2021-2022年中山市英语统招专升本多轮练习题【带答案】

2021-2022年中山市英语统招专升本多轮练习题【带答案】学校:________班级:________姓名:________考号:________

一、阅读理解(30题)1.JamesBartleyprobablyneverwenttoseaagainbecause______.

A.hewanteddifferentkindsofadventures

B.offrightandshock

C.hewasdiedafterthat

D.hedoesn"thaveboat

2.Somepeoplearguethatthepressureoninternationalsportsmenandsportswomenkillstheessence(真谛)ofsport—thepursuitofpersonalexcellence.Childrenkickafootballaroundforfun.Whentheygetolderandplayforlocalschoolteams,theybecomecompetitivebuttheystillenjoyplaying.Theindividualrepresentinghiscountrycannotaffordtothinkaboutenjoyinghimself,hehastothinkonlyaboutwinning.Heisresponsibleforentirenationshopes,dreamsandreputation.AgoodexampleistheWorldCupsoccer.Footballistheworldsmostimportantsport.WinningtheWorldCupisperhapsthesummitofinternationalsportingsuccess.MentionArgentina(阿根廷)tosomeoneandthechancesarethathellthinkoffootball.Inasense,winningtheWorldCupputsArgentinaonthemap.SportsfansandsupportersgetquiteunreasonableabouttheWorldCup.PeopleinEnglandfeltthattheircountrywassomehowimportantaftertheywonin1966.LastyearthousandsofScotssoldtheircars,andeventheirhouses,andspentalltheirmoneytravelingtoArgentina,wherethefinalswereplayed.So,amIarguingthatinternationalcompetitionkillstheideaofsport?Certainlynot!DotheArgentinianreallybelievethatbecauseelevenoftheirmenprovedthemostskillfulatfootball,theirnationisineverywaybetterthanallothers?Notreally,butitsnicetoknowthatyouwonandthatinonewayatleastyourcountryisthebest.

Inthesecondparagraph,theword"summit"means"

A.highestpointB.mountaintopC.prizeD.finish

3.VisitorswillnoticeAmericans'desireforopennessintheway______.

A.theywailedtheirhouseswithglass

B.theyleavetheofficedoorsopenwhileworking

C.theyneverhavefence

D.theydependeduponeachother

4.Sometimesitisdifficult______theskillsyouhave.

A.toplayB.abilitiesC.torecognizeD.recognizes

5.Amongthetrafficlights,redlightisplaced_____.

A.atthebottom

B.inthemiddle

C.atthetop

D.belowthegreenlight

6.43.Theauthortendstothinkthatthefifthlevel______.A.wouldbelittlebetterthanthefourthlevelB.maybealotmoredesirablethanthefirstfour

C.canbethelastandmostsatisfyinglevel

D.willbecomeattainablebeforethegovernmenttakesactions

7.Energyisobtainedfromriversby______.

A.buildingbridgesacrossthem

B.drivinggeneratorsintothem

C.buildingdamsacrossthem

D.directingthemintohomesandfactories

8.WhatcanwelearnabouttheMcGaritygirl?

A.Sheisproudbuthonest.

B.Sheisselfishandcruel.

C.Sheislonelybutfriendly.

D.Shelivesinunhappylife.

9.

根据以上材料，回答44～47问题。

第44题Fromthepassagewecanknowthat“thewhite—haired”boyis________．

10.Theunderlinedword"they"inthelastparagraphrefersto______.

A.criminalsB.pigeonsC.thestolencarsD.demandsformoney

11.CharlesCrossfelt______.

A.angrywhenthegovernmentpaidlittleattentiontohisideas

B.pleasedwhenthegovernmentdidtakenoticeofhisplan

C.surprisedthattheofficialwereinterestedinhissuggestion

D.disappointedatthelackofinterestshowninhisplan

12.Whatistheauthorsattitudetowardsinternationalgames?

A.Nationsthatmeetonafootballfieldareunlikelytomeetonabattlefield.

B.Nationsthatgivemuchattentiontointernationalcompetitionsareworld-famousinmanyways.

C.Nationsthatwinininternationalgamesprovethebestonthesportsfieldatleast.

D.NationsthatwintheWorldCupSoccerareregardedasbestinallaspects.

13.Whichofthefollowingcantaketheplaceofthesentence"whenpeopleliveinplenty..."?

