陜西省西安電子科技大學(xué)附中2025屆高三第五次模擬考試英語試卷含解析

陜西省西安電子科技大學(xué)附中2025屆高三第五次模擬考試英語試卷注意事項(xiàng)1．考生要認(rèn)真填寫考場號(hào)和座位序號(hào)。2．試題所有答案必須填涂或書寫在答題卡上，在試卷上作答無效。第一部分必須用2B鉛筆作答；第二部分必須用黑色字跡的簽字筆作答。3．考試結(jié)束后，考生須將試卷和答題卡放在桌面上，待監(jiān)考員收回。第一部分（共20小題，每小題1.5分，滿分30分）1．I'mcallingtoenquireabouttheposition__________inyesterday'sChinaDaily.A．a(chǎn)dvertised B．tobeadvertised C．a(chǎn)dvertising D．havingadvertised2．－You’vebeencoughingsobadlyrecently.Giveupsmoking,please.－_______.IthinkIamaddictedtoit.A．Itcan’tbehelped B．GoodideaC．Sofar,sogood D．Farfromit3．PeoplebelievethattheChinaDreamisnotverydifficult________solongasthewholenationworkshardforit.A．realizing B．toberealizedC．realized D．torealize4．Lackofsleep_______leadtoweakenedimmunityandmemory,andalsoslowphysicalgrowth.A．shall B．must C．should D．can5．They_______thebusinessdealinlessthananhour,afterwhichtheyhadagolfgame.A．wrappedup B．pickedupC．calledup D．tookup6．—WhichclassicalChinesepoemdoyoulikebest?—Don’tlaughifwelaydrunkenonthebattleground;howmanysoldiersevercameback______.A．oldandyoung B．upanddown C．safeandsound D．rightandwrong7．---Wewantsomeonetodesignthenewartmuseumforme.---_____theyoungfellowhaveatry?A．Shall B．May C．Will D．Need8．It’s_______forpeopletoblametrafficjams,thecostofgasandthegreatspeedofmodernlife.A．reasonable B．a(chǎn)vailableC．a(chǎn)ccurate D．cautious9．Althoughhedidnotdoit___________,hedefinitelyhadsomeresponsibility.A．instantly B．deliberatelyC．a(chǎn)ccidentally D．casually10．Thiskindofglassesmadebyexperiencedcraftsmen_________comfortably.A．iswornB．wearsC．wearing D．a(chǎn)reworn11．Thoughhelacksexperience,thearrangementsareall_______forthemeetingnextThursdayaheadoftime.A．inparticular B．inplace C．inpreparation D．intime12．Itwasthenaturaldisaster,ratherthanhumanerrors,that________forthedeathofsomanyinnocentpeople.A．a(chǎn)reblamed B．wastoblame C．wasblamed D．weretoblame13．——HowdidyoufindyourtriptoWaterParkinthesummerof2016?——Ithoroughlyenjoyedit.Itwas________thanIexpected.A．evenmuchinteresting B．farmoreinterestingC．sofarinteresting D．farfrominteresting14．Havinglostsomethinginthecloakroom，Iwentinsidetogetit，andfoundRoy________thepocketsofpeople’scoats.A．goingaround B．goingafterC．goingagainst D．goingthrough15．---Thereareprobablyalienslivinghereonearth.---_____!Ican’tbelieveyousaidthat.A．Comeon B．ForgetitC．Goahead D．Allowme16．Afterheconsultedwithhisprofessor，anideawasbeginningto____________inhismind.A．payoff B．takeshapeC．workout D．makeup17．_____tomanagetimewisely,andyoucanmakethemostoutofeachday.A．LearningB．TolearnC．LearnedD．Learn18．IamabetterreaderthisyearthanIwaslastyearbecauseI________tohundredsofnewconceptsandideas.A．haveexposedB．hadbeenexposedC．havebeenexposedD．wasexposed19．Thebookisnowoutofprint,______itcaneasilybeborrowedfromlibraries.A．a(chǎn)ndB．forC．soD．but20．The88thAcademyAwardCeremonywasheldinDolbyTheatre______seatsanaudienceofapproximately3,400.A．where B．whose C．when D．which第二部分閱讀理解（滿分40分）閱讀下列短文，從每題所給的A、B、C、D四個(gè)選項(xiàng)中，選出最佳選項(xiàng)。21．