河南省武陟一中西区重点中学2025届高三第二次诊断性检测英语试卷含解析

河南省武陟一中西区重点中学2025届高三第二次诊断性检测英语试卷考生请注意：1．答题前请将考场、试室号、座位号、考生号、姓名写在试卷密封线内，不得在试卷上作任何标记。2．第一部分选择题每小题选出答案后，需将答案写在试卷指定的括号内，第二部分非选择题答案写在试卷题目指定的位置上。3．考生必须保证答题卡的整洁。考试结束后，请将本试卷和答题卡一并交回。第一部分（共20小题，每小题1.5分，满分30分）1．______tosuccesscan’tdefeatus.Instead,theycanonlymakeusstronger.A．Attempts B．BarriersC．Contributions D．Access2．—TherearenorelativearticlesontheInternet.Whatshallwedo?—MyGod！Therearealwaysnotanyusefularticleswhenyouwant.A．one B．it C．that D．any3．Newly________chairmanoftheChineseBasketballAssociation,YaoMinghasputreformingthedomesticgame’smanagementatthetopofhisagenda.A．appointing B．appointedC．beingappointed D．havingappointed4．Thefolksweredelightedatthemessageoftheirrelatives_______thatmineexplosion.A．survived B．tosurvive C．weresurviving D．surviving5．When________questionsinclass,oneshouldanswerthemasclearlyaspossible.A．asking B．toask C．tobeasked D．asked6．—Thefilmis,Ihavetosay,notabitinteresting.—Why?It’s________thanthefilmsIhaveeverseen.A．farmoreinteresting B．muchlessinterestingC．nomoreinteresting D．anylessinteresting7．Mom,canyougivemeanextra200yuanamonth?Son,wehavejustboughtahouse,andfromnowonweneedtopractisestrict.A．economyB．medicineC．self-controlD．patience8．—Anythingtodrink?Whataboutcoffee?—Er…IthinkI’llhaveacolddrinkcoffee.A．otherthan B．morethan C．lessthan D．ratherthan9．Hi,Mark.Howwasthemusicalevening?Excellent!AlesandAndyperformed_________andtheywonthefirsprize.A．skillfully B．commonly C．willingly D．nervously10．Allenfollowedhiscustomeracrosstheyardandstoodonthestepofthehouse,twoshoppingbags.A．lifted B．havinglifted C．tolift D．lifting11．Throughouthistory,Chinanevercolonizedanynation._________thispeacefultradition,itiscommittedtobuildingacommunitywithasharedfutureformankind.A．InlinewithB．InregardtoC．InharmonywithD．Inadditionto12．Daviddidn’tattendhisdaughter’sgraduationceremony,buthedoeswishhethere.A．shouldbe B．wouldbeC．hadbeen D．were13．Asheworksinaremotearea,hevisitshisparentsonly_____A．anxiouslyB．occasionallyC．practicallyD．urgently14．—Youshouldhavehelpedyourmomwashthedishes．—Imeant．Butsheisalwaystellingmetostudy．A．todo B．to C．doingso D．doing15．CanIparkmycarhere?Surenot,wedon’tallowhere.A．toparking B．park C．topark D．parking16．Theyaresmiling.There______muchtroublesolvingtheproblem.A．couldn’tbe B．mustn’tbeC．can’thavebeen D．mustn’thavebeen17．Itisreportedthehousingpricesinsomebigcitiesfallindifferentdegrees.A．whichB．whatC．thatD．where18．Infrontofthewholeaudience,PremiereLimadehispromise______thegovernmentwouldtryitsbesttosolvetheproblemofpovertyinChina.A．whatB．whichC．whetherD．that19．Theywereabroadduringthemonthswhenwewerecarryingouttheinvestigation,orthey__________toourhelp.A．wouldhavecome B．couldcomeC．havecome D．hadcome20．Don’tletthechildwhois________gotoschool．A．soyoungasto B．notoldenoughto C．notoldenough D．tooyoungto第二部分阅读理解（满分40分）阅读下列短文，从每题所给的A、B、C、D四个选项中，选出最佳选项。21．