A.Whenpeoplehavemoremoneythanisneeded..

B.Whenpeoplehavequitealargeamountofwealth..

C.Whenpeoplenolongerworryaboutnothavingenoughfortheirdailyneedsoffoodorclothing..

D.Whenpeopleneedalargenumberofdailyneeds..

14.HolidaycelebrationsintheUnitedStatesoften______.

A.ignoretheimportanceoffamily

B.arecenteredaroundthefamily

C.arecenteredaroundwork

D.arecenteredaroundanimals

15.Accordingtotheauthor,achild'scharactercanbemostdeeplyinfluencedby______.

A.whathedoesoutofclass

B.whathelearnsinbooks

C.hisplaceinsociety

D.hislessonsatschool

16.WhichofthefollowingstatementsisNOTtrue?

A.LawntennisbecamepopularveryrapidlyintheUnitedStates.

B.ItwasMajorWalterWingfieldwhoinventedcourttennis.

C.Thesportwascalled"lawntennis"shortlyafteritwasinvented.

D.MissOuterbridgesetupalawntenniscourtwiththehelpofherbrother.

17.Thequestion"Howdoyoufeel?"seemstobecorrectandsuitablewhenaskedof______.

A.amanworkingathisdesk

B.apersonhavinglostaclosefriend

C.astrangerwholookssomewhatworried

D.afriendwhoisill

18.54.Thewriterthinksthatwecan'tjudge______.A.buildingsbytheancientstandardsB.allthebuildingsbytheancientstandardsC.allthemodernbuildingsbytheancientstandardsD.modernbuildings

19.Thebabywasfound______.

A.inthemudatthebaseofatree

B.highinthebranchesofatree

C.inthecloset

D.inabush

20.IntheFrenchstory,somepeoplewereregardedasthefirstAprilFoolsbecause______.

A.theycelebratedNewYear'sDayonJan.1stoftheoldcalendar

B.theycelebratedNewYear'sDayonApril1stoftheoldcalendar

C.theycelebratedAprilFool'sDayonJan.1stoftheoldcalendar

D.theycelebratedAprilFool'sDayonApril1stoftheoldcalendar

21.Dispensingdrugswithoutaprescriptionis______.

A.legal,andWildeswillbeprosecuted

B.illegal,andWildeswillbesenttojail

C.illegal,butWildesprobablywon'tbeprosecuted

D.somethinganyonecando

22.Allthehousewiveswhowenttothenewsupermarkethadonegreatambition:tobetheluckycustomerwhodidnothavetopayforhershopping.Forthiswaswhatthenoticejustinsidetheentrancepromised.Itsaid:"Remember,onceaweek,oneofourcustomersgetsfreegoods.ThisMayBeYourLuckyDay!"ForseveralweeksMrs.Edwardshoped,likemanyofherfriends,tobetheluckycustomer.Unlikeherfriends,shenevergaveuphoping.Thecupboardsinkitchenwerefullofthingswhichshedidnotneed.Herhusbandtriedtoadviseheragainstbuyingthingsbutfailed.Shedreamedofthedaywhenthemanagerofthesupermarketwouldapproachherandsay,"Madam,thisisYourLuckyDay.Everythinginyourbasketisfree."OneFridaymorning,aftershehadfinishedhershoppingandhadtakenittohercar,shefoundthatshehadforgottentobuyanytea.Shedashedbacktothesupermarket,gottheteaandwenttowardsthecash-desk.Asshedidso,shesawthemanagerofthesupermarketapproachher."Madam,"hesaid,holdingouthishand,"Iwanttocongratulateyou!Youareourluckycustomerandeverythingyouhaveinyourbasketisfree!"

Thehousewiveslearntabouttheofferoffreegoods______.

A.onTV

B.fromthemanager

C.atthesupermarket

D.fromthenewspaper

23.Thephenomenonthattoday'schildrenseemadult-likeisattributedbytheauthorto______.

A.thewidespreadinfluenceoftelevision

B.thepoorarrangementofteachingcontent

C.thefastpaceofhumanintellectualdevelopment

D.theconstantlyrisingstandardofliving

24.Accordingtothepassage,parentswhosechildrenshowaspecialinterestinsport______.

