingisanacceptableselectionofspeciestobeplanted

atthetwolocations?

location1location2

（a）linden,maple,pine,quincemaple,pine,tupelo,walnut

（b）linden,pine,quince,walnutlinden,maple,tupelo,walnut

（c）maple,quince,spruce,tupelomaple,pine,tupelo,walnut

（d）quince,spruce,tupelo,walnutlinden,maple,pine,tupelo

（e）quince,spruce,tupelo,walnutlinden,pine,quince,spruce

4.ifmaple,spruce,andtupeloareplantedatlocation1,

thenwhichofthefollowingmustbetheotherspecies

plantedatlocation1?

（a）quince

（b）redbud

（c）spruce

（d）tupelo

（e）walnut

5.ifmaple,redbud,andwalnutareplantedatlocation1,

thenanyofthefollowingspeciescanbeplantedat

location2except

（a）linden

（b）pine

（c）quince

（d）tupelo

（e）walnut

6.iflindenandquinceareplantedatlocation1,then

whichofthefollowingmustbetrue?

（a）quinceisplantedatlocation2.

（b）spruceisplantedatlocation2.

（c）pineisnotplantedatlocation1.

（d）spruceisnotplantedatlocation1.

（e）tupeloisplantedatlocation1.

7.ifeachoftheeightspeciesisselectedforplanting

andspruceisplantedatlocation2,thenwhichof

thefollowingmustalsobeplantedatlocation2?

（a）linden

（b）pine

（c）quince

（d）tupelo

（e）walnut

8.ifeachoftheeightspeciesmustbeselectedforplant-

ingandquinceandtupeloareplantedatlocation1,

thenwhichofthefollowingcanbetheothertwo

speciesplantedatlocation1?

（a）mapleandspruce

（b）mapleandwalnut

（c）pineandredbud

（d）pineandspruce

（e）redbudandwalnut

9.graywolveshavebeenabsentfromalargenational

parkfordecades.parkofficialswishtoreestablish

thewolveswithoutjeopardizinganyexistingspecies

ofwildlifethere.sincetheparkcontainsadequate

preyforthewolvesandsincethewolvesavoidclose

contactwithpeople,reintroducingthemwouldserve

theofficials'purposewithoutseriouslyjeopardizing

visitors'safety.

eachofthefollowing,iftrue,strengthensthe

argumentaboveexcept:

（a）theparkissolargethatwolveswillnotneedto

ventureintoareasfrequentedbypeople.

（b）rabiesisveryrareinwolves,andtherehave

beennoverifiedcasesofserioushumaninjuries

fromnonrabidwildwolvessincerecordshave

beenkept.

（c）ranchersintheregionneartheparkhave

expressedconcernthatgraywolves,ifreintro-

duced,wouldsometimespreyontheirlivestock.

（d）predationbygraywolvesonelkintheparkis

likelytoimprovethehealthandviabilityofthe

park'selkpopulationasawholebyreducing

malnutritionamongtheelk.

（e）wolvesdonotpreyonanimalsofanyendangered

speciesthatcurrentlyinhabitthepark.

10.osteoporosisisadiseasethatreducesbonemass,lead-

ingtofragilebonesthatbreakeasily.currenttreat-

mentsforosteoporosissuchasestrogenorcalcitonin

helppreventfurtherlossofbonebutdonotincrease

bonemass.sincefluorideisknowntoincreasebone

mass,administeringfluoridetoosteoporosispatients

wouldthereforehelpmaketheirboneslesssusceptible

tobreaking.

whichofthefollowing,iftrue,mostseriously

weakenstheargumentabove?

（a）mostpeoplewhosufferfromosteoporosisare

notawarethatadministrationoffluoridecan

increasebonemass.

（b）fluorideisaddedtodrinkingwaterinmany

locationsinordertostrengthentheteethof

peoplewhodrinkthewater.

（c）theriskofcontractingosteoporosisandother

degenerativebonediseasesislessenedbyexer-

ciseandanadequateintakeofcalcium.

（d）unlikeadministrationoffluoride,administration

ofestrogenorcalcitoninisknowntocause

undesirablesideeffectsformanypeople.

（e）thenewbonemassthatisaddedbytheadmin-

istrationoffluorideismorebrittleandless

elasticthannormalbonetissue.

11.theclosestdistancefromwhichanasteroidhasbeen

photographedusingground-basedradaris2.2million

miles,thedistancefromwhichtheasteroidtoutatis

wasrecentlyphotographed.theclosestphotographof

anasteroidisofgaspra,whichwasphotographed

fromadistanceofonly10,000miles.

whichofthefollowingcanbeproperlyconcluded

fromthestatementsabove?

（a）toutatisismorelikelytocollidewiththeearth

thangasprais.

（b）toutatis,unlikegaspra,hasonlyrecentlybeen

discovered.

（c）asteroidscanbephotographedonlybyusing

ground-basedradar.

（d）ground-basedradarphotographycannottake

photographsofobjectsmuchbeyond2.2million

milesfromearth.

（e）thephotographofgasprawasnottakenusing

ground-basedradar.

12.whichofthefollowingmostlogicallycompletesthe

argumentbelow?

aloneamonglivingspecies,humanbeingsexperience

adolescence,aperiodofacceleratedphysicalgrowth

priortofullmaturity.whetherotherhominidspecies,

whicharenowallextinctandareknownonlythrough

thefossilrecord,wentthroughadolescencecannotbe

known,since

（a）theminimumaccelerationinphysicalgrowth

thatwouldindicateadolescencemightdiffer

accordingtospecies

（b）thefossilrecord,thoughsteadilyexpanding,will

alwaysremainincomplete

（c）detectingtheadolescentgrowthspurtrequires

measurementsonthesameindividualatdiffer-

entages

（d）completeskeletonsofextincthominidsare

extremelyrare

（e）humanbeingsmightbethefirstspeciestobene-

fitfromthesurvivaladvantages,ifany,con-

ferredbyadolescence

questions13-17

acircusmagicianhasa"magicbox"thathasexactlysix

chambersdesignedtoholdatleasttwoanimalseach.there

arefivetrainedanimalsafrog,ahen,amouse,apara-

keet,andarabbit.onthefrontofthebox,chambers1,2,

and3arearrangedinastraightlinesothatchamber1is

directlyadjacenttochamber2,andchamber2isdirectly

adjacenttochamber3.onthebackofthebox,thecham-

bersarealsoarrangedinastraightlinewithchamber4

directlyadjacenttochamber5,andchamber5directly

adjacenttochamber6.nochamberinthefrontofthe

boxisdirectlyadjacenttoachamberintheback.

whenworkingwiththeanimals,themagicianmustobey

thefollowingrestrictions:

noneofthechamberscancontainmorethantwo

animalsatthesametime.

themousecannotbeinthesamechamberasany

otheranimal,andanychamberdirectlyadjacentto

thechamberthatthemouseoccupiesmustremain

empty.

neitherthehennorthefrogcanbeinthesame

chamberastheparakeet.

13.ifthemouseisinchamber2,andtheotherfour

animalsareallinchambers,whichofthefollowingis

apairofchambersthatmustbeempty?

（a）1and3

（b）1and4

（c）2and4

（d）3and5

（e）3and6

14.ifthemouseinchamber2,theparakeetisin

chamber4,andalltheotheranimalsareinchambers,

thenthehencanbeinchamber.

（a）1

（b）2

（c）