




版权说明:本文档由用户提供并上传,收益归属内容提供方,若内容存在侵权,请进行举报或认领
文档简介
2025届陕西省西安市西北大学附中英语高三上期末联考模拟试题注意事项:1.答卷前,考生务必将自己的姓名、准考证号填写在答题卡上。2.回答选择题时,选出每小题答案后,用铅笔把答题卡上对应题目的答案标号涂黑,如需改动,用橡皮擦干净后,再选涂其它答案标号。回答非选择题时,将答案写在答题卡上,写在本试卷上无效。3.考试结束后,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.—Wherecanweparkcar?—Don’tworry.There’ssuretobeparkinglotnearby.A.the;the B.the;aC.不填;a D.不填;the2.—HaveyouseenJiangWen’smovieLettheBulletsFlyrecently?—Yes.Iittwicelastweek,Athomeandinthetheatre.A.hadenjoyed B.enjoyed C.haveenjoyed D.wasenjoying3.Shemusthaverankedherbirthdaypresentsinorderof_becausethetoponeisherfavorite.A.value B.time C.interest D.preference4.Shedoesn’tspeakourlanguage,_____sheseemstounderstandwhatwesay.A.for B.and C.yet D.or5.—Whydidn’tyoutrytofinishthecomposition?—Itriedto,but________Icould,thebellranannouncingtheendoftheexamination.A.until B.whenC.after D.before6.Anyinformationoftheoraltestpaperareregardedasstrictly______beforeitisopen.A.conventional B.analyticalC.controversial D.confidential7.Whatactually______theaccidenthasnotyetbeendetermined.A.broughtout B.broughton C.broughtabout D.broughtup8.—Mum,wouldyoupleasebuymeanMP5player?—Ifyoucanhelpdosomehouseworkthewholevacation,you____haveoneasareward.A.must B.need C.would D.shall9.Afterhewaspromotedtothepresentposition,heisnotsohardworkingashe______.A.wasusedto B.usedtobe C.wasusedtobeing D.usedto10.Whydoesshealwaysdrivetowork____shecouldeasilytakethetrain?A.unless B.untilC.before D.when11.—WillittakemelongtogettotheSunshineHotel?—No,it______takeyoulong.It’snottherushhournow.A.shouldn’t B.shan’tC.mustn’t D.needn’t12.She________tosomeoneonthephone,soIjustnoddedtoherandwentaway.A.talked B.hastalkedC.hadtalked D.wastalking13.--Canyousparemeafewminutesnow?--______,butI’llbefreethisafternoon.A.I’mafraidnot B.I’mnotsureC.Yes,withpleasure D.No,Iwon’t14.Thecouplewasinitiallylookingforwardtohavinganoverseasweddingbuthadtodroptheideaafterfacing________fromparents.A.recognition B.tolerationC.opposition D.proportion15.Hewouldbeinbetterhealthnow_______withtoomuchworkwhenyoung.A.hadhenotburdenedhimself B.ifhewasnotburdenedC.werehenotburdened D.hadhenotbeenburdenedhimself16.______studentsshouldbegivenmorefreetimeissuggestedbymanyexpertsandwelcomedbykidsinschool.A.WhatB.WhyC.WhetherD.That17.TheladystandingovertheremaybefromtheUSA,_____Iguesshaslostherway.A.whom B.whoC.which D.where18.Acceptanceisnotaboutlikingasituation.Itisaboutacknowledgingallthathasbeenlostand________tolivewiththatloss.A.learning B.learnedC.tolearn D.havinglearned19.Thedaysaregonephysicalstrengthwasallyouneededtomakealiving.A.that B.whenC.where D.which20.Asisknown,itwasHuJintao,_______presidentofournation,whogave________lectureattheceremonyofNationalDayA.the;a B.the;/ C.a;the D./;a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)Myfriend,Jack,wasataxidriver.Webecamefriendsquitebyaccident.Fiveyearsago,ImadeatriptoChicago.ThemomentIsteppedintoacab,Irealizeditwasdifferent.Thefloorwascoveredwitharug(小地毯).ThereweresmallreproductionsofpaintingsbyVanGoghinsidethecab.Andthewindowswerespotless.ItoldthedriverIhadneverriddeninamoreattractivetaxi.