陜西省度西安中學(xué)2024學(xué)年高三第一次診斷性測(cè)試英語(yǔ)試題含解析

陜西省度西安中學(xué)2024學(xué)年高三第一次診斷性測(cè)試英語(yǔ)試題注意事項(xiàng)：1．答題前，考生先將自己的姓名、準(zhǔn)考證號(hào)填寫清楚，將條形碼準(zhǔn)確粘貼在考生信息條形碼粘貼區(qū)。2．選擇題必須使用2B鉛筆填涂；非選擇題必須使用0．5毫米黑色字跡的簽字筆書寫，字體工整、筆跡清楚。3．請(qǐng)按照題號(hào)順序在各題目的答題區(qū)域內(nèi)作答，超出答題區(qū)域書寫的答案無(wú)效；在草稿紙、試題卷上答題無(wú)效。4．保持卡面清潔，不要折疊，不要弄破、弄皺，不準(zhǔn)使用涂改液、修正帶、刮紙刀。第一部分（共20小題，每小題1.5分，滿分30分）1．---CanyoucomeonMondayofTuesday？---I'mafraid__________dayispossible.A．either B．neitherC．some D．a(chǎn)ny2．Annsaidwheneverherfatherwasunhappyhe________gooutandbuysomething,usuallysomethinglargeanduseless.A．should B．couldC．would D．might3．Thiscarisimportanttoourfamily.Wewouldrepairitatourexpense_______itbreakdownwithinthefirstyear.A．could B．wouldC．might D．should4．—I’mtiredout.Ican’trunanyfurther,Tom.—________!Mike.I’msureyoucandoit.A．Comeon B．NohurryC．Noproblem D．Welldone5．Childrenexposedtoairpollutionaremoretosufferingfromdifferentdiseases.A．possible B．probable C．likely D．certainly6．LeadersofmanycountrieshavebeentryingtowhatitisthatmakesChinadevelopsofastinrecentyears.A．carryout B．figureoutC．watchout D．makeout7．Itsagoodideatogetstudentstoretellastorytheirownwords．A．of B．in C．by D．through8．Tomissocreativeapersonthathealwayshaslotsof_________ideasinhismind,andsometimeswedon’tevenknowwhatheisthinkingabout.A．meanB．novelC．slimD．instant9．Aproblemhasoccurredweshoulddevelopinnovativethinkingabilitiesintheclassroomsbygivingstudentsopportunitiestogeneratenewideas.A．whatB．whereC．whetherD．that10．Weshouldbearinmindthatsocialdevelopmentandbalanceofnatureshouldgoin.A．company B．sympathy C．a(chǎn)ssociation D．harmony11．Insomecountries,peopleeatwithchopsticks,whilein________,knivesandforks.A．a(chǎn)nother B．otherC．others D．theother12．---Mom,Ihavepassedtheadmissionexaminations!---______!A．GoodforyouB．GoodluckC．CheerupD．Goahead13．Astothe“996workschedule”,______employeesworkfrom9amto9pm,6daysaweek,People’sDailycommentedthatvaluinghardworkdoesnotmeanforcingemployeestoworkovertime.A．that B．which C．where D．when14．Thisfilmisverywithyoungpeople,whichtellsareallyromanticstory.A．familiarB．popularC．similarD．particular15．Ellenisafantasticdancer.IwishI________aswellasher.A．dance B．willdanceC．haddanced D．danced16．WithMother'sDayaroundthecorner，Ihavetakensomemoneyoutofthebank_____________presentsformymother.A．buy B．tobuyC．buying D．havingbought17．helawisequallyappliedtoeveryone.Noone_______beaboveit.A．shall B．mustC．may D．need18．—BoB．couldIuseyourcomputerthisevening?—Sorry.Iareportonitthen.A．willbewriting B．havebeenwritingC．havewritten D．willhavewritten19．Everymanhashisfaults.Weshould,therefore,leantobe________ofothers.A．ignorant B．responsibleC．reliable D．tolerant20．Thedoctor’sdilemmawas_____heshouldtellthepatientthetruth.A．whether B．whichC．that D．