（6分）Adultsalwaysthinkitsurprisingthattheycanrememberwellwhattheylearnedaschildrenbuthaveneverpracticedeversince.Amanwhohasnothadachancetogoswimmingforyearscanstillswimaswellaseverwhenhegetsbackinthewater.Hecangetonabicycleaftermanyyearsandstillrideaway.Hecanplaycatchandhitaballaswellashisson.Amotherwhohasnotthoughtaboutthewordsforyearscanteachherdaughterthepoemthatbegins“Twinkle,twinkle,littlestar”orrememberthestoryofCinderellaorGoldilocksandtheThreeBears.Oneexplanationisthelawofoverlearning,whichcanbestatedasfollows:Oncewehavelearnedsomething,additionallearningtrials(嘗試)increasethelengthoflimewewillrememberit.Inchildhoodweusuallycontinuetopracticesuchskillsasswimming,bicycleriding,andplayingbaseballlongafterwehavelearnedthem.Wecontinuetolistentoandremindourselvesofwordssuchas“Twinkle,twinkle,littlestar’’andchildhoodtalessuchasCinderellaandGoldilocks.Wenotonlylearnbutoverlearn.Themultiplicationtables(乘法口訣表)areanexceptiontothegeneralrulethatweforgetratherquicklythethingsthatwelearninschool,becausetheyareanotherofthethingsweoverlearninourchildhood.Thelawofoverlearningexplainswhycramming(突擊學(xué)習(xí))foranexamination,isnotasatisfactorywaytolearnacollegecourse,thoughitmayresultinapassinggrade.Bycramming,astudentmaylearnthesubjectwellenoughtogetbyontheexamination,butheislikelysoontoforgetalmosteverythinghelearned.Alittleoverlearning,however,isreallynecessaryforone’sfuturedevelopment.1、Whatisthemainideaofparagraph1?A．Childrenhaveabettermemorythangrown-ups.B．Peoplerememberwellwhattheylearnedinchildhood.C．Storiesforchildrenarceasytoremember.D．Poemreadingisagoodwaytolearnwords.2、Howdidtheauthorexplainthelawofoverlearning?A．Givingexamples.B．Settingdowngeneralrules.C．Makingacomparison.D．Presentingresearchfinding.3、Accordingtotheauthor,beingabletousemultiplicationtablesis.A．a(chǎn)specialcaseofcrammingB．a(chǎn)skilltodealwithmathproblemsC．a(chǎn)resultofoverlearningD．a(chǎn)basicsteptowardsadvancedstudies4、Whatistheauthor’sviewpointoncramming?A．Itleadstofailureincollegeexams.B．Itincreasesstudents’learninginterest.C．Ifspossibleloresultinpoormemory.D．It’shelpfulonlyinalimitedway.22．（8分）Theremightbeasmanyas10millionspeciesofcomplexlifeonthisplanettoday——ahugenumber.Butaddupallofthecomplexspeciesthateverlivedandsomebiologiststhinkthegrandtotalwouldbeaboutfivebillion.Theestimateleadstoanastonishingconclusion:astaggering99%ofspeciesarenotaroundanymore.Theyhavebeendriventoextinction.Morespeciesarejoiningtheranksoftheextincteveryyear.Manyscientistsbelievewearelivingthroughanepisodeofremarkablyrapidextinction,onascalethathasbeenseenonlyfivetimesinthelasthalfabillionyears.Theycallthiscurrentepisodethesixthmassextinction——alarge,globaldeclineinawidevarietyofspeciesoverarelativelyshortperiodoftime.Andtheytendtoagreethathumansarethemaincause.Over-hunting,overfishing,andhuman-drivenhabitatlossarepushingmanyspeciestothebrink.Infact,wehavechangedtheplanetsomuchthatsomegeologistsarenowsuggestingthatwehaveenteredanewphaseinEarth’shistory;anepochtheycallthe＂Anthropocene＂.By2100,itisexpectedthathumanswillhavecausedtheextinctionofuptohalfoftheworld’scurrentspecies.Becausewearelivingthroughthisextinction,itisrelativelyeasyforustostudythedrivingforcesbehindit.Buthowdowedeterminewhatcausedothermassdie-offsthathappenedlongago?Todosowehavetolookatwhatarchaeologists,palaeontologists,geologistsandotherscientistshaveconcludedfromtheevidencetheyhavegathered.Thetroubleis,thosescientistsdonotalwaysagreewithoneanother——evenaboutthemostrecentextinctionevent.Aswellasthefive-orsix-massextinctions,therehavealsobeenmanysmallerextinctions.OneoftheseminiextinctioneventshappenedtowardstheendofthePleistocene,afewtensofthousandsofyearsago.Itissometimescalledthe＂megafaunal＂extinctionbecausemanyofthespeciesitclaimedwereparticularlylargeanimals,weighingmorethan97lb(44kg).However,itscauseremainsadebateamongstscientists.1、Whatcanwelearnaboutthesixthmassextinction？A．Humansarethemaincauseofit.B．Itmeansaglobaldeclineoveralongtime.C．ItoccurredtowardstheendofthePleistocene.D．Scientistsstilldisagreeaboutthecauseofit.2、Whatcanbeinferredfromthetextaboutspecies？A．99%ofspecieswillnotbearoundanymoreby2100.B．Bythe22ndcentury,therewillprobablybeaboutfivemilliononthisplanet.C．Abouteightyearslaterwewillenterwhatiscalledthe＂Anthropocene＂.D．Itisnoteasyforustofigureoutcausesbehindthe＂Anthropocene＂.3、Whichofthefollowingisclosestinmeaningtotheunderlinedwordinthelastparagraph?A．Landanimals.B．Marinelife.C．Hugeanimals.D．Flesh-eatingcreatures.23．（8分）Althoughnotasmuchasinthepast,grandparentsaretheteachersoftheNavajo(納瓦霍人)youth.Theymakeyoungpeopleawareoflifeatanearlyage.Theparentsgrantthemtheprivilegeofteachingthechildren,andthegrandparentstakegreatprideinraisingthechildrenoratleasthavingabigpartinraisingthem.Youngchildrenoftenstaywiththeirgrandparentsforyearsatatime,developingacloseandtrustingrelationship.ThegrandparentsteachthechildrenNavajolegendsandtheprincipleoflife,emphasizingbothnewculturetrendsandthepreservationoftraditions.Thegrandparentsarealsooftentheleadingfiguresinteachingtheyouththeartsofweaving,caringforthelivestock,usingherbalmedicine,andotherartsandcrafts.Thechildrenaretaughttorespecttheirelders,tocareforthem,tohelpthemwhenevertheyareinneed,andtolearnfromthem.Youngpeopleareurgedtolistenwithcaretothewordsoftheireldersandtokeepasmuchwisdomaspossible.Grandparentsoftengotosocialgatheringsandtraditionalevents,andtheyounghaveopportunitiestolearnmoreabouttheircultureandtraditions.Ilivewithmygrandmotherforthirteenyears,andsheraisedmeintheoldwaysofourpeople.AlthoughIwasgoingtoschool,shetaughtmeasmuchasshecouldaboutourtraditions.Shewasabeautifulwoman.IfIhadachance,Iwouldlistenagaintoherwiseteachings,expressedwithkindnessinasoftvoicethattouchedmyheart.Weusedtoplantcornandpumpkineverysummer.Theynevergrewbigenoughtofeedus,butweplantedthemanyway.Iaskedmygrandmotherwhy.Shesaid,“Grandson,ourplantswillbefarmorebeautifulthantheflowersoutsidethefence.”IdidnotunderstanduntilonedayIsawtheirbeautyasIwascomingoverthehillwithher.Shesaid,“Anythingthatisapartofyouisalwaysfarmorebeautifulthanthethingswhichyoupassby.”Wehadsomebeautifulyearstogether.IamgladsheisapartofmeandIamapartofher.Childrenusedtobewelldisciplined,possessingmorerespectforculture,tradition,andbeliefsthantheydonow.TheworldoftheNavajohasbeeninfluencedbythewesternworld,andthegrandparentshavelesscontrolandinfluencethantheyusedto.Buttheyoungpeoplewhohavebeentouchedbytheirteachingshaveglimpsedawayoflifebeyondwhatmostpeopleknowtoday.1、WhatcanwelearnfromParagraph1?A．