A.feeluncertainiftheyshouldlettheirchildrentraintobesportsmenorwomen

B.trytogetfinancialsupportfromthegovernmentfortheirchildren'straining

C.havetogetmedicaladvicefromdoctorsabouttrainingmethods

D.prefertheirchildrentobetrainedasyoungaspossible

25.Whatcouldbesaidabouttheadrenalin?

A.Itissecretedbythekidneysintothebloodstream.

B.Itishormonethatpreparesthebodyforemergencies.

C.Itistheonlyusefulhormoneproducedinthebody.

D.Itisessentialtosustainlife.

26.Woagroup?

A.Whentheyarefeedingtheyoung.

B.Whentheyseeafamiliarelephant.

C.Whentheyaregivingbirthtobabyelephants.

D.Whentheleadingelephantgivesoutawarning.

27.Duringtheteenageyears,oneshouldlearnto______.

A.differfromothersinasmanywaysaspossible

B.getintotherightseasonandbecomepopular

C.findone'srealself

D.rebelagainstparentsandthepopularitywaves

28.ItisverydifficulttogetfromoneplacetoanotherinTokyobecause______.

A.thecityissolargeandsohigh

B.thereisnotraffic

C.wedon'tknowtheroad

D.thecityissolargeandthetrafficissoheavy

29.WildcrocodilesarenotseeninEnglandnowbecause______.

A.theyhaveallbeenshot

B.theyaretoodangerous

C.theyareallhidingundertheearth

D.theycouldnotgetusedtothecoldweather

30.Accordingtothispassage,whichoneofthefollowingspellingswouldWebsterhaveapprovedinhisdictionaries?

A.Develope.B.Theatre.C.Color.D.Honour.

二、完型填空(20题)31.33.（）A.A.seeB.realizeC.dreamD.develop

32.(50)

A.oldB.olderC.oldestD.small

33.

第26题请将正确答案填在第26处。

A.creatureB.beingC.womanD.man

34.(49)

A.byB.aboveC.inD.on

35.【B5】

A.oneB.anotherC.otherD.others

36.

37.(46)

A.onB.ofC.atD.in

38.【B7】

A.governmentB.commercialC.advertisementsD.grants

39.19.（）A.A.sourceB.conventionC.originD.immigrant

40.34.A.inventedB.discoveredC.taughtD.stopped

41.Whatisintelligence(智力)anyway?WhenIwasinthearmyI【C1】______anintelligencetestthatallsoldierstook,and,against【C2】______of100,scored160.Ihadanauto-repairmanonce,who,ontheseintelligencetests,couldnot【C3】______havescoredmorethan80.【C4】______,whenanythingwentwrongwithmycarIhurriedtohim—andhealways【C5】______it.Well,then,supposemyauto-repairmandesignedquestionsforsomeintelligencetests.ByeveryoneofthemIdprovemyselfa【C6】______InaworldwhereIhavetoworkwithmyhands,Iddopoorly.Considermyauto-repairman【C7】______Hehadahabitoftellingjokes.Onetimehesaid,"Doc,adeaf-and-dumb(聋哑)man【C8】______somenails.Havingenteredastore,heputtwofingerstogetheronthecounterandmade【C9】______movementswiththeotherhand.Theclerkbroughthimahammer.He【C10】______hisheadandpointedtothetwofingershewashammering.Theclerkbroughthimsomenails.Hepickedouttherightsizeandleft.Well,Doc,the【C11】______manwhocameinwasblind.Hewantedscissors(剪刀).【C12】______doyousupposeheaskedforthem?"Iliftedmyrighthandandmadescissoringmovementswithmyfirsttwofingers.Heburstoutlaughingandsaid,"Why,youfool,heusedhisvoiceandaskedforthem.Ivebeen【C13】______thatonallmycustomerstoday,butIknew【C14】______Idcatchyou.""Whyisthat?"Iasked."Becauseyouaresogoddamnededucated,Doc.Iknewyoucouldntbevery【C15】______"AndIhaveanuneasyfeelinghehadsomethingthere.