what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）Onthedaythetornadohit,therewasnoindicationsevereweatherwasonitsway—theskywasblueandthesunhadbeenout.Thefirstwarningmyhusband,JimmyandIgotcamearound9p.m.,fromsomescrollingtextontheTVJimmywaswatching.Nosoonerhadwefoundcoverageofthetornadothanitwasontopofus.Ididn’tknowhoworifwewouldmakeitdownthesteps.Itfeltasiftherewerenofloorunderneathmeasthewindliftedmeoffmyfeet.Igrippedthebanister(樓梯扶手)andtriedtomoveforward,butthisintensepressureheldmeinplace.Inthosesecondsofpracticalstillness,Icouldheareverythingaroundmerattling.Wegotclosetothestaircaselandingonlytoheartheloudripping（撕裂）soundofourgaragedoorcomingoff.Thebackwallofthehousefollowedsuitandtoreoffintothedarknessoutside.BythetimeIreachedthecloset,thetornadohadbeenoverusforaboutaminute.Jimmypushedmedowntotheclosetfloor,buthecouldn’tgetinsidehimselfbecauseofthewind.IheldJimmy’sarmtightlyasthetornadosuckedthedooropen—weneverdidgetitfullyshut—andtriedtobringJimmywithit.Mykneesandheadwerefullofglass,butinthatmoment,Ifeltnopain.IfIhadletgo,Jimmywouldhaveflownrightoutthebackofthehouseandintothebay.“Holdon!Holdon!”heyelled.Buttherewasnothinginthisclosettoholdonto.Allofasudden,Jimmyliftedoffhisfeetlikepeopleintornadoesdointhemovies.Ithoughthewasgone.Andtheneverythingstopped.Helandedonhisfeet.Inthosefirstquietmoments,Icouldn’tbelieveitwasover.Jimmysaidhe’dgooutsidetocheck.“No,”Isaid.“Don’tleaveme.Don’tleaveme.”1、Whatdoestheunderlinedwordcoveragemean?A．damageB．reportsC．a(chǎn)rrivalD．delay2、Inthelastbuttwoparagraphs,whydidtheauthorfeelnopain?A．Becauseshewastooeagertohelpherhusbandtofeelit.B．Becauseshewasfrozeninamazement.C．Becauseshewasheldentirelybythepoweroftornado.D．Becauseshewasfrightenedbythedamagecausedbythedisaster.3、Thefeelingoftheauthorduringthedisastercanbedescribedas_______A．scared,surprisedbutcalmB．surprised,terrifiedbutdeterminedC．a(chǎn)stonished,confusedandmovedD．a(chǎn)mazed,determinedandgrateful22．（8分）FiveweeksagoIhadtotalhipreplacementsurgery(髖關(guān)節(jié)置換手術(shù)).InCanada,wehaveagreathealthcaresystem.Thatmeanswegetournewhipsforfree.MyhiphadbeenhurtingmeforyearsbeforeIwenttothedoctor.Ofcourse,itwasfree.Shereferredmetoasurgeon,buttheearliestappointmentwasin10months.Thatiswhatbeingfreegetsyou.Tenmonthslater,aftersomefreeX-rays,thesurgeontoldmeIneededsurgery,whichwasaboutan18-monthwait,forsomeseniorcitizenshadbeenontheoperationlist.Another18months!Idraggedmyselfoutofthesurgeon’soffice.Walkingthroughthehospital,Ithoughtaboutthesituation.Asthebreadwinnerofalargefamily,Icouldn’twaitthatlong,soIhadtogettothefrontline.IwasfullyawareofwhataCanadianshouldbelike(Canadiansareusuallyconsideredgentleandca-ring),butthistimeIreallyneededtofightformyself.Atthatverymoment,intheshopwindowofthehospital,Isawasignwhichread,“VolunteersNeeded.”Suddenly,anideaoccurredtome—Iwouldgetthejob.Fortunately,theysignedmeupimmediatelybecausetheaverageageofthevolunteersattheshopwas75.Theyweredesperateforsomeyoungblood.EveryFridaymorning,Iwasattheshop.Whileseeingthehospitalstaff,I’dcasuallybeasked,Whatdoyoudo?Thenldtellthem,Well,lmgettingmyhipreplaced—in18months.It’sgoingtobesogreatwhenthepainstops.Soon,allthestaffgottoknowme.Naturally,inmynextappointment,thesurgeonrecognizedme.Momentslater,Ihadasurgerydatejustweeksaway.Ihadtosayitwasactuallymyvolunteeringthatgotmetothefrontoftheline.AndI’mnotashamedofit,forIintendtostickwiththevolunteering.Also,evenwhenIcheatedthesystem,Ididitinawaythatbenefitssociety.1、Whatcanweinferfromthesecondparagraph?A．