Parentshatetotakethetroubletoraisechildren.B．SchoolsarenotverypopularwiththeNavajoyouth.C．Grandparentsareusuallyunwillingtoteachtheirgrandchildren.D．Childrenlearnaboutthemeaningoflifefromtheirgrandchildren.2、Whydidtheauthor’sgrandmotherplantcornandpumpkin?A．Becauseshehatedwildflowers.B．Becausesheneededtofeedherfamily.C．Becauseshetriedtomakeherfencemorebeautiful.D．Becauseshewantedhergrandsontolearnalifelesson.3、What’stheauthor’sopinionaccordingtothepassage?A．Grandparentsarethesourceoftraditionalculture.B．Hisgrandmother’steachingcouldreplaceschooling.C．ThewesternworldishardlyinfluencedbytheNavajos.D．Itisimpossibletogetgrandparentsinvolvedinteachingagain.4、What’sthepurposeofthearticle?A．Tohonortheauthor’sgrandmother.B．TosharewithreadersaNavajoculture.C．ToemphasizethegreatnessofNavajo.D．TointroducethedevelopmentofNavajotribes.24．（8分）TheMarcheswereahappyfamily,Poverty,hardwork,andeventhefactthatFatherMarchwasawaywiththeUnionarmiescouldnotdownthespiritsofMeg,Jo,Beth,Amy,andMarmee,astheMarchgirlscalledtheirmother.TheMarchsisterstriedtobegoodbuthadtheirshareoffaults.PrettyMegwasoftendispleasedwiththeschoolchildrenshetaught;boyishJowaseasytobecomeangry;golden-hairedschoolgirlAmylikedtoshowup;butBeth,whokeptthehouse,waslovingandgentlealways.ThehappydayspassedanddarknesscamewhenatelegramarrivedforMrs.March.“Yourhusbandisveryill,”itsaid,“comeatonce.”Thegirltriedtobebravewhentheirmotherleftforthefront.Theywaitedandprayed.LittleBethgotscarletfever(猩紅熱)whenshewastakingcareofthesickneighbor.ShebecameveryillbutbegantorecoverbythetimeMarmeewasback.WhenFathercamehomefromthefrontandatthatjoyfulChristmasdinnertheywereoncemorealltogether.ThreeyearslatertheMarchgirlshadgrownintoyoungwomanhood.MegbecameMrs.Brooke,andafterafewfamilytroublesgotusedtohernewstatehappily.Johadfoundpleasureinherliteraryefforts.Amyhadgrownintoayoungladywithatalentfordesignandanevengreateroneforsociety.ButBethhadneverfullyregainedherhealth,andherfamilywatchedherwithloveandanxiety.AmywasaskedtogoandstayinEuropewitharelativeoftheMarches’.JowenttoNewYorkandbecamesuccessfulinherwritingandhadthesatisfactionofseeingherworkpublishedthere.ButathomethebitterestblowwasyettofallBethhadknownforsometimethatshecouldn’tlivemuchlongertobewiththefamilyandinthespringtimeshedied.NewscamefromEuropethatAmyandLaurie,thegrandsonofawealthyneighbor,hadplannedtobemarriedsoon.NowJobecameevermoresuccessfulinherwritingandgotmarriedtoProfessorBhaerandsoonafterwardsfoundedaschoolforboys.Andsothelittlewomenhadgrownupandlivedhappilywiththeirchildren,enjoyingtheharvestofloveandgoodnessthattheyhaddevotedalltheirlivesto.1、ThemembersoftheMarchfamilywereFatherMarch,Mrs.Marchandtheir.A．fivedaughtersB．fourdaughtersC．sonandfourdaughtersD．sonandfivedaughters2、Whichofthefollowingwouldbethebesttitleforthepassage?A．TheMarchFamilyB．TheMarchParentsC．TheMarchGirlsD．