（6分）Whenyou’reajuniorinhighschool,threelittlelettersquicklybecomelargerthanlife:SAT.Atthestartofmyjunioryear,Irealizedthattheenvironmentwaspackedwithcompetition.Surprisingly,thispressuredidn’tcomefromadults.Itcamefromtheotherstudents.Everyoneinmygradehadcollegeonthebrain.Togetintothecollegeofourchoice,weallbelieved,wehadtooutcompeteandoutscoreeveryoneelsewithlesssleep,becausetimeforsleepingwastimeyoudidn’tspendstudyingfortheSAT.Iletmyselfgetsweptupinthepressure.Mynewmottowas,ifIwasn’tineverysinglehonorlevelclass,Iwasn’tdoingenough.Iwasbad-temperedandIcouldn’tfocus.Istoppedtalkingtomyfriendsandmymom,andIcouldn’tfigureoutwhoIwas.Ididn’thavetheconfidencetoknowthatmyownpassionsanduniqueskillswerewhatwouldmakemestandouttocolleges.That’swhenIrealized:IamnotmySATscore.TryingtosticktowhatIthoughtcollegeswantedmaskedwhoIreallyam.IdecidedtorelyonmystrengthsandgetawayfromthecrazypressureIwasputtingonmyself.Insteadofforcingmyselfintohigherlevelsofmath,Itookonanextrahistoryclass.IlearnedhowtolovewhatIwasdoingandnotwhatIthoughtIwassupposedtodo.Ilearnedtoshineasanindividual,notafacelessmemberofthecrowd.AndIfoundthatnotonlywasthisbetterformyhappiness,butitalsomadememoreeffectiveandefficientwhenIstudied.Tome,individualitymeanshavingtheconfidencetodecidewhoIamandwhoIwanttobe,andanumberonapageisnevergoingtochangethat.Iammoresureofmyself,andmorereadytoapplyforcollege,thanever.1、Atthestartofthejunioryear,theauthordecidedtostudyfortheSAT________.A．toovercomethepressurefromotherhighschoolstudentsB．totesthowgoodshewasatstudyingcomparedtoothersC．becauseitwasexcitingtocompetewithotherstogetintocollegeD．becauseshewaseagertogetanadvantageoverothersinthecompetition2、Whendidtheauthorrealizesheshouldn’tjustcompeteforscores?A．Whenshegotineverysinglehonorlevelclass.B．Wheneverybodystoppedtalkingtoher.C．Whenshefoundshewasnolongerherusualself.D．Whensheforcedherselftotakeadvancedmaths.3、WhatcanyouinferfromParagraph5?A．Shetriedtoliveaswhoshewas,notjustastudentfocusingongrades.B．Shelearnedtoteamupwithothersandsogainedefficiency.C．Shemanagedtodowellinbothmathsandhistoryclasses.D．Shewantedtobenumberoneandnoonecouldchangehermind.4、Whichstatementbestexpressesthemainideaofthepassage?A．Pressurebringsoutthebestinyou.B．Youwillstandoutbybeingyourbestself.C．Thingswillhappenwhetheryoulikeitornot.D．Lifeisjustamatterofdecisivetimes.22．（8分）TheGreatWall,ChinaStretchingover21,000kilometers,theGreatWallwasbuilttopreventinvasionsandhasahistoryofmorethan2,000years.UNESCOinFebruary2019callsitanabsolutemasterpiece,notonlybecauseoftheambitiouscharacteroftheundertakingbutalsotheperfectionofitsconstruction.”Butperfectionisn’tprotection.51.2percentoftheGreatWallhadeitheralreadydisappearedorisatasignificantriskofdisappearing.Besidesforwindandrainerosion,themainreasonsforthedestructionoftheGreatWallarehumanfactorssuchastourism,construction,humancontactandsoon.Pamukkale，TurkeyPamukkale,whichmeans“cottoncastle”inTurkish,isfamousforitsshiningwhitecalciteterraces(方解石阶地)withwarmandmineral-richwatersoverrun.BeforebeinglistedasaWorldHeritageSitein1988,Pamukkalehadbeenseverelydamagedbyhumanactivities.Peopleusedhotspringwatertofillswimmingpools,somevisitorsstoodontherocksandsomeevenbathedinthehotspringswithsoapandshampoo.Toprotecttheterraces,theTurkishgovernmenthasdecidedtopulldownthehotelsandrequirealltouriststovisitthissitebarefoot.GreatBarrierReef,AustraliaHometo400typesofcoraland1,500speciesoffish,theGreatBarrierReefdrawsvisitorstoAustraliafromallovertheworld.However,theGreatBarrierReefisexpectedtosufferfromincreasinglyfrequentbleachingevents,casesinwhichcoralsturnwhiteandmaydie,accordingtoaUNESCOreport.Theheatwavescausedbyglobalwarminghavekilledhalfofthecoralhereinthetwoyears,accordingtoaCNNreport.Pollutionfromindustrydevelopmentsandharmfulfishingpracticesarealsobigconcerns.TheDeadSea,JordanAt423metersbelowsealevel,theDeadSeais10timessaltierthantheocean,meaningthatthewaterissodense,eventouristswhocan9tswimwillbeabletofloat.Buttheseasideresortsbuiltinthe1980snowsitkilometersawayfromthewater’sedge,whichhaslosthalfofitssurfaceareainthepast40years.Thedamageisirreversibleduetothenatureofthemineralindustryandthetypeofagriculturalusethathasdrainedthewater.1、Whichareyourequiredtovisitwithoutshoes?A．TheGreatWall,China.B．Pamukkale,Turkey.C．GreatBarrierReef,Australia.D．TheDeadSea,Jordan.2、Whichofthefollowingstatementsistrue?A．MainreasonsforthedestructionoftheGreatWallcomefromwindandrainerosion.B．Pamukkalewasdamagedbyhumanactivitiesafter1988.C．PollutionandtheheatwavescausedbyglobalwarmingkillmuchcoralintheGreatBarrierReef.D．HalfoftheDeadSeasurfaceareahasdisappearedinthepasttwodecades.3、Whatdotheabovespotshaveincommon?A．Theyareallfamousendangerednaturalspots.B．They’redamagedonlyfromhumanactivities.C．Theyalldrawtheattentionofthegovernments.D．They’reallseriouslydamaged.23．（8分）Itwas2012,andsomewhereonacassava(木暑)andbananafarminruralTanzania,therewerefourofusstandinginacircle:me,twofarmersnamedJoyceandElijah,andtheformersecretarygeneraloftheUnitedNations，KofiAnnan.ElijahandJoycedidmostofthetalking.Theytoldushowthisfarmwasunlikeanytheyhadworkedon;howtherewereimprovedcropvarietiesandnewtoolstoprocesstheharvest.Therewasevenadaycarecentrenearthefarm.Thisway,womencouldspendmoretimesellingwhattheygrew*Irattledoff(不假思索地说出)somequestions.Doyousellyourcassavaonlyhere一ordoyoushipitsomewhereelse?Howfaristhemarket?Haveyouseenadifferenceinyouryields?Kofi,though,mostlylistened.Later,afterweleftthefieldsandwalkedtowardsthedaycarecentrewheretherewasabiggercrowd,Kofistartedtalking.Hewastellingjokes,tryingtoputeveryoneatease,anddoingaverygoodjobofit.Themanhadthedeepest,mostinfectiouslaughI’veeverheardandanincrediblycommandingvoice.Hesoundedlikeanactorplayinghimself.KofiandIhadattendedalotofthesameUNevents,andhe’dvisitedourfoundation’sofficesinSeattleafewtimes,soI’dseenhimcharmaroombefore.Butthisdayonthecassavafarmwasdifferent.Hewascompletelyathomehere.IsupposeIshouldn’thavebeensurprised:KofiAnnan,ofalltheworldleadersIhadmet,hadspentthemosttimethinkingabouthowtohelpplaceslikethisfarmandpeoplelikeJoyceandElijah.WhenmyhusbandBillandIstartedourfoundationin2000，westillhadsomanyquestionsaboutthebestwaystofightpovertyanddisease,andKofi,itseemed,alreadyhadtheanswers.Thatyear,he’dwrittenamanifesto(宣目)abouttheUN’sroleinthe21stcentury.Initsfinalpages,he’dincludedasetoftargetsaroundpovertyanddiseasereductionthathewantedtheworldtoachieveby2015.ThesebecameknownastheMillenniumDevelopmentGoals(MDG),andatfirst,criticsdismissedthemimmediately.Cutextremepovertyinhalf?StopthespreadofHIV,malariaandTB,thethreegreatestkillersinpoorcountries?Atbest,itwasoverlyoptimistic.Kofiwasn’tsatisfiedwithjustsettingthegoals,though.Hewantedtopushtheworldtoachievethem.NoothersecretarygeneralwassoabletoconnecttheUN’sheartwithitsbrain,itsmissiontoliftupthesickandthepoorwithaneffectiveplanfordoingso.Hewasamaster，too,atbringingworldleadersalongfortheride.Today,thereare27millionpeoplealivewhowouldhaveotherwisediedfromHIV-relatedillness,TBormalariaAndtheylive,inlargepart,becauseKofigatheredtheworldtoestablishtheGlobalFund,whichpaysformedicinesandthingsthatpreventthosediseasesfromspreading,suchasmosquitonets.Theworldmetitsgoalofhalvingtheglobalpovertyrateby2015;infact,itdidsofiveyearsaheadofschedule,in2010.