Shefeltratherdisappointed.B．Shecouldn’twalkbecauseofthepain.C．Shewastooscaredtohavethesurgery.D．Shedidn’tbelievewhatthesurgeonsaid.2、Whydidthewriterdecidetobeavolunteer?A．Todonatebloodtothehospital.B．Togethernewhipfreeofcharge.C．Toreceivesometinygiftsfromothers.D．Toapproachthedoctorforearlysurgery.3、Whatdidtheauthorthinkofhercheat?A．Itwasashame.B．Itwasapride.C．Itwasbeneficial.D．Itwasafairdeal.4、Whichcanbethebesttitleforthetext?A．HowIGotMyNewHipB．TheDoctorWhoSavedMyLifeC．HowtoBeaVolunteerinHospitalD．TheProblemofCanada’sHealthcareSystem23．（8分）Childrenallovertheworldwhohavetriedthepotatoorlemonbatteryexperimentsknowthatanelectricalcurrentcanbegeneratedbycreatingareactionbetweenthefoodandtwodifferentmetals.However,researchersattheMassachusettsInstituteofTechnologyhavefoundawaytoharvestpowerfromtrees.Theyusethesamemetalforbothelectrodes(電極)specificallyinordernottoconfusethiseffectwiththepotatoeffect.Whileprovingthattreescanprovideasourceofpowerisasignificantstep,akeyquestionremains:canthetinyvoltage(電壓)producedbyatreebeusedforanythinguseful?Nowscientistsaredebatingoverhowtousethispowersourceforhumanbenefits.Themostpracticalthingisfirealarmforforestdepartment,originatingfromthetreeitself.Treeselectricpowercanchargeabattery.Thisbatteryinturnwillbeconnectedtoasmallsensor.Thissensorwillpowerabriefradiotransmission(傳送).Thatradiosignalwilltransportdailysoilandairconditionmeasurementstoanetworkofmuchlarger,solarpoweredForest-Serviceenvironmentalmonitoringstations.Thosesensorswiltalsogiveoutacrisissignalintheeventofasuddenrisein-airtemperature-thatmightindicatetheoutbreakofaforestfire.“Itrulybelieveithaspotential,”saidVictoriaHenderson,branchchiefforequipmentandchemicalsattheForestServicedNationalInteragencyFireCenter.“Ifthiscanenhance(提高)ourexistingtechnologytoadegreethatwouldgainusalotmorefireprotection,thenwe’dlookataplantopurchaseitforournationwideinfrastructure(基礎(chǔ)設(shè)施),whichishuge.”ResearchershavediscoveredthatthegreaterthepHdifferencebetweenthetreeandthesoilthemoretheenergywillbeproduced.Someresearchersalsoadmitthat“treepower”isn’taspracticalassolarenergy,butbelievethatthesystemcouldbescaled-upasalow-costoptionforpoweringtreesensorsthathelpdetectenvironmentalconditionsorforestfires,Usingtheelectronicoutputtokeeptrackofatree’shealthisanotherpossibility.1、Whydoestheauthormentionthepotatobatteryexperimentinthefirstparagraph?A．Toexplainwhatitis.B．Tostresstheimportanceofelectricity.C．Tointroducethepowersourcefromtrees.D．Toencouragepeopletotrythisexperiment.2、Whatdoweknowaboutthefirealarmmentionedinthethirdparagraph?A．Thefirealarmcanmakeaveryloudsound.B．Smokefromafirecancausethealarmtogooff.C．Theelectricpoweritneedscomesfromthetree.D．Ithasbeenwidelyusedintheforestdepartment.3、What’sVictoriaHenderson’sattitudetowardsthefirealarmsystem?A．Cautious.B．Favorable.C．Disapproving.D．