【C1】

A.failedB.wroteC.receivedD.chose

42.(42)

A.flightB.busC.trainD.car

43.(53)

A.professionalB.amateurC.specialD.ordinary

44.GermanzoologistRandolfMenzelsaysbeesaren'tasbusyaspeoplebelievetheyare."Beesarenotparticularly【76】.Insteadtheysleepalotandarelazy.Theyspend【77】80percentofthenightsleeping.Evenduringthedaytheyoftenflytothenest【78】theyresttheirwings."saidMenzel,azoologistattheFreeUniversityinBerlin,whohasstudiedbeesforfourdecades.Butto【79】fortheirapparentlaziness,theyareactuallyveryintelligent.Theyare【80】learnersandabletorecognizevarioussmells.

Menzelsaidbees'learning,like【81】ofmanyanimals,wasbasedonarewardsystem."Ifabeeisrewardedonceforsomething,itremembersitforaweek.Butifitisrewardedthreetimes,itwillrememberitforits【82】lifetime."SaidMenzel.Helastweekwasawardeda【83】bytheGermanZoologicalSociety.

Thememorycapacityofbeesmeanstheycan【84】amongmorethan50differentsmellstofindtheonetheywant."Whatisinterestingisthatwhatsmellsgoodtoabee,isalsoa【85】smellforhumans."saidMenzel.

(76)

A.workinghardB.hardworkingC.hardworkingD.workinghardly

45.32.

A.criminal's

B.king's

C.lady's

D.tiger's

46.________查看材料

A.wentB.cameC.reachedD.got

47.(44)

A.wasB.beingC.isD.are

48.(55)

A.grainsB.chickensC.cookiesD.eggs

49.(47)

A.forceB.seeC.remindD.popeom

50.(43)

A.countryB.universeC.worldD.area

三、语音(10题)51.(3)

A.light

B.supply

C.laundry

D.satisfy

52.(4)

A.prevent

B.president

C.pregnant

D.present

53.(2)

A.shoulder

B.louder

C.pronounce

D.around

54.(1)

A.breathe

B.though

C.clothing

D.healthy

55.（）A.A.agent

B.accent

C.accelerate

D.avenue

56.1.______A.typicalB.cycleC.apply

D.imply

57.(5)

A.likeB.limitC.knifeD.inside

58.选出下列选项中划线部分读音不同的选项（）

A.dearB.heartC.earD.tear

59.

A.excellent

B.excuse

C.explain

D.express

60.3._________A.peace

B.already

C.jeans

D.reason

四、词汇与结构(20题)61.It'snoneofyour______.

A.thingB.matterC.businessD.care

62.Thereisadifferencebetweenbeinglaidoffandbeingfired______ajob.

A.atB.fromC.withD.to

63._______itistolistentomusic!

A.WhatfunB.HowafunC.WhatafunD.Howfun

64.Mary'sdresscost______Alice's.

A.twicemore

B.twotimesmoreas

C.twiceasmuchas

D.twiceasmore

65.Grandmatoldthestoryinaverysad______andwewereallmoved.

A.soundB.tuneC.musicD.tone

66.______succeedineverythingwedo.

A.Onlybyworkinghardcanwe

B.Byonlyworkinghardwecan

C.Onlywecanbyworkinghard

D.Onlybyworkinghardwecan

67.Ifonly_________theviolininthemiddleofthenight，shedbeanidealguest．A.A.didn’tplayB.wouldntpIayC.playedD.wouldplay

68.Ifhe______thejob,hewillgetmoremoneyrightaway.

A.acceptB.acceptsC.willacceptD.hasaccepted

69.Takeyourvaccinationcertificatewithyou________theyaskforitattheairport．A.A.unlessB.incaseC.whenD.becauseof

70.Willitraintomorrow?Ihope_____.

A.noB.yesC.notD.will

71.We'dliketo______atableforfivefordinnerthisevening.

A.preserveB.reserveC.retainD.sustain

72.Hewasmade______hisworkingbecauseofhispoorhealth.

A.togiveupB.givenupC.giveupD.givingup

73.Thebabywassleeping______(peace).

74.Thatjobisquitedifficult.Icanunderstandwhyyouhave______somanyproblems.

A.runforB.runoverC.runoffD.runinto

75.Somefarmers______thatfoxesareanuisaneeandthreattothefarm.

A.declareB.announceC.claimD.protest

76.Notuntilamonkeyisseveralyearsold______toexhibitsignsofindependencefromitsmother.

A.itbeginsB.doesitbeginC.andbeginD.beginning

77.18.Hesaidhehadnodifficulty______theboathimself.A.mendingB.tomendC.inmendingD.AandC

78.Thewomanwholostthekeyhopedthefinderwouldturnitoverto______.