TheMarchRelatives3、ItcanbeinferredfromthepassagethattheMarchfamilyhad.A．moregirlsthanboysB．wealthyneighborsC．bothhappinessandsadnessD．a(chǎn)lotofrichrelatives25．（10分）“Thisway,everyone.”saidtheyoungBahamianasheledthewaytothehoar.Astheboatmovedoverthewaves,Ithoughtbackelevenyearstomyfirstislandvisitviaacruiseship.Aswelanded,Inoticedasignadvertisingswimmingwithdolphins.Ilookedatmymother;sheknewexactlywhatIwanted,butIwastooyoung.“Maybesomeothertime,”shesaid.Ithinkeveryoneknowsthatthosefourwordsusuallytranslatetonever.Itmademe,alittleboy,depressedformanydays.Fromthatdayon,itwasmydreamtoswimwiththosegentlecreatures.Now,after15minutesoftravelling,wereachedtheSanctuaryBay.Aswearrived,Isawthegraycreaturesshowingofftheiruniquetalentbeforemyeyes.Wewereledofftheboat,pastabackbuilding.Ourguidetolduswewouldhavethepleasureofspendingthenext90minuteswithKaholo,ayoungmale,andRobola,thelargestfemale,whoisquitefamousforhavingplayedtheleadinthefilmZeusandRoxanne.MyfatherandIwerejoinedbyfourothersandfollowedthemanoncemore.Hetoldustojumpintothewaterwhileheletthedolphinsintothatpartofthebay.Forthefirst20minutes,wecouldgoanywhereandtouchthedolphinsastheyswamby.KaholoandRobolamusthaveknownIwastheirbiggestfanbecausetheyswamtowardsmeasifIhadhadfish.Aftertheintroductoryperiod,theyjumpedoverourheads.IgotahugandkissfromRobola,andalsolearnedhowtohaveKaholotalktome.Thiswasbyfarthemostmagicalexperienceofmylife.Nexttimeyourparentssay“Maybesomeotherday”,havefaithinthem.Yourdreamsareimportanttothemtoo,andtheywilldowhatevertheycantomakeitpossible,becausedreamscancometrue.1、Whatwastheauthor’sdreamaccordingtothetext?A．Travellingwithhisparents.B．Swimmingwithdolphins.C．VisitingtheSanctuaryBay.D．Watchingafilmplayedbydolphins.2、Howdidtheauthorfeelafterthefirstislandvisit?A．Excited.B．Puzzled.C．Unhappy.D．Energetic.3、WhatdidKaholoandRoboladoduringthevisit?A．Theystayedawayfromtheauthor.B．Theylearnttohaveatalktotheauthor.C．Theyhadspecialinterestintheauthor’sfish.D．Theyshowedafriendlyattitudetowardstheauthor.4、What’sthebesttitleforthetext?A．DreamsDoComeTrueB．PlaywithDolphinsC．MyParents’PromiseD．TheFirstIslandVisit第三部分語言知識(shí)運(yùn)用（共兩節(jié)）第一節(jié)（每小題1.5分，滿分30分）閱讀下面短文，從短文后各題所給的A、B、C和D四個(gè)選項(xiàng)中，選出可以填入空白處的最佳選項(xiàng)．26．（30分）Thinkingofmygoodfriends,Isensethatmyattitudesaretotallydifferenttowardsmenandwomen.MyearliestchildhoodfriendisDonald.Inthestreetwasa(an)1oldGermantruck.Nowheels.Nodoors.Eachday,2wewereflyingovertheAtlanticinthattruckour“airplane”，therecamethatwonderfulmoment:“Engine3!”I’dshout,“We’llhavetojumpout.”Glancingatme，he’dsay,“Ican’t4!”“Fearnot!I’lldragyoutothe5.Andwhenweswam6thedust,Donaldcried“Sharks!”ButIalways7him.Thenextday,changing8，Donaldwoulddothesametome.Wesavedeachotherhundredsoftimes,butwhenmyfamilyreallydidleaveforAmerica,wecoulddo9.Wejustcriedsilentlyasthetrain10.Thesedays,Jessicaisoneofmybestfriends.RecentlywewereswimmingatabeachintheAtlantic,the11oneIhad“flown”overinmyGermantruckwithDonald.Wewerefarformshorewhenweboththoughtwe12ashark!Webeganswimming13towardtheshore.Althoughin14，Ifellbacktoprotecther.Intheend?the“shark”proved15，butnotmydeepemotionalfeelingformyfriend.Welookedintoeachother’seyesandsaid,“Iloveyou!”YouseewithwomenIcouldbe16，emotionallyhonestandtransparent.Withmalefriends,itseemedimpossibleto17caringfeelingshoweverdeepthefriendshipwas.