Unconcerned,4、Whatcausestreestocreateelectricalcurrents?A．Thesensorimplantedinthetree.B．Thenewwayadoptedbytheresearchers.C．Thespecialmetalusedinthebatteryexperiment.D．ThepHdifferencebetweenthesoilandthetrees.24．（8分）AprimaryschoolinJinhua,ZhejiangProvincehasannounceditnolongerrequiresparentstosigntheirchildren’shomework,whichwasaimedatgettingparentstosupervise(監(jiān)督)theirchildrenafterschool.ChinaYouthDailycomments:Puttinganendtotherequirementthatparentssignoffonthehomeworkoftheirchildreneasestheburdenonmanyparents,asotherwisetheywouldhavetodoprimaryschoolhomeworkafterahardday’swork.Butthereareworriesthatifparentsstophavingtosignoffontheirchildren’shomework,thechildrenwillnotgetgoodgrades.However,themosteffectivewayforchildrentostudyistodeveloptheirwillingnesstolearnanddotheirownstudies.Whendoinghomework,studentspracticeandhopefullyapplywhattheyhavelearned.Itistruethatteachersaresupposedtocheckstudents’homeworkandidentifytheirmistakes.Butsomeparentscorrecttheirchildren’smistakesbythemselveswhensigningoffonit.Itisthedutyofstudentstodotheirhomework,beresponsiblefortheirstudiesandcorrecttheirmistakes.Parents’supervisingtheirhomework,checkingtheiranswersanddealingwiththeharderproblemswillonlymakechildrenlessawareoftheirmistakesandencouragethemtowaitfortheirparents’helpwhentheyfaceanyproblems.Childrenhavetomanagetheirownlearninganddeveloptheabilitytostudybythemselves,ascompetencewillnotbeachievedifastudentsimplyrepeatsstricttasksinwhichheisassistedinschoolbyteachersandathomebyparents.AdelayedsatisfactionexperimentconductedbyWalterMischelinthe1960sprovedthatchildrenwithbetterself-discipline(自律)performedbetterintheirstudiesandinterpersonalrelationships.Thereislittledoubtthatparents’supervisioncanmakechildren’shomeworkbetter.Butitdoesnotgivechildrenthechancetopracticetheirabilitytosolveproblemsindependently.1、Whydoestheauthormentiontheprimaryschool’sannouncementinthefirstparagraph?A．Toexpresshisdoubts.B．Tointroducethetopic.C．Topresentanargument.D．Toclarifyhiswritingpurpose.2、Intheauthor’sopinion,stoppingsigningkids’homeworkmainlyaimsto__________.A．easetheburdenonmanyparents.B．helpchildrengetgoodgrades.C．increasethekids’awarenessofbeingresponsiblefortheirstudies.D．shift(轉(zhuǎn)移)theresponsibilityofsupervisingkids’homeworkontoteachers.3、Whichofthefollowingcanbeaneffectcausedbyparents’stoppingsigningoff?A．Children’sgradeswillabsolutelydecrease.B．Childrenwillloseconfidencewhenfacinganyproblems.C．Childrenwillsimplyrepeatrigidtaskssoastopracticethemselves.D．Childrenwilltrytodealwiththeirproblemsandmistakesbythemselves.4、Whatistheauthor’sattitudetoparents’stoppingsigningkids’homework?A．Supportive.B．Indifferent.C．Neutral.D．Opposed25．（10分）Itwasathercompany’sannualpicnicthatmymothermetmyfather,andhewalkedherhome.Thenextweek,fromhishomeinChicago,hesentherapostcard:Remembermeplease.Dobecallingyouoneofthesedays.