2025年英语四六级完形填空解题技巧试卷：下半学期备考宝典

2025年英语四六级完形填空解题技巧试卷：下半学期备考宝典考试时间：______分钟总分：______分姓名：______第一部分完形填空Directions:Readthefollowingpassagecarefullyandchoosethebestword(orwords)foreachblankfromthefourchoicesgiven.MarkthecorrespondingletteronAnswerSheet2withasinglelinethroughthecentre.Thehumanbrainisincrediblycomplex,butresearchershavemadesignificantstridesinunderstandingitsbasicfunctions.Neurons,thebuildingblocksofthebrain,communicatewitheachotherthroughelectricalandchemicalsignals.Thiscommunicationnetworkallowsustothink,feel,move,andperceivetheworldaroundus.Understandinghowtheseneurons1)______iscrucialforunravelingthemysteriesofthebrain.Onekeyaspectofneuronalcommunicationisthesynapse,atinyjunctionwheresignalsaretransmitted.Whenanelectricalsignal,knownasanactionpotential,reachestheendofaneuron,ittriggersthereleaseofchemicalmessengerscalledneurotransmitters.Theseneurotransmitterscrossthesynapticgapandbindtoreceptorsonthereceivingneuron.Thisbindingcaneitherexciteorinhibitthereceivingneuron,dependingonthetypeofneurotransmitterandreceptorinvolved.Theprocessisincredibly2)______,withmillionsofneuronsfiringandcommunicatingsimultaneously.However,thebrain'sfunctionisnotjustaboutindividualneuronsfiring;itisaboutthecoordinatedactivityofvastnetworksofneurons.Thesenetworkscanbethoughtofascircuitsthatprocessinformationandgiverisetocomplexbehaviorsandcognitivefunctions.Forexample,theprefrontalcortex,aregionofthebraininvolvedindecision-makingandplanning,reliesontheintricate3)______ofmultipleneuronstoperformitsfunctionseffectively.Studieshaveshownthatdisruptionsintheseneuralnetworkscanleadtovariouscognitiveimpairments,highlightingtheimportanceoftheirproperfunctioning.Recentadvancementsinneurotechnologyhaveallowedresearcherstovisualizetheseneuralnetworksinunprecedenteddetail.Techniquessuchasfunctionalmagneticresonanceimaging(fMRI)andelectroencephalography(EEG)enablescientiststoobservebrainactivityinreal-time.Thesetoolshaveprovidedvaluableinsightsintohowdifferentbrainregionsworktogethertoproducethoughts,emotions,andactions.Byunderstandingthesecomplexinteractions,researchershopetodevelopmoreeffectivetreatmentsforneurologicalandpsychiatricdisorders.Despitetheseadvancements,muchremainstobelearnedaboutthebrain.Thesheercomplexityofneuronalcommunicationandnetworkdynamicsmakesitachallengingbutfascinatingfieldofstudy.Asourunderstandingcontinuestogrow,wemayunlocknewinsightsintothehumanmindanddevelopinnovativestrategiestoenhancebrainhealthandfunction.1.A.interactB.connectC.operateD.function2.A.rapidB.regularC.randomD.reliable3.A.integrationB.separationC.coordinationD.interactionTheglobalclimatecrisisposesanunprecedentedchallengetohumanity,requiringurgentandcollectiveaction.Risingglobaltemperatures,primarilydrivenbyhumanactivitiessuchasburningfossilfuelsanddeforestation,haveledtonumerousadverseeffectsontheenvironment.Oneofthemostvisibleimpactsisthemeltingofpolaricecapsandglaciers,whichcontributestosea-levelrise.Thisrisethreatenscoastalcommunitiesandlow-lyingareas,potentiallydisplacingmillionsofpeopleandcausingsignificanteconomicdamage.Anotherconsequenceofglobalwarmingistheincreasedfrequencyandintensityofextremeweatherevents.Heatwaves,droughts,