A.officiallyanyone

B.officialanyone

C.anyoneofficial

D.anyoneofficially

79.Tomygreatsurprisethefoodwasstillonthetable，__________．

A.nottoBetouchedB.untouchedC.untouchingD.notouch

80.Itisafantasticlandscapethatwe______.

A.neversee

B.didneversee

C.hadneverseen

D.shallneversee

五、书面表达(1题)81.Ⅵ.Writing(25points)Directions:Forthispart,youaresupposedtowriteacompositionin100--120wordsbasedonthefollowingsituation.Remembertowriteitclearly.61．一组外国人原打算在我市参观期间去你校看一看，但因临时有事不能去，请对你校布局予以介绍。注意：(1)叙述要有条理，方位清楚，要用一些方位词。(2)题目：OurSchoolYard(3)在文中要提到教学楼，办公楼，试验室，电教中心，图书馆，宿舍，食堂，操场等等。

六、写作(1题)82.Forthispart,youaresupposedtowriteanarrativepassagein100-120wordsaccordingtothefollowingsituations.

路边跪着一个学生模样的年轻女子，她面前放着—张纸，上面写着因父母突然病重而退学，希望好心人相助。写一篇短文描述此情景，并说明面对此事你如何做。

参考答案

1.B最后一段讲到自从这个事件后，JamesBartley再也没有出过海，可以推断他因此受到了惊吓。B项是正确的。

2.A前句提到worldcup非常重要，所以获得世界杯冠军应是运动生涯的最高峰。

3.B解析：本题属细节题。文章第一段最后一句已明确提示。

4.C解析：见原文第一段。人们常常很难发现人的某种技术。

5.C解析：参见第二段。

6.C43．最后一段。最后的等级就是上了税等着政府做事，我们只享受就是了。选项C是正确的。Spendingmoreontaxestopayforgovernmentactionagainst...付更多的税给政府，政府再有所行动??。不赋税，政府就不行动，第五个等级的满足就不会实现。

7.B解析：本题属细节题。文章第四段第二句已明确点明。

8.B解析：参见第二段。

9.B从文中所述可以得出结论：不管是在学校、家里、还是在工作单位，“thewhite—hairedboy”即为“得宠”的人。

10.D解析：按照就近原则去找。前面提到“Demandsforpigeon-deliveredmoney”，故正确答案应为D。

11.D

12.C文章最后一段最后一句it"snicetoknow…atleastyourcountryisbest意思是在某一方面你们国家是最好的，选C。

13.C解析：本题属推理分析题。文章第一段最后两句已指出：当人们生活充实时，蔬菜和水果越来越成为更大的需求。

14.B解析：见原文第一段。在美国，在大多数的节假日中，家庭扮演着很重要的角色。

15.A解析：本题属理解判断题。根据文章第二段第二句中的“experience”便可推断出答案。

16.B根据文章内容，可知B项不正确，courttennis并不是MajorWalterWingfield发明的。

17.D

18.C54．答案为C。根据第二段第一句，Wecan'tjudgeeverymodernbuildingbythestandardsoftheancienttime，eventhoughweadmiretheancientbuildings作出该项选择。

19.A解析：见原文第五段。

20.A解析：由第二段的第二句和第三句“ThisnewsystemplacedthedaythathadformerlybeenthefirstdayofanewyearonApril1．ManypeoplewerereluctanttoadjusttothenewcalendarandcontinuedtocelebrateNewYear'sDayonwhathadbecomethefirstdayofApril.Thus，theybecamethefirstAprilFools.”可知A正确答案。

21.C解析：见原文倒数第二段。没有执照把没用的药送给别人是违法的。但LeeWildes似乎不会受到惩罚。

22.C由文章第一段可知答案选C项。

23.A解析：第6段第3行“betheychildrenoradults．”意为“不管是孩子还是成人。”点明题意。

24.A

25.B

26.D解析：由第二段“Anunfamiliarcallmaymeanthatanelephantfromoutsidethefamilygroupisnearby.Astrangercancausetrouble…”可知D为正确答案。

27.C解析：本题为推断题。作者在文中分析了十多岁的青少年们的心理特点，认为他们不应盲目跟从大众而应找到自我、发现自我。“Well，gotoit.Findyourself.Beyourself”反映了作者鼓励他们发现自我的观点。

