GRE试题（二）_GRE
time--30minutes
25questions
question1--7
inagame,exactlysixinvertedcupsstandsidebysideinastraightline,andeachhasexactlyoneballhidden
underit.thecupsarenumberedconsecutively1through6.eachoftheballsispaintedasinglesolidcolor.
thecolorsoftheballsaregreen,magenta,orange,purple,red,andyellow.theballshavebeenhiddeny
nderthecupsinamannerthatconformstothefolowingconditions:
thepurpleballmustbehiddenunderalower-numberedcupthantheorangeball.theredballmustbehiddenunderacupimmediatelyadjacenttothec
upunder
whichthemagentaballishidden.thegreenballmustbehiddenundercup5.
1.whichofthefollowingcouldbecoloroftheballsunderthecups,inorderfrom1through6?
(a)green,yellow,magenta,red,purple,orange(b)magenta,green,purple,red,orange,yellow(c)magenta,red,purple,yellow,green,orange(d)red,purple,magenta,yellow,green,orange(e)red,purple,magenta,yellow,green,orange
2.ifthemagentaballisundercup4,theredballmustbeundercup
(a)1(b)2(c)3(d)4(e)5
3.aballofwhichoffollowingcolorscouldbeundercup6?
(a)green(b)magenta(c)purple(d)red(e)yellow
4.ifthepurpleballisundercup4,theorangeballmustbeundercup
(a)1(b)2(c)3(d)5(e)6
5.whichofthefollowingmustbetrue?
(a)thegreenballisunderalower-numberedcupthanthegreenball.b)theorangeballisunderalower-numberedcupthanthegreenball.(c)thepurpleballisunderalower-numberedcupthanthegreenball.(d)thepurpleballisunderalower-numberedcupthantheredball.(e)theredballisunderalower-numberedcupthantheyellowball.
6.iftheorangeballisundercup2,ballsofwhichofthefollowingcolorscouldbeundercupsimmediatelya
djacenttoeachother?
(a)greenandmagenta(b)greenandpurple(c)orangeandyellow(d)purpleandred(e)redandyellow
7.ifthemagentaballisundercup1,ballsofwhichofthefollowingcolorsmustbeundercupsimmediatelyadja
centtoeachother?
(a)greenandorange(b)greenandyellow(c)purpleandred(d)purpleandyellow(e)redandyellow
8.thecompanyshouldnotbeheldresponsibleforfailingtocorrectthecontrol-panelproblemthatcausedtheaccident.althoughtheproblemhadbeenmentionedearlierinasafetyinspe
ctor’sreport,companiesreceivehundredsofreportsofsuchproblem,andindustrystandardno.42requiresa
ctiononthoseproblemonlywhenanaccidentisforeseeable.
ifthesecondsentenceintheparagraphaboveisfactuallycorrect,theanswertowhichofthefollowingque
stionsismostrelevantinhelpingtodeterminewhetherornotthecompanyviolatedindustrystandardno.42w
henitfailedtocorrectthecontrol-panelproblem?
(a)wastheaccidentserious?(b)wasthecontrol-panelproblemofatypethatisknowntoincidentthatanaccidentislikely?(c)sincetheaccident,hasthecompanydoneaspecialsafetycheckonallcontrolpanels?(d)didthesafetyinspectormentionmorethanoneprobleminthesamereport?(e)howlongwasthecontrolpanelinusebeforetheproblemwasdiscovered?
9.riothamus,afifth-centurykingofthebritons,wasbetrayedbyanassociate,foughtbravelyagainstthegothsbutwasdefeated
,anddisappearedmysteriously.
riothamus,matchalmostexactlythoseattributedtokingarthur.therefore,riothamusmustbethehistoric
almodelforthelegendarykingarthur.
theargumentaboverequiresatleastoneadditionalpremise.whichofthefollowingcouldbesucharequire
dpremise?
(a)modernhistorianshavedocumentedtheactivitiesofriothamusbetterthanthoseofanyotherfifth-centuryking.(b)thestoriestoldaboutkingarthurarenotstrictlyfictitiousbutarebasedonahistoricalpersonandhistorical
events.(c)riothamus’associatesweretheauthorsoftheoriginallegendsaboutkingarthur.(d)legentsaboutthefifthcenturyusuallyembellishandromanticizetheactualconditionsofthelivesoffifth-centurynobility.(e)posterityusuallyrememberslegendsbetterthanitrememberstheactualhistoricaleventsonwhichtheyar
ebased.
10.aworldwidebanontheproductionofcertainozone-destroyingchemicalswouldprovideonlyanillusionofprotection.quantitiesofsuchchemicals,alreadyprod
uced,existascoolantsinmillionsofrefrigerators.whentheyreachtheozonelayerintheatmosphere,theirac
tioncannotbehalted.sothereisnowaytopreventthesechemicalsfromdamagingtheozonelayerfurther
.
whichofthefollowing,iftrue,mostseriouslyweakenstheargumentabove?