—David.Shestillhasthatpostcard.Iamnotsurewhatmadehersave.Thoughhealreadyhadhisheartsetonher,shehadn'tchosenhimyet,atleastnotconsciously.Myfather,asalesmanforabigelectronicscompany,oftentolduswhileweweregrowingup,itwasblindluckthathewasatthepicnicthatday.HewasintowntomeetwithclientsandhappenedtostopbythebranchofficethatSaturdaymorningtomakeacall.Itwasthemanagerofalocalradiostationwheremymotherworkedasawriter.“Dave!Gladyou’reintown!”hesaid,andinvitedhimtocomerightovertotheirannualpicnic.Latermymotherdatedhimwhenhewasintown.Eventually,onenightafewmonthslater,shewokehermotherandtoldhershewasgoingtomarryDave.Afewmonthsafterthewedding,myfatherwastransferredeast.TheysettledinNewYork,inthehousewhereIgrewup.SometimesIthinkhowtimegetsustogetherandputsusinacertainplacewherewe’refacedwithoneoptionoranother.Weleavebehindwhileotherslivebythechoicewemade.Wecouldhavelivedfullofdifferentpassionsandjoys,differentproblemsanddisappointments.Sometimes,particularlywhenIcamehomelatetoasleepinghouse,myhusbandanddaughtercurledaroundeachother.Ithinkabouttheliveswewouldnothavehadifchoiceshadbroughtustoadifferentplace.AndItrembleatthethoughtthatImighthavemissedthislife,thisman,thischild,thislove.1、Accordingtothetext,wheredidtheauthor’sparentscomeacross?A．Attheauthor’shome.B．Atalocalradiostation.C．Atherfather’scompany’spicnic.D．Athermother’scompany’spicnic.2、Itcanbeinferredfromthetextthat________.A．theauthor’sfatherdidn’tlikehermotherB．theauthor’smotheralwaysmaderightdecisionsC．theauthordidn’tbelievehermotherD．theauthor’smotherhadn’tdecidedtomarryherfatheratfirst3、Beforemeetingtheauthor'sfather,hermotherwas________.A．a(chǎn)writerB．a(chǎn)managerC．a(chǎn)teacherD．a(chǎn)saleswoman4、Whatdoweknowabouttheauthor?A．Shevaluesherlifenow.B．Timemakesherlifenowperfect.C．Sheistiredofherlifenow.D．Herlifenowfacesproblemsanddisappointments.第三部分語(yǔ)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）Trueleadershipisnotjusttheabilitytoidentifythetalentandskillofthepolishedindividualsaroundyou.Itinvolvesbeingabletodigbeneaththesurfaceanddiscover1．Oncetherewasaboywhoconstantlysatandtalkedinhismathclass，andseemed2ingroupactivities.Mostteacherswould3thinkofhimasaproblemstudent.However，Annawasdifferent.Shebelievedthestudentwasabove4inotherareassoshecreatedastrategytofindout.Annadidn’t’t5theparents.Insteadsheorganizedahandfulofactivitiesintheclasstogetmoreinformation.Inplaceofcallingoutforvolunteersinclassshecreateda6foreachFriday：Girlsvs.Boys.Thefirstweektheclasswastotally7．Everyonewantedtowin.Eventheboyhadhishandupthewholetimetryingtogetaturn.8，Annawaited，andwaited，andwaited.Finallythe9teacherpairedtheboywiththemost10girlstudentinclass.Nowthetwoteamshada11score，allthestudentssatbackeagertoseetheresult.Astheteacherplacedthequestionontheboard，mostofthestudentsbeganto12theirheads：thiswasaquestiontheyhadnever13inclass.“14！”theteacheryelled.Bothstudentsstarteddoingit15thinkingofhowtosolvethecomplexquestion.Theirclassmates，fullof16，exclaimed，“Hurry，hurry，hurry！”Theboyfinisheditjustsecondsbeforethegirlandspunaroundwithhis17raised，“Iwon！”AlmostnobodycouldbelievethestudenttheyadmiredfaileduntilAnna18theresult.ThiswaswhatAnnatriedtoget.Itturnedoutthatthestudentwasn’tbad，hewas19．