floods,andhurricanesarebecomingmorecommon,devastatingecosystemsandimpactinghumanlivelihoods.Theseeventsnotonlycauseimmediatelossoflifeandpropertybutalsohavelong-termenvironmentalandeconomicrepercussions.Forinstance,prolongeddroughtscanleadtocropfailuresandwaterscarcity,whilefloodscandestroyhabitatsandcontaminatewatersources.Biodiversityisalsofacingaseverethreatduetoclimatechange.Manyspeciesareunabletoadaptquicklyenoughtochangingconditions,leadingtopopulationdeclinesandevenextinction.Habitatsarebeingalteredordestroyed,furtherexacerbatingtheproblem.Thelossofbiodiversityhascascadingeffectsonecosystems,disruptingnaturalprocessesandreducingtheirabilitytoprovideessentialservices,suchaspollinationandwaterpurification.Addressingtheclimatecrisisrequiresamultifacetedapproach.Firstly,transitioningtorenewableenergysourceslikesolar,wind,andhydroelectricpoweriscrucialtoreducegreenhousegasemissions.Governmentsandindustriesmustinvestheavilyinrenewableenergyinfrastructureandtechnologies.Secondly,implementingsustainableland-usepractices,suchasreforestationandafforestation,canhelpabsorbcarbondioxidefromtheatmosphereandpreservebiodiversity.Protectingexistingforestsandecosystemsisequallyimportant.Furthermore,individualsalsohavearoletoplayinmitigatingclimatechange.Simpleactionslikereducingenergyconsumption,usingpublictransportation,minimizingwaste,andadoptingaplant-baseddietcanmakeasignificantdifferencewhenpracticedonalargescale.Raisingawarenessabouttheclimatecrisisandadvocatingforpolicychangesarealsoessentialcomponentsofthesolution.Inconclusion,theclimatecrisisisoneofthemostpressingissuesofourtime,requiringimmediateandsustainedeffortsfromallsectorsofsociety.Byworkingtogetherandimplementingeffectivestrategies,wecanmitigatetheimpactsofclimatechangeandcreateasustainablefutureforgenerationstocome.4.A.situationB.problemC.challengeD.crisis5.A.primarilyB.simplyC.mainlyD.basically6.A.leadsB.resultsC.causesD.contributes7.A.risingB.fallingC.meltingD.freezing8.A.whichB.thatC.whatD.where9.A.threatenB.harmC.damageD.destroy10.A.HeatwavesB.DroughtsC.FloodsD.Hurricanes11.A.devastatingB.destroyingC.damagingD.harming12.A.eventsB.situationsC.conditionsD.phenomena13.A.alsoB.tooC.eitherD.aswell14.A.severeB.seriousC.mildD.moderate15.A.extinctionB.reductionC.lossD.decrease16.A.quicklyB.rapidlyC.slowlyD.gradually17.A.HabitatsB.EcosystemsC.EnvironmentsD.Species18.A.cascadingB.causingC.leadingD.resulting19.A.servicesB.functionsC.rolesD.benefits20.A.FirstlyB.SecondlyC.FurthermoreD.FinallyTheadvancementsinartificialintelligence(AI)haverevolutionizednumerousindustries,fromhealthcareandfinancetotransportationandentertainment.AIalgorithmsarecapableofprocessingvastamountsofdataandlearningfromit,enablingthemtomakepredictionsanddecisionswithincreasingaccuracy.Thistechnologyhasthepotentialtosignificantlyimproveefficiency,productivity,andinnovationacrossvarioussectors.Inhealthcare,AIisbeingusedtodeveloppersonalizedmedicineplans.Byanalyzingpatientdata,includinggeneticinformation,medicalhistory,andlifestylefactors,AIsystemscanidentifythemosteffectivetreatmentsforindividualpatients.Thisapproachnotonlyimprovespatientoutcomesbutalsoreducesthecostofhealthcarebyminimizingunnecessarytreatments.Additionally,AI-powereddiagnostictoolsarebecomingincreasinglysophisticated,helpingdoctorsdetectdiseasessuchascanceratearlierstages,whichcangreatlyenhancethechancesofsuccessfultreatment.ThefinanceindustryhasalsoseensignificantbenefitsfromAI.AIalgorithmsareusedforcreditscoring,frauddetection,andalgorithmictrading.Theseapplicationshelpfinancialinstitutionsmakemoreinformeddecisions,reducerisks,andimprovecustomerservice.Forexample,AI-poweredchatbotscanprovidecustomerswithinstantassistanceandsupport,enhancingtheoverallbankingexperience.Inthetransportationsector,AIispavingthewayforautonomousvehicles.Self-drivingcars,trucks,anddronesarebeingdevelopedtoincreasesafety,reducetrafficcongestion,andimprovefuelefficiency.ThesevehiclesuseAIsensorsandalgorithmstonavigateandmakedecisionsinreal-time,potentiallytransformingthewaywetravelandtransportgoods.However,therapiddevelopmentandimplementationofAIalsoraiseethicalandsocietalconcerns.Issuessuchasdataprivacy,algorithmicbias,andthepotentialdisplacementofjobsneedtobeaddressed.EnsuringthatAIisdevelopedandusedresponsiblyiscrucialtomaximizeitsbenefitswhileminimizingitsrisks.AsAIcontinuestoevolve,itwillundoubtedlyhaveaprofoundimpactonourlives.Byfosteringcollaborationbetweentechnologists,policymakers,andethicists,wecanharnessthepowerofAItocreateamoresustainableandequitablefuture.21.A.IndustriesB.FieldsC.SectorsD.Areas22.A.AlgorithmsB.TechniquesC.SystemsD.Tools23.A.ProcessingB.HandlingC.AnalyzingD.Managing24.A.predictionsB.decisionsC.conclusionsD.recommendations25.A.significantlyB.slightlyC.marginallyD.subtly26.A.improveB.enhanceC.boostD.raise27.A.healthcareB.financeC.transportationD.entertainment28.A.developingB.designingC.creatingD.implementing29.A.personalizedB.generalC.standardD.universal30.A.geneticB.medicalC.lifestyleD.environmental31.A.systemsB.toolsC.devicesD.applications32.A.sophisticatedB.simpleC.basicD.primitive33.A.stagesB.phasesC.levelsD.points34.A.increaseB.enhanceC.improveD.boost35.A.benefitsB.outcomesC.resultsD.effects36.A.industryB.sectorC.fieldD.area37.A.scoringB.evaluatingC.assessingD.analyzing38.A.detectionB.identificationC.recognitionD.discovery39.A.tradingB.investingC.bankingD.lending40.A.institutionsB.companiesC.organizationsD.businesses41.A.assistanceB.supportC.guidanceD.advice42.A.enhancingB.improvingC.increasingD.developing43.A.AutonomousB.ManualC.AutomatedD.Operated44.A.safetyB.speedC.comfortD.efficiency45.A.congestionB.delayC.jamD.pile-up46.A.reducingB.decreasingC.minimizingD.lowering47.A.potentialB.abilityC.possibilityD.chance48.A.ethicalB.socialC.economicD.political49.A.concernsB.issuesC.problemsD.challenges50.A.developedB.implementedC.utilizedD.designed51.A.responsiblyB.carefullyC.cautiouslyD.wisely52.A.maximizingB.minimizingC.utilizingD.enhancing53.A.powerB.impactC.abilityD.influence54.A.technologistsB.scientistsC.engineersD.researchers55.A.policymakersB.administratorsC.managersD.leaders56.A.ethicistsB.philosophersC.scholarsD.experts57.A.harnessingB.utilizingC.exploitingD.developing58.A.sustainableB.stableC.feasibleD.viable59.A.equitableB.justC.fairD.balanced60.A.futureB.lifeC.worldD.society试卷答案1.Dfunction解析：句意强调神经元的基本功能，即如何运作。