(a)itisimpossibletomeasurewithaccuracythequantityofozone-destroyingchemicalsthatexistascoolantsinrefrigerators.(b)inmodernsocieties,refrigerationoffoodisnecessarytopreventunhealthyandpotentiallylife-threateningconditions.(c)replacementchemicalsthatwillnotdestroyozonehavenotyetbeendevelopedandwouldbemoreexpens
ivethanthechemicalsnowusedascoolantsinrefrigerators.(d)evenifpeopleshouldgiveuptheuseofrefrigeration,thecoolantsalreadyinexistingrefrigeratorsareathrea
ttoatmosphericozone.(e)thecoolantsinrefrigeratorcanbefullyrecoveredattheendoftheusefullifeoftherefrigeratorsandreused
.
question11--15
agovernmentisassigningeachofsixembassyofficeworkers--farr,golden,hayakawa,inserra,jones,andkovacs--toembassies.therearefourembassies.embassieslandmarelocatedincountrieswithdryclimates,wher
easembassiespandtarelocatedincountrieswithhumidclimates.theofficeworkersmustbeassignedac
cordingtothefollowingrules:
eachembassymusthaveatleastoneoftheworkersassignedtoit.atleastoneembassyinahumidclimatem
usthaveatleasttwoworkersassigned
toit.goldencannotbeassignedtothesameembassyaskovacs.inserramustbeassignedtanembassyina
dryclimates.jonesmustbeassignedtoanembassyinahumidclimate.11.whichofthefollowingisanaccep
tableassignmentoftheworkerstotheembassies?
lmpt(a)farr,goldeninserra,kovacshayakawajones(b)golden,kovacsinserrajonesfarr,hayakawa(c)goldenfarr,inserrakovacsjones,hayakawa(d)jonesgolden,inserrahayakawafarr,kovacs(e)kovacsfarr,hayakawainserragolden,jones
12.whichofthefollowingmustbeassignedeithertoembassylortoembassym?
(a)farr(b)golden(c)hayakawa(d)inserra(e)kovacs
13.whichofthefollowingcannotbetrue?
(a)oneworkerisassignedtol.(b)twoworkersisassignedtop.(c)twoworkersareassignedtol.(d)threeworkersareassignedtom.(e)threeworkersareassignedtot.
14.ifgoldenandkovacsareassignedtolandm,respectively,whichofthefollowingmustbetrue?
(a)farrisassignedtoeitherport.(b)inserraisassignedtoeitherport.(c)pandteachhavetwoworkersassignedtothem.(d)hayakawaisassignedtol.(e)hayakawaisassignedtot.
15.ifgolden,hayakawa,andkovacsareamongtheworkersassignedtoembassiesinhumidclimayes,
whichofthefollowingmustbetrue?
(a)farrisassignedtoanembassytowhichnoneoftheotherfiveofficeworkersisassigned.(b)goldenisassignedtoanembassytowhichnoneoftheotherfiveofficeworkersisassigned.(c)jonesisassignedtothesameembassyasgolden.(d)hayakawaisassignedtothesameembassyasgolden.(e)hayakawaisassignedtothesameembassyaskovacs.
question16--19
avolunteerusesatrucktopickupdonationsofunsoldfoodandclothingfromstoresandtodeliverthemtoloc
ationswheretheycanbedistributed.hedrivesonlyalongacertainnetworkofroads.
inthenetworktherearetwo-wayroadsconnectingeachofthefollowingpairsofpoints:1with2,1with3,1with5,2with6,3with7,5with6,and
6with7.therearealsoone-wayroadsgoingfrom2to4,from3to2,andfrom4to3.therearenootherroadsinthenetwork,andtheroadsint
henetworkdonotintersect.
tomakeatripinvolvingpickupsanddeliverirs,thevolunteeralwaystakesaroutethatforthewholetrippasse
sthroughthefewestofthepoints1through7,countingapointtwiceifthevolunteerpassesthroughittwice
.
thevolunteer’shomeisatpoint3.donationscanbepickedupatasupermarketatpoint1,aclothingstoreatpoint5,andabak
eryatpoint4.deliveriescanbemadeasneededtoatutoringcenteratpoint2,adistributioncenteratpoint6,a
ndashelteratpoint7.