“Developmentexperts，”oneobserverwrote,“arestillrubbingtheireyes.WhenhereceivedtheNobelPeacePrizein2001，Kofisaidthat“today’srealbordersarenotbetweennations,butbetweenthepowerfulandpowerless”.HesawAfrica’ssmallfarmersaspartofthelattercampandwantedtogivethemawaytoliftthemselvesoutofpoverty.Thiswaswhatledustothatcassavafarmbackin2012.Irememberthatafterourvisitthatday,Kofithankedmeforthefoundation’swork.Hewasgenerousinhispraise，andthenhegavemeanickname.“MamaMelinda，’’hecalledme.Itwasatermofrespect,typicallygiventoanelder,andIfelthonoredbutsurprised.MamaMelinda?Iftherewasonepersonwhodeservedsuchanhonour,Ithoughtitwasn’tme.1、KofiAnnan’sinspectionofthefarmismentionedto.A．introducethecarefreelifestyleofAfricanpeopleB．illustratehiscloserelationshipwithAfricanfarmersC．emphasizethegravityofpovertyinAfricancountriesD．showhisconcernforthepoverty-reliefworkinAfrica2、WecanknowfromthepassagethattheMDG.A．failedtowinsupportfromleadersoftheworldB．wastooambitiousandoptimistictobesuccessfulC．focusedmoreonthegoalsthaneffectivemeasuresD．revealedKofi’sextraordinarywisdomandcapability3、WhatcanweinferfromtheunderlinedpartinPara.7?A．Itwashardtoseewherethehopelay.B．ThesuccessoftheMDGwasunbelievable.C．Thedevelopmentexpertsweremovedtotears.D．Thelong-termcommitmentmadepeoplesleepy.4、WecanlearnfromKofi’swordsinPara.8that.A．thepowerfulpeopleruleoverthepowerlessmassesB．thepowerfulnationsoftenoccupytheirpowerlessneighborsC．thegapbetweentherichandthepoorseparatestheworldapartD．therichandthepoorcountriesshouldcompromiseonborderissues5、WhichofthefollowingcanbeusedtodescribeKofiAnnan?A．Charming,aggressiveandstubborn. B．Ambitious,easy-goinganddutiful.C．Conservative,humorousandpositive. D．Bureaucratic,sympatheticandgenerous.6、What’sthebesttitleforthepassage?A．MamaMelinda:anicknamewithgreathonour.B．TheUN:anorganizationfullofdifferentvoices.C．Africa:alandblessedwithconsiderableopportunities.D．KofiAnnan:astatesmandevotedtoglobaldevelopment.24．（8分）AnewMagicBenchdesignedbyDisneyResearchletsyouinteract(互动)withlovelyanimated(动画的)character—andnospecialglassesorearphonesarerequired.Instead,thecompleteenvironment-theseat,thesitterandthecartooncharacters-ismirroredonascreenoppositethebenchmakingitpossibleforotherstowatchthesceneunfold.Howdoestheillusionwork?Acameraandsensorcatchimagesandgatherdepthinformationaboutphysicalobjectsthebenchandtheperson.Andthencomputertranslatesthemintothe3Danimations.Meanwhilesensorsoftouchbuiltintothebenchdelivershakingthatishappeningatthesametimeandspeedtoanimatedactionsonthescreen,creatingtheillusionthattheanimatedfiguresareoccupyingreal-worldspacenexttotheuser.