“Iliketohearmypassengerssaythat,”hereplied.“Howlonghaveyoubeendecoratingyourcab?”Iasked.“It’snotmine,”hesaid.“It’sacompanycab.IhitupontheideayearsagowhenIworkedasaclean-upmanforthetaxicompany.Eachcarthatcameinattheendofthedaywaslikeagarbagepit.Cigarettebuttsandmatchescoveredthefloor.Stickystufflikepeanutbutterwasontheseatsordoorhandles.Ithoughtthatifthecompanyandthedriverswouldgivepeopleacarworthkeepingclean,theymightbemoreconsiderate.”“AssoonasIgotmytaxilicense,Itriedoutmyideas.Iputalotofextradecorationsintothecabtheygavemetodrive.Igotanicerugandsomeflowers.Wheneachpassengergotout,Icheckedtomakesurethateverythingwasinorderforthenextfare.Afteraboutamonthofmybringinginaspotlesscab,thebossreservedthesamecarformeeachday.ThatwaswhenIputupthereproductionsofgreatpaintings.”“I’veneverbeendisappointedbypeopleinthepasttenyears—nogarbage.LikeIsay,peopleappreciatebeautifulthings.Ifweplantedmoreflowersandtreesinthecityandmadethebuildingsmoreattractive,morepeoplewouldtendtokeepthecityclean.”Later,webecamegoodfriends.Iwasimpressedbythetaxi-driver,whohadhitonagreattruth—asenseofbeautycomeswiththegiftoflife.Mostpeopledon’thavetobeinstructedabouttherarityofbeauty.Theyrespondwhentheyfindit.And,iftheyaremadetofeelapartofit,theywilltrytoaddtoit.1、Whatmadethewritersurprisedwhenhegotintothetaxi?A.Thebeautifuldecorationontherug.B.Thestyleofdecorationoutsidethetaxi.C.Themasterpiecesofwell-knownpainters.D.Theimpressiveinnerenvironmentofthetaxi.2、Jackgottheideaofdecoratingthecabwhen_______.A.hegothistaxilicenseB.thebossreservedthesamecarforhimeachdayC.heservedasaclean-upmanforthetaxicompanyD.hefoundthetaxihecleanedwasfullofcigarettebutts3、Whatdoesthestorymainlytellus?A.Peoplecaneasilymakefriendswhentakingataxi.B.Whenpeoplefindbeautyinlife,theywilltrytoaddtoit.C.Ifweplantmoreflowersandtrees,wecankeepthecityclean.D.Wehavetobetaughttofindbeautyandmakeitmorebeautiful.22.(8分)InternationalExhibitionforAnimalHusbandry(畜牧业)&ProcessingofGrain,Fruits&VegetablesDate:11-13August,2015Place:London,EnglandRegistrationDeadline:30June,2015ExhibitionandMarketThemarketTheBritishagriculturalmarketprovidesverygoodchancesforinternationalcompaniessincethedemandformoderntechnologiesiscontinuouslyrising.Andtheexistingmarketcan'tsatisfythelocaldevelopment.Greatpotentialistobefoundalsoinlivestock(家畜)andlivestockfarming.Inparticular,investmentincattlefarmingandpighusbandryistobefurtherincreased.TheexhibitionItisthemostimportantplatformforanimalhusbandryandagriculturaltechnologyinBritain.Lastyear,537companiesfrom14countriesshowedtheiradvancedsolutionsforlivestock,animalhusbandryandagriculturaltechnologytoover13,540businessprofessionals.OrganizerLondonInternationalContractFairandIFWexpoHeidelbergGmbHHeidelberg,GermanyPhone:+49-(0)6221-1357-0Fax:+49-(0)6221-1357-23E-mailinfo@Openingtime11August-12August,2015,09:00-16:3013,August,2015,09:00-15:30MainIndustriesAgriculturalTechnology,CerealGrainTechnology,AnimalHusbandryMainTopicsEquipmentforsoilworkingandseed-bedpreparation●