28.D解析：文中第二行中指出原因即城市太大，交通太拥挤。

29.D第三段中写道英国现在的气候太冷不适合鳄鱼居住。

30.C解析：参见最后一句。

31.B

32.C

33.D从后面呼应的meanttheobject“man”可知此处应该填man。

34.D解析：onone'sfeet=stand“站起来”。

35.C解析：ontheotherhand属于固定搭配，意为“另一方面”。暗含和上文提到的事进行对比。

36.C孩子不是造成她suffering“痛苦”，anxiety“焦虑”的根源，因此不选A、D两项；difficulty“困难”，也不符合此处语境。从后文判断，作者向孩子发脾气，但孩子并不是导致她生气的根源，故选C。

37.D解析：在咖啡里，用in。选项D是正确的。

38.A解析：既然是公共电视台，政府肯定要出资，因为它不做广告又不收费。

39.Cnationalorigin意为“原来的国籍”。

40.A34．答案为A

根据上一句话的意思我们知道这句话的意思应该是VOA创造了一种更简单的新闻英语，“创造”为invent，故选A。

41.C从第一段第二句知“所有的士兵都参加了考试”，故可排除D项；“我得了160分而平均分才100分”，可以排除A项。而B项搭配不对。故应选C项。、

42.A解析：见上一条。

43.A解析：以前，奥运会的参赛者都不是职业运动员。所有的运动员都是业余的。直到现在，这种情况才发生了变化。

44.B解析：从此空白处可以看出，此处应该填入表语，而不能填入动词的进行时态，因为动词的现在进行时表示讲话时正在发生的动作，如果使用动词的进行时态，就说明蜜蜂正在工作，因此A和C不正确；hard可以用做形容词(坚固的，困难的)和副词(努力地，辛苦地)，hardly是副词，意思是“几乎不，简直不”。hardworking是个复合词，意思是“苦干的，不辞辛劳的”，可以作表语，故B是正确答案。

45.B

46.D词义辨析题。

【应试指导】get和reach都有“到达”的意思，但reach后不能跟t0。

47.C

48.D解析：通篇讲了鸡蛋的好处，又反驳了对鸡蛋的错误看法，这里指的肯定是鸡蛋。选项D是正确的。

49.A解析：宪法虽然并没有强迫选举人必须选举自己发誓要选的候选人，但选举人通常是按照誓言做的。

50.C解析：这之后，夏季奥运会每四年就会在世界不同城市举行。

51.C解析：画线部分读[i]，其他选项的画线部分读[ai]。

52.A解析：画线部分读[i]，其他选项的画线部分读[e]。

53.A解析：该题测试元音字母组合ou的读音。选项B、C、D中字母on发[au]音；选项A中字母ou发[eu]音。

54.D解析：选项A、B、C中th发浊音[z]；选项D中th发清音[θ]。

55.D

56.AA项的划线部分发[i]，而B、c、D三项划线部分的发音为[ai]，因此选A项。

57.B

58.B

59.AA项划线部分发[eks]，而B、C、D三项划线部分发[iks]，所以选A项。

60.B

61.C解析：noneofyourbusiness“不关你的事”是习惯用语。

62.B解析：befiredfromajob表“被从某个岗位上解雇下来”。

63.A

64.C解析：表示倍数的词用在比较句中常用的结构是：主语+谓语动词+倍数+as+much/many+(名词)+as+名词或代词。

65.Dsound声音；tune曲调；music音乐；tone语调。句意为：奶奶用悲伤的语调讲述了那个故事，所以我们都被感动了。

66.A解析：“only+状语”置于句首时，句子倒装。

67.B

68.B解析：条件状语从句中常用一般现在时态表示将来。

69.B

70.C解析：本句是省略句。

71.B解析：本题考动词的辨析。preserve意为“保存”；reserve意为“预订”；retain意为“留”；sustain意为“维持”。本句大意为：我们想订今晚五人的餐桌。

72.A解析：使役动词make用在被动句中其后的不定式不省略to。

73.peacefully

74.D

75.C解析：claim指“声称”。

76.B解析：Not开头的句子要求部分倒装。

77.D18．答案为D

参考译文：他说，他自己修理这条小船没有困难。在nodifficu