“Ourgoalforthisprojectwas:hearacharactercoming,seethementerthespace,andfeelthemsitnexttoyou,”saidMosheMahler,principaldigitalartistatDisneyResearch.Unlikethetraditionalmobiletechnology,oneofwhoselimitationsisthatonlyasingleusercanseeitsillusion,theMagicBenchallowsgroupsofpeopletogatherinasingleenvironmentandcollectivelyparticipateinanaugmented—reality(扩充实境)experience,allatthesametime.Inavideoshow,asmallcartoondonkeyrunsintoviewandkicksthebench,causingsharpsoundandmakingtheseatedpersonjumpinsurprise.Anothertestshowstwopeopleonthebench,reactingastheyfeelananimatedrabbitskipupbesidethemandjumpupanddown.Whenauserpasseshishandovertherabbit,ashadowmovesacrossitshead,asthoughitwereoccupyingthesamephysicalspaceasthepersonnexttoit.1、WhatdoestheMagicBenchneedtoworkproperly?A．Specialglasses. B．Earphones. C．Amirror. D．Ascreen.2、Whatdoestheunderlinedword“illusion”inParagraph2referto?A．Theshakingthatishappening. B．The3danimationsonthescreen.C．Thefiguresaboutphysicalobjects. D．Theinteractionwithanimatedfigures.3、What’stheMagicBenchdifferentfromthetraditionaltechnology?A．Itsfantasycanbeseenonlybyasingleuser.B．Itisdesignedtocreatemoreanimatedcharacters.C．Itallowsmanypeopletoexperiencethefantasytogether.D．Itsuserandtheanimatedcharacteroccupythesamespace.4、Whichisthebesttitleofthetext?A．MagicBenchPutsYouinthePictureB．AudienceBecomeCartoonCharactersC．EntertainmentIndustryEntersaNewStageD．Disney’sCartoonFiguresComeintoReality25．（10分）Amazingconceptimageshaveshownwhathomesofthefuturecouldlooklike,aspreparationsaremadefortheworld’sfirstfreefrom3D-printedproperty(房产).ExpertswillbuildahousecalledCurveAppeal,whichwillbe3D-printedoff-sitebeforebeingputtogetheron-sitetocreatetwooutsidewalls,aroofandaninsidepart.Thesefourmainsectionswillthenbejoinedtogether.Although3D-printedbuildingshavebeenmadebefore,thishome-tobeconstructedinChattanooga,Tennessee,laterthisyear—willbethefirstofitskind,asitwillcontainnoregularshapesorangles.ThehouseisthecreationofthedesigncompanyWATG,basedinLondonandCalifornia.ThedesignforCurveAppealdrawsinspirationfromtheCaseStudyHouseprogram.Thearchitectsleadingtheprogramwerefamedforconstantlypushingthelimitsintermsofminimalist(极简主义)materials,andtryingtocreateopen-planspacesthatfocusedonenhancing(增强)naturallight.Inawrittenstatement,aspokesmanforWATGsaid,“Employingmanyofthesamemodemdesignprinciples,CurveAppealisthenextevolutionarystep.It’simportantthatthearchitectureandtheenvironmentworktogetherharmoniously.ThechosensiteisstepsawayfromtheTennesseeRiverinabeautifulwooded,sunlitarea.”WATGwasawardedthefirstprizeintheFreeformHomeDesignChallengein2016andgivenprizemoneyof$8,000tomakeitsplansareality.Thecompetitionwasaimedatarchitects,designers,engineersandartists.Participantswerechallengedtodesigna600to800sqftsingle-familyhomethatrethinkstraditionalaesthetics(美学),ergonomics,construction,buildingsystemsandstructure.Overthelastyear,WATG’sChicagoofficehasbeendevelopingtheirdesignwithBranchTechnology.Thisprojectiscurrentlyunderway,workingtowardsbreakinggroundlaterthisyear.Oncecompleted,theCurveAppealhomewillhaveopenandlight-filledinsidelivingspaces.1、FromthepassagewecanknowthatCurveApple.A．willbedifferentfromanordinaryhouseB．isthefirst3D-printedbuildingC．hasapparentwallsandaroofD．waseverbuiltintheworld2、WhereisthearchitectlocatedaccordingtoParagraph4?A．FarawayfromtheTennesseeRiver.B．InthewoodsneartheTennesseeRiver.C．