Harvestingequipment●Plantbreeding(繁殖)●Plantprotection●Grainprocessing●Storageandtransport●Animalbreeding●Animalhusbandry●Livestockhousing●FeedindustryEntrancefee2,000pounds/perstand/perday1、ThetexttellsusthefollowinginformationEXCEPI______.A.thetimeoftheexhibitionB.thetopicsoftheexhibitionC.therulesoftheexhibitionD.thesiteoftheexhibition2、Whichofthefollowingstatementsistrue?A.Londonhasthelargestagriculturalmarketintheworld.B.InternationalcompaniescanfindmorebusinessopportunitiesintheBritishagriculturalmarket.C.Almostallcountriesintheworldtakepartintheexhibition.D.Theexhibitioncoversallkindsoflivinggoods.3、Ifyouwanttotakepartintheexhibition,you______.A.cancontacttheorganizerinthreewaysB.mustregisterbetween30Juneand13August,2015C.havetobuysomeequipmentondisplayduringtheexhibitionD.neednotpaytheorganizeroftheexhibition23.(8分)Manyyouthswanttoleanhowtodrivecars.ThisyearonesixthofundergraduatesinBeijinghaveregisteredatdrivingschool.Thestudents,mostlyfrommajorssuchasbusinessmanagementorimitationaltrade,willfinishtheirdrivingcourseswithin20daysorso.Trainingcostshavedroppedto4,500yuanforstudents,accordingtotheHaidianDrivingSchoolinBeijing.Thepriceisnotreallylow,butstudentswillacceptit,seeingitasaninvestment(投资)intheirfuture.FamiliaritywiththeoperationofcomputersandfluentEnglisharethebasicskillsgraduatingstudentsneedtofindajob.Butadriverspermithasbecomeanotherfactor(因素).“Inthejobmarket,owningadriver’spermitsometimesstrengthensagraduatingstudent’scompetitivenessforagoodposition,”saysLiHua,anundergraduateattheChinaUniversityofPoliticalScienceandlaw.Carswillbecomeanecessarypartofmanypeople’slivesinthecomingyears,anditisdifficulttogetapermitoutofcampusbecauseofthepressuresonworkingpeople’stime.“Havingafull-timejobaftergraduationofferslimitedtimetolearntodrive.Weseniorstudentshaveplentyofsparetime,plentyofoppurtunitytolearn,”saysanotherundergraduateattheuniversity.WuDong,anofficialatthedrivingschool,saidundergraduateswereveryableandserious,andcouldgraspinanhourwhatordinarypeopletookfourhourstolearn.Inthisdrivingschool,middle-agedpeople,youngwomenandcollegestudentsarethemaincustomers.FromMarch1,2018,togetadriver’spermit,abeginnerisnowrequiredtohaveatleast86hours’practicebeforethefinalroadtest.1、Whydotheundergraduateslearntodrive?A.Theyarethestudentsfromspecialsubjectorcourse.B.Theyliketodrivecarsverymuch.C.Theywantybecomefulltimedriversaftergraduation.D.Theyneedthisskilltofindagoodjobinthefuture.2、WhatisWuDong’sopinionofstudentslearningtodrive?A.Itwouldmakethelifemoreinteresting.B.Youthswouldhaveanadvantageinlearningtodrive.C.Itisawasteofmoneyandtimetolearntodrive.D.Itwouldbebettertolearnitatcollegethanatwork.3、Togetthepermit,thestudent________.A.requiressometimetopracticebeforethefinalroadtestB.mustpaymoremoneybeforethefinalroadtestC.mustpracticemoretolearntodrivewhenhavingajobD.requirestolearnsomemoreothersubjectstodrive24.