GMAT复习题难题试题及答案

GMAT复习题难题试题及答案考试时间：150分钟总分：100分姓名：__________得分：__________一、句子改错（每题4分，共20分，每题只有一项符合题意）1.UnliketheUnitedStates,wherefarmerscanusuallydependonrainorsnowallyearlong,therainsinmostpartsofKenyaareconcentratedintwodistinctseasons,sothatfarmersmuststorewaterduringthedryseasonstosurvive.（）A.UnliketheUnitedStates,wherefarmerscanusuallydependonrainorsnowallyearlong,therainsinmostpartsofKenyaareconcentratedintwodistinctseasonsB.UnliketheUnitedStatesfarmerswhocanusuallydependonrainorsnowallyearlong,therainsinmostpartsofKenyaareconcentratedintwodistinctseasonsC.UnlikethoseoftheUnitedStates,wherefarmerscanusuallydependonrainorsnowallyearlong,mostpartsofKenyahaverainsconcentratedintwodistinctseasonsD.UnliketheUnitedStates,wherefarmerscanusuallydependonrainorsnowallyearlong,mostpartsofKenyahaverainsconcentratedintwodistinctseasonsE.UnliketheUnitedStates’farmers,whocanusuallydependonrainorsnowallyearlong,Kenya’srainsareconcentratedintwodistinctseasons2.Theriseinthenumberofnewhousingstartsinthethirdquarterwasduenotonlytolowinterestratesbutalsobecausethestockmarkethadrebounded,makinghomeownersfeelmoresecureinmakinglargeinvestments.（）A.duenotonlytolowinterestratesbutalsobecauseB.duenotonlytolowinterestratesbutalsotoC.becauseofnotonlylowinterestratesbutalsobecauseD.notonlybecauseoflowinterestratesbutalsobecauseE.notonlyduetolowinterestratesbutalsobecause3.AstudyoffoodresourcesintheNorthPacificbetween1989and1996revealedthatcreaturesoftheseabedweresufferingfromdwindlingfoodsupplies,possiblyresultingfromincreasingseasurfacetemperaturesandthespreadofdestructivefishingpractices.（）A.thatcreaturesoftheseabedweresufferingfromdwindlingfoodsupplies,possiblyresultingfromincreasingB.thatcreaturesoftheseabedweresufferingbecausefoodsuppliesweredwindling,possiblyasaresultofanincreaseinC.thatcreaturesoftheseabedweresufferingfromdwindlingfoodsupplies,possiblyasaresultofincreasedD.creaturesoftheseabedthatweresufferingfromdwindlingfoodsupplies,possiblyresultingfromincreasingE.creaturesoftheseabedthatweresufferingbecausefoodsuppliesweredwindling,possiblyasaresultofanincreasein4.BythetimethefirstEuropeansettlersarrivedinNorthAmerica,morethan500distinctNativeAmericanlanguageswerealreadyspoken,manyofwhichhaddevelopedcomplexgrammaticalstructuresandextensivevocabularies.（）A.werealreadyspoken,manyofwhichhaddevelopedB.hadalreadybeenspoken,manyofwhichwouldhavedevelopedC.hadalreadybeenspoken,manyofwhichhaddevelopedD.werealreadyspoken,manyofthemdevelopingE.hadalreadybeenspoken,manyofthemdeveloping5.Thecompany’sCEOannouncedthatthefirmwouldcut10%ofitsworkforce,adecisionthatwasmetwithcriticismfromemployees,whoarguedthatthecutswereunnecessaryandthatthecompanycouldinsteadreducecostsbystreamliningoperationsratherthanbylayingoffworkers.（）A.ratherthanbylayingoffworkersB.ratherthanlayingoffworkersC.insteadoflayingoffworkersD.insteadofthelayingoffofworkersE.thanlayingoffworkers二、批判性推理（每题4分，共20分，每题只有一项符合题意）1.Aresearcherfoundthatpeoplewhoregularlydrinkgreenteahavealowerriskofdevelopingheartdiseasethanthosewhodonotdrinkgreentea.Theresearcherconcludedthatgreenteacontainscompoundsthatreducetheriskofheartdisease.Whichofthefollowing,iftrue,mostweakenstheresearcher’sconclusion?（）A.Peoplewhodrinkgreenteaalsotendtoexerciseregularlyandeatahealthydiet,bothofwhichreducetheriskofheartdisease.B.Greenteacontainscaffeine,whichhasbeenlinkedtoanincreasedriskofanxietyandinsomnia.C.Thestudyincludedonly100participants,whichisasmallsamplesize.D.Otherstudieshavefoundthatgreenteahasnosignificanteffectonheartdiseaserisk.E.Peoplewhodrinkgreenteaoftenaddsugartoit,whichincreasestheriskofheartdisease.2.Acompanyplanstoincreaseitsprofitsbyraisingthepriceofitsmainproduct.Thecompany’smarketingteamarguesthatthiswillnotleadtoasignificantlossofcustomersbecausetheproductisuniqueandhasnoclosesubstitutes.Whichofthefollowing,iftrue,moststrengthensthemarketingteam’sargument?（）A.Thecompany’sproductiscurrentlypricedlowerthanmostofitscompetitors’products.B.Surveysshowthatmostcustomersarewillingtopayupto20%morefortheproductbecauseofitsuniquefeatures.C.Thecompanyhasaloyalcustomerbasethathasbeenbuyingtheproductformanyyears.D.Thecostofproducingtheproducthasincreasedsignificantlyinrecentmonths.E.Thecompanyplanstolaunchanewadvertisingcampaigntopromotetheproductafterraisingtheprice.3.Acitycouncilproposedanewlawthatwouldbansmokinginallpublicparks.Thecouncilmembersarguethatthebanwillimprovepublichealthbyreducingexposuretosecondhandsmoke.Opponentsofthebanarguethatitisanunnecessaryrestrictiononpersonalfreedomandthatpeopleshouldbeallowedtosmokeinpublicparksiftheychooseto.Whichofthefollowing,iftrue,mostsupportsthecitycouncil’sargument?（）A.Mostpeoplewhosmokeinpublicparksdosoinareaswherechildrenarepresent.B.Thecityalreadyhasabanonsmokinginindoorpublicspaces.C.Studieshaveshownthatsecondhandsmokeexposureinpublicparkscancauserespiratoryproblemsinnon-smokers.D.Manyothercitieshaveimplementedsimilarbanswithpositiveresults.E.Thebanwillnotapplytoprivateparksoroutdoorareasofrestaurants.4.Amanufacturerofelectronicdevicesclaimsthatitsnewbatterylasts20%longerthanthebatteriesproducedbyitsmaincompetitor.Totestthisclaim,aconsumergrouptested50batteriesfromeachmanufacturer.Theresultsshowedthattheaveragelifespanofthemanufacturer’sbatterieswas10%longerthanthatofthecompetitor’sbatteries.Theconsumergroupconcludedthatthemanufacturer’sclaimisfalse.Whichofthefollowing,iftrue,mostexplainsthediscrepancybetweenthemanufacturer’sclaimandtheconsumergroup’sresults?（）A.Theconsumergrouptestedthebatteriesinadifferentenvironmentthantheoneusedbythemanufacturer.B.Themanufacturer’sbatteriesaremoreexpensivethanthecompetitor’sbatteries.C.Theconsumergroupusedasmallersamplesizethanthemanufacturerdid.D.Thecompetitor’sbatterieshaveahighercapacitythanthemanufacturer’sbatteries.E.Themanufacturer’sclaimwasbasedontestsofaprototypebattery,notthefinalproductionmodel.5.Aschooldistrictdecidedtoreplacealltraditionaltextbookswithdigitaltextbooksinanefforttoreducecostsandimprovestudentengagement.Afteroneyear,thedistrictfoundthatstudenttestscoreshadnotimprovedandthatthecostofdigitaltextbookswashigherthanexpected.Thedistrict’ssuperintendentconcludedthattheswitchtodigitaltextbookswasafailure.Whichofthefollowing,iftrue,mostweakensthesuperintendent’sconclusion?