BetweentheTennesseeRiverandthewoods.D．Nexttosomemodemarchitectures.3、WhatdoestheFreeformHomeDesignChallengedo?A．Itmotivatesparticipantstodesignatrandom.B．Itemphasizestraditionsratherthanmodernization.C．Itsponsorscompetitorswhennecessary.D．Ithelpsputcreativeideasintopractice.4、What’sthepassagemainlyabout?A．Whatourhomeswilllooklikeinthefuture.B．TheFreeformHomeDesignChallenge.C．Theworld’sfirstfreeform3D-printedhouse.D．Thedevelopmentof3Dinarchitecture.第三部分语言知识运用（共两节）第一节（每小题1.5分，满分30分）阅读下面短文，从短文后各题所给的A、B、C和D四个选项中，选出可以填入空白处的最佳选项．26．（30分）Animportantpartofanybusinessrelationshipisinformalconversation.Beforeyoustartadiscussion,1,makesureyouunderstandwhichtopicsare2andwhichareconsideredtaboo(禁忌)ina3culture.LatinAmericansenjoy4informationabouttheirlocalhistory,art,andcustoms.5questionsaboutyourfamily,andbesuretoshowpicturesofyourchildren.Youmayfeelfreetoask6questionsofyourLatinAmericanfriends.TheFrenchthinkofconversationasanart7,andtheyenjoythevalueoflivelydiscussionsaswellas8.Forthem,argumentscanbeinteresting—andtheycan9prettymuchoranytopic—10theyoccurinarespectfulandintelligentmanner.IntheUnitedStates,businesspeopleliketodiscussa11rangeoftopics,includingopinionsaboutwork,family,hobbies,andpolitics.InJapan,China,andKorea,however,peoplearemuchmoreprivate.Theydonottalkmuchabout12thoughts,feelings,oremotionsbecausetheyfeelthatdoingsomighttakeawaytheharmoniousbusinessrelationshipthey’retryingto13.MiddleEasternersarealsoprivateabouttheirpersonallivesandfamily14.Itisconsidered15,forexample,toaskabusinessmanfromSaudiArabiaabouthiswifeorchildren.Asageneral16,it’sbestnottotalkaboutpoliticsorreligionwithyourbusinessfriends.This17getyouintotrouble,18intheUnitedStates,wherepeopleholddifferentviews.Inaddition,discussingone’ssalaryisusuallyconsideredunsuitable.Sportsis19afriendlysubjectinmostpartsoftheworld,althoughbecarefulnotto20anationalsport.Instead,befriendlyandpraiseyourhost’steam.1、A．therefore B．however C．thus D．then2、A．enjoyable B．respectable C．available D．suitable3、A．particular B．special C．especial D．usual4、A．requiring B．requesting C．speaking D．sharing5、A．Prepare B．Collect C．Expect D．Imagine6、A．similar B．strange C．interesting D．favorable7、A．lesson B．show C．form D．exhibition8、A．agreements B．equipment C．disagreements D．instruments9、A．say B．cover C．make D．hold10、A．asfaras B．eventhough C．aslongas D．forfearthat11、A．long B．various C．wide D．small12、A．other B．our C．your D．their13、A．instruct B．direct C．control D．build14、A．history B．matters C．tree D．pictures15、A．rude B．polite C．curious D．dangerous16、A．idea B．rule C．regulation D．direction17、A．can B．must C．need D．should18、A．even B．still C．never D．not19、A．hardly B．instantly C．nearly D．typically20、A．beat B．criticize C．strike D．organize第二节（每小题1.5分，满分15分）阅读下面材料，在空白处填入1个适当的单词或括号内单词的正确形式。27．（15分）Respectis1．toanyrelationship.Respectisthekeyto2．friendships,topoliticalalliances,andtointernational3．.Throughrespectyoushowthatsomeonematterstoyou.Your4．ofothers5．yourlevelofrespectforthem.6．ismuchmorethanjustgrowingplants.Tomakeagarden7．,itisjustasimportantthatthe8．inwhichtheplantsareplacedisright.Youcanhaveyourgarden9．andconstructedby10．第四部分写作（共两节）第一节短文改错（满分10分）28．（10分）假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。每处错误仅涉及一个单词的增加、删除