“AmInormal?”Ithoughttomyself.Muchtomy18，researchesshowthatmenandwomenhaveverydifferent19andrational(理性的)processes.Idoloveallmyfriends-onlythemeansofexpression20.1、A．a(chǎn)dvancedB．decoratedC．a(chǎn)bandonedD．updated2、A．beforeB．whileC．a(chǎn)fterD．until3、A．lossB．deathC．pressureD．failure4、A．jumpB．swimC．dieD．run5、A．dustB．riverC．truckD．shore6、A．overB．throughC．a(chǎn)crossD．beyond7、A．leftB．fetchedC．rescuedD．defeated8、A．rolesB．mannersC．imagesD．forms9、A．somethingB．nothingC．a(chǎn)nythingD．everything10、A．brokedownB．movedinC．pulledawayD．blewup11、A．veryB．lastC．firstD．only12、A．a(chǎn)ttackedB．spottedC．a(chǎn)nnoyedD．killed13、A．eagerlyB．casuallyC．hardlyD．crazily14、A．panicB．hesitationC．doubtD．silence15、A．fierceB．friendlyC．imaginaryD．true16、A．coolB．shyC．passiveD．open17、A．expressB．hideC．a(chǎn)dmitD．control18、A．embarrassmentB．disappointmentC．reliefD．surprise19、A．emotionalB．physicalC．mentalD．moral20、A．changesB．developsC．mattersD．differs第二節(jié)（每小題1.5分，滿分15分）閱讀下面材料，在空白處填入1個(gè)適當(dāng)?shù)膯卧~或括號(hào)內(nèi)單詞的正確形式。27．（15分）Carryisafellowstudentofmine.Hesuffersfromcerebralpalsy（大腦性麻痹），whichmakesitalmostimpossibleforhimtocontrolhismovements.Asaresult,hespendshislifeinawheelchairandcannotwrite1．meansofapenorpencil.Andhespeakssoslowlyandstrangely2．ittakespatiencetounderstandwhatheissaying.This,togetherwithhisthin,twistedbodyandawkward3．(face)expressions,canoftencausepeopletotreathimasifhewereabackwardchild.However,behindhisphysical4．(appear),Carryisawarm,fun-loving,intelligentperson.Hismuscles5．(affect),nothismindorpersonality.Heenjoysthesamethinganystudentdoes---6．(listen)tomusic,meetingfriendsandsoon---andhenotisthebeststudentinourclass,butalsohas7．excellentsenseofhumourandagenuineinterestinotherpeople.Unabletoexpresshimself8．(easy)inconversation,heusesaspecialtypewritertowriteletterstohisfriends,andbeautiful9．(poem).Helivesaveryregularlife,studyingeverydayandneverallowing10．(he)tofallbehindinhisschoolwork.第四部分寫作（共兩節(jié)）第一節(jié)短文改錯(cuò)（滿分10分）28．（10分）假定英語課上老師要求同桌之間交換修改作文，請(qǐng)你修改你同桌寫的以下作文。文中共有10處語言錯(cuò)誤，每句中最多有兩處。每處錯(cuò)誤僅涉及一個(gè)單詞的增加、刪除或修改。增加：在缺詞處加一個(gè)漏字符號(hào)（∧），并在其下面寫出該加的詞。刪除：把多余的詞用斜線（\）劃掉。修改：在錯(cuò)的詞下劃一橫線，并在該詞下面寫出修改后的詞。注意：1、每處錯(cuò)誤及其修改均僅限一詞；2、只允許修改10處，多者（從第11處起）不計(jì)分。DearSir/Madam,I’mLiMing,themiddleschoolstudentfromChina、IreadtheannouncementofthesummercampthatyouhaveposteditontheInternetandIaminterestedinitIknowthatyouwelcomestudentfromdifferentcountriesbutI’dliketolakepartinit、I’vebeenstudiedEnglishfor10years,andIspeakfluentlyEnglish、What’smore,I’llbeabletotellstudentsfromanothercountriesaboutChinaandlearningabouttheircountriesaswell、IhopeIwillacceptedasamemberofyoursummercamp、I’llappreciateitthatyoucantakemyapplicationintoconsideration、Yours,LiMi第二節(jié)書面表達(dá)（滿分25分）29．（25分）假如你是李華，現(xiàn)在在英國觀光。今天，你在劍橋大學(xué)看到了共享單車并騎車游覽這個(gè)大學(xué)城。在100多年前自行車的發(fā)源地看到了中國