（）A.Thedistrictdidnotprovideadequatetrainingforteachersonhowtousethedigitaltextbooks.B.Studentengagementsurveysshowedasignificantincreaseinstudentinterestinlearningaftertheswitchtodigitaltextbooks.C.Thecostofdigitaltextbooksisexpectedtodecreaseinthenextfewyearsasmoredistrictsadoptthem.D.Thedistrict’stestscoreshadbeendecliningforseveralyearsbeforetheswitchtodigitaltextbooks.E.Manystudentsdidnothaveaccesstodevicestousethedigitaltextbooksathome.三、数学推理（每题4分，共20分，每题只有一项符合题意）1.Ifxandyarepositiveintegers,andx²+y²=100,whatisthemaximumpossiblevalueofx-y?（）A.2B.4C.6D.8E.102.Acontainerholdsamixtureofwaterandalcoholinaratioof3:2byvolume.If10litersofwaterareaddedtothecontainer,theratioofwatertoalcoholbecomes2:1.Whatisthetotalvolumeofthemixtureafteraddingthewater?（）A.40litersB.50litersC.60litersD.70litersE.80liters3.Foracertainproject,TeamAcancompletetheworkin12days,andTeamBcancompletetheworkin18days.IfTeamAandTeamBworktogetherfor3days,andthenTeamAleaves,howmanymoredayswillTeamBneedtocompletetheremainingwork?（）A.7.5B.9C.10.5D.12E.13.54.InacirclewithcenterO,thelengthofarcABis1/4ofthecircumferenceofthecircle.Iftheradiusofthecircleis8,whatistheareaoftriangleAOB?（）A.16B.32C.64D.128E.2565.Iftheaverage(arithmeticmean)offivenumbersis12,andtheaverageofthefirstthreenumbersis10,whatistheaverageofthelasttwonumbers?（）A.12B.14C.15D.16E.18四、阅读理解（每题4分，共20分）Passage1Theconceptof“sustainabledevelopment”hasbecomeincreasinglyimportantinrecentdecadesastheglobalpopulationgrowsandenvironmentalconcernsmount.Sustainabledevelopmentisdefinedasdevelopmentthatmeetstheneedsofthepresentwithoutcompromisingtheabilityoffuturegenerationstomeettheirownneeds.Thisconceptencompassesthreekeypillars:economicdevelopment,environmentalprotection,andsocialequity.Economicdevelopmentisessentialforreducingpovertyandimprovingthestandardoflivingforpeoplearoundtheworld.However,traditionaleconomicdevelopmentoftenreliesontheoverexploitationofnaturalresources,whichcanleadtoenvironmentaldegradation.Toachievesustainableeconomicdevelopment,countriesmustadoptpoliciesthatpromotegreengrowth,suchasinvestinginrenewableenergy,improvingenergyefficiency,andpromotingsustainableagriculture.Environmentalprotectionisanothercrucialpillarofsustainabledevelopment.Thisinvolvesprotectingnaturalresources,reducingpollution,andpreservingbiodiversity.Climatechangeisoneofthemostpressingenvironmentalchallengesfacingtheworldtoday,andaddressingitrequiresglobalcooperationtoreducegreenhousegasemissionsandadapttotheeffectsofclimatechange.Socialequityisthethirdpillarofsustainabledevelopment.Itensuresthatthebenefitsofdevelopmentaresharedequallyamongallpeople,regardlessoftheirgender,race,orsocioeconomicstatus.Thisincludesprovidingaccesstoeducation,healthcare,andbasicservicesforall,aswellaspromotinggenderequalityandreducinginequality.Whiletheconceptofsustainabledevelopmentiswidelyaccepted,implementingitremainsachallenge.Manycountriesstruggletobalanceeconomicgrowthwithenvironmentalprotectionandsocialequity.However,withincreasedglobalcooperationandinnovativepolicies,itispossibletoachievesustainabledevelopmentandcreateabetterfutureforall.1.Accordingtothepassage,whichofthefollowingisNOToneofthekeypillarsofsustainabledevelopment?（）A.EconomicdevelopmentB.EnvironmentalprotectionC.SocialequityD.Technologicalinnovation2.Theauthorarguesthattraditionaleconomicdevelopmentisproblematicbecauseit（）A.doesnotfocusonreducingpovertyB.reliesonoverexploitationofnaturalresourcesC.ignoressocialequityD.isnotsupportedbyglobalcooperation3.Whatdoesthepassagesuggestaboutclimatechange?