(8分)March1,2019DearResidentsRE.NOTICEOFCONSTRUCTION-SHORELINEEROSIONPROTECTIONSheetPileWall,RipRapProtection(抛石护岸)andSpotRepaironSASURoadbetweenChurchandJimmyRoad,TsawoutFirstNation.OurFile:CPMS6849BeginningApril1,2019,ourcommunity,TsawoutFirstNation,willbebeginningworkontheShorelineErosion(侵蚀)ProtectionprojectalongSASURoadbetweenChurchandJimmyRoad.WorkersemployedbyDonnMannExcavatingandTsawoutFirstNationPublicWorksDepartmentwillbeonsiteworkingfrom7:00amuntil5:00pmdailyMondaytoFridayuntilSeptember30,2019.PROJECTRELATEDINFORMATIONANDRECOMMENDATIONSTrafficDelays-Inordertosafelyandefficientlycompletethisconstructionitem,therewillbesomelane(车道)restrictions.Cardriversmustfollowthepolicesorders,slowdownthespeed,andpasstheconstructionareaextremelycautiously.Theconstructionitemmaycausetrafficdelays.Wewillmakeeveryefforttominimizeanypotentialinconvenienceandprovideyouwiththelatestnoticewhendisruptions(中断)mustoccur.Policeandemergencyvehicleaccesswillbemaintainedatalltimes.TruckTraffic-Attimesyouwillnoticeincreasedtrucktrafficintheconstructionarea.PleasebeawareanduseextracautionwhiledrivingVibration-Youmayexperiencesomevibrationathomeduringtheconstruction.Theshakymotionhappensduetotheworkbeingdone.Werecommendthatyouremoveorsecureobjectsonshelvesandwalls.ThisconstructionitemispartoftheTsawoutFirstNationShorelineErosionProtectionprojectthatwillbebeginninginApril2019andisexpectedtobecompletedbytheendof2019.Pleaseseeupcomingnewslettersandnoticesforfurtherupdates.ThankyouforyourpatienceandcooperationSincerelyRobMortinTsawoutFirstNation1、Howlongwilltheconstructionitemlast?A.bout4months.B.About5months.C.About6months.D.About7months.2、Whatdoyouknowabouttrafficregulationsduringtheconstruction?A.CardriversshallpassthroughtheconstructionareawithgreatcareB.OnlyemergencyvehiclescanpassthroughtheconstructionareaC.NovehiclewillbeallowedtopassthroughtheconstructionareaD.Allvehiclesshallbecheckedbeforeenteringtheconstructionarea.3、ItisrecommendedthatnearbyresidentsshouldA.avoiddrivingtheirvehiclesintherush-hoursB.makesurethattheirwallsareingoodconditionC.updateupcomingnewslettersandnoticesdailyD.havetheirphotoframestakendownfromthewalls25.(10分)Iattendedapartyonenight.Duringthedinneramantoldahumorousstorybasedonthequotation:"There'sadivinitythatshapesourends,rough-hewthemhowwewill.”ThestorytellermentionedthatthequotationwasfromtheBible.Iknewhewaswrong.Therecouldn'tbetheslightestdoubtaboutit.Togetafeelingofimportanceanddisplaymysuperiority,Iappointedmyselfasanunwelcomecommitteemembertocorrecthim.Hestucktohisguns."What?FromShakespeare?Impossible!Absurd!ThatquotationwasfromtheBible.”Andheknewit.Thestorytellerwassittingonmyright;andFrankGammond,anoldfriendofmine,wasseatedonmyleft.Mr.GammondhaddevotedyearstothestudyofShakespeare.SothestorytellerandIagreedtosubmitthequestiontoMr.Gammond.Mr.Gammondlistened,kickedmeunderthetable,andthensaid,"Dale,youarewrong.Thegentlemanisright.ItisfromtheBible."Onourwayhomethatnight,IsaidtoMr.Gammond,“Frank,youknewthatquotationwasfromShakespeare."Yes,ofcourse,"hereplied,“Hamlet,ActFive,SceneTwo.Butwewereguestsatahappytime,mydearDale.Whyarguewiththestoryteller?Whyprovetohimheiswrong?Whynotlethimsavehisface?Alwaysavoidyoursharpangle."IlearnedalessonI'llneverforget.Inotonlyhadmadethestorytelleruncomfortable,butalsohadputmyfriendinanembarrassingsituation.HowmuchbetteritwouldhavebeenhadInotbecomeargumentative.Ninetimesoutoften,anargumentendswitheachofthecontestantsmorefirmlyconvincedthaneverthatheisabsolutelyright.Youcan'twinanargument.Youcan'tbecauseifyouloseit,youloseit;andifyouwinit,youloseit1、Whatdidtheauthordotogetafeelingofimportanceattheparty?A.Tellahumorousstory. B.Showoffhisrichknowledge.C.Teachthestorytelleralesson. D.Correctthestoryteller'smistake.2、.WhydidFrankGammondkicktheauthorunderthetable?A.Becausehedidn'tknowmuchabouttheBible.B.Becausehethoughttheauthorwasreallywrong.C.Becausehewasthoughtfulandwantedtostoptheauthor.D.Becausehewashumorousandplayedtricksontheauthor.3、Howdidtheauthorfeelabouttheeventthathappenedattheparty?A.Thankful. B.Regretful.C.Satisfied, D.Confused.4、Whatcanbethesuitabletitleforthepassage?A.YouCan'tWinanArgument B.YouCan'tMakeMistakesinPublicC.DoHaveanOpenMind D.MindYourMannersataParty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)Humangrowthisaprocessofexperimentation,trial,anderroreventuallyleadingtowisdom.Eachtimeyouchoosetotrustyourselfandtakeaction,youcanneverquitebecertainhowthesituationwill
1.Sometimesyouarevictorious,andsometimesyoubecomedisappointed.The
2experiments,however,arenolessvaluablethantheexperimentsthatfinallyprovesuccessful;infact,you
3learnmorefromyour“failures”thanyoudofromyour
4.Ifyouhavemadewhatyouthinktobeamistakeorfailedtoliveuptoyourown
5,youwillmostlikelyputupabarrierbetweenyouressenceandthepartofyourthatisthealleged(声称的)wrong-doer.However,viewingpastactionsas
6impliesguiltandblame,anditisnotpossibletolearnanythingmeaningfulwhileyouareengagedinblaming.
7,forgivenessisrequiredwhenyouareseverelyjudgingyourself.Forgivenessistheactoferasingan
8debt.Therearefourkindsofforgiveness.Thefirstisbeginnerforgivenessforyourself.Thesecondofforgivenessisbeginnerforgivenessforanother.Thethirdkindofforgivenessis
9forgivenessofyourself.Thisisforseriousmisbehaviors,theonesyoucarrywithdeep
10.Whenyoudosomethingthatviolatesyourownvaluesandprinciples,youcreateagapbetweenyourstandardsandyouractual
11.Insuchacase,youneedtoworkveryhardat
12yourselfforthesedeedssothatyoucanclosethisgap.Thisdoesnot
13thatyoushouldrushtoforgiveyourselforshouldn’tfeelregret,
14takingpleasureinthesefeelingsforaprolongedperiodoftimeisnothealthy.The
15andperhapsmostdifficultoneoftheadvancedforgivenessofanother.Atsometimeofourlife,youmayhavebeenseverelywrongedorhurtbyanotherpersontosuchadegreethatforgivenessseems
16.However,harboringangerandrevengefantasiesonlykeepsyou
17invictimhood.Undersuchacircumstance,youshouldforceyourselftoseethebiggerpicture.Bysodoing,youwillbeableto
18thefocusawayfromtheangerandresentment.Itisonlythroughforgivenessthatyoucanerasewrongdoingand
19thememory.Whenyoucan