16.ifthevolunteerstartsatthesupermarketandnextistogototheshelter,thefirstintermediatepointhisrpute
passesthroughmustbe
(a)2(b)3(c)5(d)6(e)7
17.if,startingfromhome,thevolunteernextistomakepickupsfortheshelteratthesupermarketandthebake
ry(ineitherorder),thefirsttwointermediatepointsonhisroute,beginningwiththefirst,mustbe
(a)1and2(b)1and3(c)2and1(d)2and4(e)4and2
18.if,startingfromtheclothingstore,thevolunteernextistopickupbreadateitherthesupermarketorthebak
ery(whicheverstopmakeshisroutegothroughthefewestofthepoints)andthenistogototheshelter,thefirsttwopointshereachesaftertheclothingstore,beginningwiththefirst,m
ustbe
(a)1and2(b)1and3(c)4and2(d)6and2(e)6and4
19.ifthevolunteeristomakeatripstartingattheshelter,nextgoingtothebakeryforapickup,andthenending
atthedistributioncenter,thefirsttwointermediatepointsonhisroute,beginningwiththefirst,canbe
(a)3and1(b)3and4(c)4and2(d)6and2(e)6and5
question20--22
adeveloperisplanningtobuildahousingcomplexonanemptytractofland.exactlysevendifferentstylesofh
ouses--q,r,s,t,w,x,andz--willbebuildinthecomplex.thecomplexwillcontainseveralblocks,andthedeveloperplanstoputhousesofa
tleastthreedifferentstylesoneachblock.thedeveloperwillbuildthecomplexaccordingtothefollowingrule
s:
anyblockthathasstylezonitmustalsohavestylewonit.
anyblockadjacenttoonethathasonitbothstylesandstylexmusthaveonit
styletandstylez.
noblockadjacenttoonethathasonitbothstylerandstylezcanhaveonit
eitherstyletorstylew.
noblockcanhaveonitbothstylesandstyleq.
20.whichofthefollowingcanbethecompleteselectionofhousestyleonablock?
(a)q,r,s(b)q,s,x(c)r,t,z(d)s,w,z(e)t,x,z
21.whichofthefollowingcanbethecompleteselectionofhousestyleonablock?
(a)q(b)r(c)s(d)w(e)x
22.whichofthefollowingcanbethecompleteselectionofhousestylefora
blockthatisadjacenttoexactlyon
eblock,ifthatoneblockhasonitstyles,t,w,andxonly?
(a)s,t,andx(b)t,x,andz(c)r,s,x,andz(d)s,t,w,andx(e)t,w,x,andz
23.whenanosprey(afish-eatinghawk)returnafromfishingtoitsnestingareawithafishlikeanalewife,apollack,orasmelt,otherospreyswillretracei
tsflightpathinhopesofgoodfishing.thereisseldomsucharesponseifthefirstbirdbringsbackawinterfloun
der.yetospreysfeedonwinterflounderjustasreadyasodanyotherfish.
whichofthefollowing,iftrue,contributesmosttoanexplanationofthefishingbehaviorofospreysasitisdesc
ribedabove?
(a)ospreysareseldomabletocatchalewives,pollack,orsmelt.(b)alewives,pollack,andsmaltmoveinschools,butwinterflounderdonot.(c)winterflounderprefershallowerwatersthandoalewives,pollack,orsmelt.(d)winterflounderpreferandpollackexhibitprotectivecoloration,butalewivesandsmeltdonot.(e)ospreysthatliveinnestingareaareespeciallysuccessfulfishers.
24.arecentstudyofaninsurancecompany’sunderwritersindicatethatthosewhoworkedinpleasantphysicalsurroundingswere25percentmorepro
ductivethantheirpeersinunpleasantphysicalsurroundings.objectivecriteriaforevaluatingjobperform
anceincludedcaseloadandcomplexityofcases.thisshowsthatimprovingworkers’enviromentsincreasesthoseworkers’productivity.
whichofthefollowing,iftrue,mostseriouslyweakenstheconclusionabove?
(a)onaverage,less-productiveemployeesspendnofewerhoursperdayat
theirworkstationsthandotheirmore-productivepeers.(b)unpleasantsurroundingsgiveemployeeslessmotivationtoworkhardthan
morepleasantsurroundingsdo.(c)themore-productiveemployeesaregenerallyrewardedwithpleasantoffice
space.(d)more-productiveemployeesdonotworkanymorehoursthantheir
less-productivepeers.(e)peerpressurediscouragesemployeesincrowed,unpleasantsurroundings
frommakingphonecallstotheirownfamilymembersduringworktime.
25.inacertaincountry,individualtendtochangetheirpoliticalaffiliationreadilyfromonepoliticalpartyto
another.inthepasttheunionpartygrewlargerbecauseofthistendency,butalthoughmostofthosewho
changetoanewpartyaffiliationchangetotheunionparty,theunionpartyhasremainedaboutthesame
sizeinrecentyears.
whichofthefollowing,iftrue,besthelpstoexplainthechangeinthegrowthpatternoftheunionpartymen
tionedabove?
(a)theeconomyhasbeenprosperingrecently,andmanyofthosewhochange
partyaffiliationareupwardlymobileandproperous.(b)inrecentyeasthosewhowerepreviouslynonaffiliatedhavetendedtojoin
theunionpartyiftheyjoinedanypartyatall.(c)thepercentageofvoting-agecitizenswhochangepoliticalpartyaffiliation
eachyearhasremainedconstant,andthenumberofvoting-agecitizens
hasremainedthesame.(d)thepercentageofvoting-agecitizenswhoareaffiliatedwithanypolitical
partyhasincreasedoverthelasttenyears.(e)manymembersoftheunipnpartyhaveabandonedallpoliticalparty
affiliationinrecentyears.