Sowecanseethat20hiddenabilitiesisnotalwayseasybuttheendresultscanbemagical.Tryyourhandatthisqualityofleadershipnowandreportyourresults.1、A．truth B．treasure C．motivation D．potential2、A．a(chǎn)ctive B．disconnected C．discouraged D．cautious3、A．immediately B．a(chǎn)ppropriately C．a(chǎn)bnormally D．scarcely4、A．limit B．prejudice C．a(chǎn)verage D．value5、A．contact B．comfort C．warn D．blame6、A．dilemma B．debate C．game D．competition7、A．creative B．enthusiastic C．noisy D．curious8、A．Yet B．Still C．Somehow D．Therefore9、A．a(chǎn)rbitrary B．puzzled C．ridiculous D．wise10、A．elegant B．careless C．hardworking D．considerate11、A．rare B．close C．poor D．different12、A．turn B．lift C．shake D．nod13、A．covered B．feared C．overlooked D．raised14、A．Try B．Hurry C．Look D．Go15、A．skillfully B．slowly C．casually D．a(chǎn)bruptly16、A．chaos B．a(chǎn)nxiety C．courage D．excitement17、A．a(chǎn)rms B．hopes C．confidence D．eyes18、A．obtained B．a(chǎn)nalyzed C．confirmed D．a(chǎn)djusted19、A．upset B．spoiled C．tired D．bored20、A．foreseeing B．recognizing C．a(chǎn)ppreciating D．a(chǎn)ssessing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）TheLanguageofLoveMusicisauniversallanguage,whichhasthemostpowerfulmagicintheworld.Musicisasweetlanguagetoshowlovetothosewholoveusandthosewho1．(love)byus.Musicisalsoafriendlylanguageforunfamiliarpeopletoshowkindness.Itislivingeverywhereandallthetimeinourdailylife.Ilearnedthiswhile2．(take)careofaseagullunfortunateenoughtoswallowahook.Aftercallingthewildliferescuecenterandlearningthatallits3．(vehicle)wereoutonotherbusiness,Icarefully4．(wrap)(裹住)thewildbirdinatowelandcarriedhimtomyfriend’scar.Theonlyway5．(keep)himcalmwasbysinging.For30minutes,Isang6．(soft)tothesmallcreatureuntilfinallydelivering(遞送)him7．thosewhocouldhelp.I’mnotcertain8．happenedafterwards,butforthatbriefperiod,wetwovastlydifferentspeciesconnected,bridging9．gapbetweenusthroughsongs.10．doesn’tmatterwhethertherewillbedifficultiesincommunication，forloveisalwaysthethemeofeachpieceofmusic.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(yǔ)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(yǔ)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)的詞下面一橫線，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。Lastyear,IwenttoAustraliaorashort-termstudylikeaninternationalstudent.OneofmyclassmatessuggestedwesharedourfavoriterecipesforfoodsfromourowncountriesduringNewYear’sparty.Weallagreedtothiswonderfulideacookedmyuniquedishesfortheparty.HariyatifromIndonesiasharedakindofcookiewhatwasshapedlikeelephantears.SusanfromSouthAfricapreparedsomesweetdumplingspackedinseveralbananaleaf.ChiemifromJapancookedspecialriceballsmixingwithfish.AndIwasservedDaoxiaonoodles,myhometown—Shanxi’slocalfood.Thesevariouslyfoodswerealldelicious.Therefore,myfavoritewasstillChinesefood.第二節(jié)書面表達(dá)（滿分25分）29．（25分）假定你是李華，本周日你爸爸計(jì)劃組織一場(chǎng)家庭聚會(huì)。請(qǐng)你寫封郵件給外教Steven，遨請(qǐng)他來(lái)你家一起參加。主要內(nèi)容如下：1.聚會(huì)時(shí)間和地點(diǎn)；2.聚會(huì)人員介紹；3.其他注意事項(xiàng)。注意：1.詞數(shù)100左右；2.可以適當(dāng)增加細(xì)節(jié)，以使行文連貫；3.開頭和結(jié)