20releasethesituation,youmaycometoseeitasanecessarypartofyourgrowth.1、A.turnout B.turnup C.breakup D.breakout2、A.important B.engaged C.failed D.successful3、A.obviously B.necessarily C.continuously D.usually4、A.success B.failure C.fault D.benefit5、A.ability B.expectations C.belief D.experiences6、A.mistakes B.victories C.experiments D.fantasies7、A.Still B.Therefore C.Instead D.However8、A.absurd B.original C.emotional D.unusual9、A.ordinary B.advanced C.alternative D.certain10、A.wisdom B.mercy C.injury D.shame11、A.thought B.approach C.behavior D.purpose12、A.punishing B.forgiving C.blaming D.praising13、A.mean B.prove C.reflect D.represent14、A.and B.or C.but D.so15、A.uncertain B.premier C.next D.last16、A.essential B.valuable C.impossible D.unavoidable17、A.trapped B.located C.lost D.occupied18、A.drive B.drag C.put D.shift19、A.keep B.refresh C.weaken D.clean20、A.naturally B.finally C.definitely D.initially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)Therehasbeenarecenttrendinthefoodserviceindustrytowardlowerfatcontentandlesssalt.Thistrend,whichwasstartedbythemedicalcommunity(医学界)1.amethodoffightingheartdisease,hashadsomeunintendedside2.(effect)suchasoverweightandheartdisease—theverythingthemedicalcommunitywastryingtofight.Fatandsaltareveryimportantpartsofadiet.Theyarerequired3.(process)thefoodthatweeat,torecoverfrominjuryandforseveralotherbodilyfunctions.Whenfatandsalt4.(remove)fromfood,thefoodtastesasifismissingsomething.As5.result,peoplewilleatmorefoodtotrytomakeupforthatsomethingmissing.Even6.(bad),theamountoffastfoodthatpeopleeatgoesup.Fastfood7.(be)fulloffatandsalt;by8.(eat)morefastfoodpeoplewillgetmoresaltandfatthantheyneedintheirdiet.Havingenoughfatandsaltinyourmealswillreducetheurgetosnack(吃点心)betweenmealsandwillimprovethetasteofyourfood.However,be9.(care)nottogotoextremes.Likeanything,itispossibletohavetoomuchofboth,10.isnotgoodforthehealth.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、删除或修改。增加:在缺词处加上一个漏字符号(^),并在其下面写出该加的词。删除:把多余的词用斜线(\)划掉。修改:在错的词下划一横线,并在该词下面写出修改后的词。注意:1、每处错误及其修改均仅限一词;2、只允许修改10处,多者(从第11处起)不计分。Iwasangryabouttheactofdishonestyintheexams.I'mnotsayingthatI'magoodstudentorI'venevercheated、Ioncewrotetheanswerinmyhandforahistorytestbut,unlucky,wascaughtbymyteacher.Becauseshewasoneofmymostfavorites,therewerenowordstodescribehowsorry.Ifeltatonce.Ithoughtcheatwouldhelpmekeep
温馨提示
- 1. 本站所有资源如无特殊说明,都需要本地电脑安装OFFICE2007和PDF阅读器。图纸软件为CAD,CAXA,PROE,UG,SolidWorks等.压缩文件请下载最新的WinRAR软件解压。
- 2. 本站的文档不包含任何第三方提供的附件图纸等,如果需要附件,请联系上传者。文件的所有权益归上传用户所有。
- 3. 本站RAR压缩包中若带图纸,网页内容里面会有图纸预览,若没有图纸预览就没有图纸。
- 4. 未经权益所有人同意不得将文件中的内容挪作商业或盈利用途。
- 5. 人人文库网仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对用户上传分享的文档内容本身不做任何修改或编辑,并不能对任何下载内容负责。
- 6. 下载文件中如有侵权或不适当内容,请与我们联系,我们立即纠正。
- 7. 本站不保证下载资源的准确性、安全性和完整性, 同时也不承担用户因使用这些下载资源对自己和他人造成任何形式的伤害或损失。
最新文档
- 地方诊所病历管理制度
- 员工外派进修管理制度
- 夜间人员值班管理制度
- 大众浴池员工管理制度
- 夜间值班干部管理制度
- 外贸商务公司管理制度
- 农村生活污水治理攻坚建设项目实施方案
- 2025股权激励法律业务委托合同范文
- 2025劳动局劳动合同范本
- 2025合同样本轿车买卖合同个人模板
- 人教版七年级下册生物期末试卷
- GB 12476.2-2006可燃性粉尘环境用电气设备第1部分:用外壳和限制表面温度保护的电气设备第2节:电气设备的选择、安装和维护
- 注塑行业MES系统解决方案
- 国家开放大学《金融法规》章节自测练习参考答案
- 《言语治疗技术》考试复习题库(含答案)
- 外墙体抹灰工艺技术控制方框图
- 国军标体系之公司质量目标(重要)
- DCS系统调试步骤
- JJF(津) 54-2021 液体流量计在线校准规范
- 关于进一步厉行节约推行无纸化办公的通知
- 职业生涯规划外文翻译文献
评论
0/150
提交评论