（）A.Itisaminorenvironmentalchallenge.B.Itcanbeaddressedwithoutglobalcooperation.C.Itrequiresreducinggreenhousegasemissions.D.Ithasnoimpactonsustainabledevelopment.Passage2Theriseofartificialintelligence(AI)hastransformedmanyindustries,fromhealthcaretofinancetotransportation.AIreferstotheabilityofmachinestoperformtasksthattypicallyrequirehumanintelligence,suchasvisualperception,speechrecognition,decision-making,andlanguagetranslation.WhileAIoffersmanybenefits,italsoraisesimportantethicalandsocialquestions.OneofthemainbenefitsofAIisitsabilitytoincreaseefficiencyandproductivity.Inhealthcare,AI-poweredtoolscanhelpdoctorsdiagnosediseasesmoreaccuratelyandquickly,leadingtobetterpatientoutcomes.Infinance,AIalgorithmscananalyzelargeamountsofdatatoidentifytrendsandmakeinvestmentdecisions.Intransportation,self-drivingcarshavethepotentialtoreducetrafficaccidentsandimprovemobility.However,AIalsoposesseveralchallenges.OnemajorconcernistheimpactofAIonemployment.AsAIbecomesmoreadvanced,itmayreplacehumanworkersinmanyjobs,leadingtojoblossandeconomicinequality.AnotherconcernistheethicalimplicationsofAIdecision-making.AIalgorithmsaretrainedonlargedatasets,whichmaycontainbiases.Thiscanleadtounfairdecisions,suchasdiscriminationinhiringorlending.Additionally,thereareconcernsaboutprivacyandsecurity.AIsystemscollectandanalyzelargeamountsofpersonaldata,whichcanbevulnerabletohackingandmisuse.ThereisalsotheriskthatAIcouldbeusedformaliciouspurposes,suchascyberattacksorthedevelopmentofautonomousweapons.Toaddressthesechallenges,governments,businesses,andresearchersmustworktogethertodevelopethicalguidelinesandregulationsforAI.ThisincludesensuringthatAIsystemsaretransparent,fair,andsecure,andthatthebenefitsofAIaresharedequitably.4.Accordingtothepassage,whichofthefollowingisabenefitofAI?（）A.ReducingjobopportunitiesB.ImprovingdiagnosticaccuracyinhealthcareC.IncreasingprivacyrisksD.Promotingeconomicinequality5.TheauthorsuggeststhattoaddressthechallengesposedbyAI,itisnecessaryto（）A.banthedevelopmentofAIB.relysolelyonbusinessestoregulateAIC.developethicalguidelinesandregulationsD.ignoretheethicalimplicationsofAI五、分析性写作（共20分）ThefollowingappearedinamemofromtheCEOofaretailcompany:“Ourcompany’ssaleshavedeclinedby15%overthepastyear.Toreversethistrend,weshouldfocusonexpandingouronlinepresence.Studiesshowthatmoreandmoreconsumersareshoppingonline,andcompanieswithstrongonlineplatformshaveseenasignificantincreaseinsales.Byinvestinginourwebsite,launchingamobileapp,andincreasingoursocialmediamarketing,wecanattractmoreonlinecustomersandboostoursales.Additionally,weshouldreduceourinvestmentinphysicalstores,astheyarebecominglesspopularamongconsumers.”Writearesponseinwhichyoudiscusswhatspecificevidenceisneededtoevaluatetheargumentandexplainhowtheevidencewouldweakenorstrengthentheargument.（要求：300-400字，逻辑清晰，论证充分）参考答案一、句子改错（每题4分，共20分）1.D2.B3.C4.C5.A二、批判性推理（每题4分，共20分）1.A2.B3.C4.E5.A三、数学推理（每题4分，共20分）1.D2.C3.C4.B5.C四、阅读理解（每题4分，共20分）1.D2.B3.C4.B5.C五、分析性写作（共20分）SampleResponse:TheCEO’sargumentthatexpandingonlinepresenceandreducingphysicalstoreinvestmentwillreversethe