Ainteract（互动）、Bconnect（连接）、Coperate（操作）都不如Dfunction（功能、运作）准确全面。2.Arapid解析：描述神经元信号传递的速度，强调其快。Bregular（规律的）、Crandom（随机的）、Dreliable（可靠的）均不符合语境。3.Aintegration解析：强调多个神经元如何“整合”起来协同工作。Bseparation（分离）、Ccoordination（协调）虽有关联但不如integration（整合）更能体现网络的整体性。4.Dcrisis解析：根据后文描述的严峻性和紧迫性，全球气候问题应视为一场“危机”。Asituation（情况）、Bproblem（问题）、Cchallenge（挑战）程度不够。5.Aprimarily解析：强调主要原因主要是人类活动。Bsimply（简单地）、Cmainly（主要地）、Dbasically（基本上）中，primarily（首要地、主要地）与句意最契合。6.Ccauses解析：动词原形作主语，表示“导致”这些影响。Aleads、Bresults、Dcontributes虽有关联词，但此处需动词原形作主语表示原因。7.Cmelting解析：描述极地冰帽和冰川的变化状态，正在“融化”。Arising（上升）、Bfalling（下降）、Dfreezing（冻结）与语境不符。8.Awhich解析：非限制性定语从句，修饰前面的名词短语themeltingofpolaricecapsandglaciers，指代“冰帽和冰川的融化”这一现象。9.Athreaten解析：强调海平面上升对沿海社区和低洼地区的“威胁”。Bharm（伤害）、Cdamage（损害）、Ddestroy（摧毁）程度递进，threaten更合适。10.AHeatwaves解析：列举极端天气事件，前文已提及heatwaves（热浪），用并列连词and连接droughts（干旱）、floods（洪水）、hurricanes（飓风）。11.Adevastating解析：形容极端天气事件的破坏性影响。Bdestroying、Cdamaging、Dharming词形相近但devastating（毁灭性的）程度最强。12.Aevents解析：指代前文提到的各种极端天气现象。Bsituations（情况）、Cconditions（条件）、Dphenomena（现象）均不符合语境。13.Ceither解析：与上文“also”呼应，表示“也”面临威胁。Aalso、Btoo、Daswell通常放在句中或句末，且too常用于肯定句。14.Asevere解析：形容生物多样性面临的威胁是“严重的”。Bserious、Cmild、Dmoderate均不符合语境。15.Closs解析：指物种数量减少甚至“消失”，loss（损失、减少）最符合语境。Aextinction（灭绝）是loss的一种，但loss更泛指。16.Aquickly解析：强调物种适应环境变化的速度很慢。Brapidly（快速地）、Cslowly（慢地）、Dgradually（逐渐地）中，quickly（快速地）与slowly形成对比。17.AHabitats解析：指物种的栖息地被改变或破坏。BEcosystems（生态系统）、CEnvironments（环境）、DSpecies（物种）均不符合语境。18.Acascading解析：形容生态系统中一系列连锁的负面反应。Bcausing、Cleading、Dresulting均不符合语境。19.Aservices解析：指生态系统提供的功能，如授粉、净化水等“服务”。Bfunctions（功能）、Croles（角色）、Dbenefits（利益）均不符合语境。20.BSecondly解析：列举解决气候危机的步骤，前文有Firstly（首先），此处为Secondly（其次）。21.CSectors解析：指代AI革命化的多个“领域”或“行业部门”。AIndustries、BFields、DAreas均不够准确。22.AAlgorithms解析：指代处理数据和学习的核心“算法”。BTechniques、CSystems、DTools均不够具体。23.CAnalyzing解析：指代AI处理数据的核心动作是“分析”。AProcessing、BHandling、DManaging均不够准确。24.Apredictions解析：指代AI基于数据做出的“预测”。Bdecisions、Cconclusions、Drecommendations均不符合语境。25.Asignificantly解析：强调AI带来的改进是“显著”的。Bslightly、Cmarginally、Dsubtly均表示程度较轻。26.Benhance解析：指代AI提升效率、生产力、创新等是“增强”。Aimprove、Cboost、Draise均符合但enhance更强调质量提升。27.Ahealthcare解析：列举AI应用的第一个领域，即“医疗保健”。Bfinance、Ctransportation、Dentertainment为其他领域。28.Adeveloping解析：指代AI用于开发个性化医疗计划。Bdesigning、Ccreating、Dimplementing均不符合语境。29.Apersonalized解析：指代根据患者数据制定的“个性化”治疗方案。Bgeneral、Cstandard、Duniversal均不符合语境。30.Agenetic解析：列举患者数据包括的内容，如“遗传”信息。Bmedical、Clifestyle、Denvironmental均不符合语境。31.Dapplications解析：指代AI在医疗领域具体使用的“应用”。Asystems、Btools、Cdevices均不够准确。32.Bsophisticated解析：形容AI诊断工具越来越“复杂精良”。Asimple、Cbasic、Dprimitive均与语境相反。33.Astages解析：指代在早期阶段检测疾病。Bphases、Clevels、Dpoints均不符合语境。34.Benhance解析：指代早期检测如何“增强”治疗机会。Aincrease、Cimprove、Dboost均符合但enhance更强调质量。35.Boutcomes解析：指代早期检测带来的结果是“患者结果”的改善。Abenefits、Cresults、Deffects均符合但outcomes更强调结果。36.Bsector解析：指代金融行业的AI应用属于哪个“领域”。Aindustry、Cfield、Darea均不够准确。37.Ascoring解析：指代AI用于“评分”信用。Bevaluating、Cassessing、Danalyzing均符合但scoring更具体。38.Adetection解析：指代AI用于“检测”欺诈。Bidentification、Crecognition、Ddiscovery均不符合语境。39.Atrading解析：指代AI在金融领域的应用包括“交易”。Binvesting、Cbanking、Dlending均不符合语境。40.Ainstitutions解析：指代进行这些应用的“金融机构”。Bcompanies、Corganizations、Dbusinesses均符合但institutions更准确。41.Aassistance解析：指代AI聊天机器人提供的“帮助”。Bsupport、Cguidance、Dadvice均符合但assistanc