2021年遼寧省葫蘆島市公共英語五級(筆試)知識點匯總（含答案）

2021年遼寧省葫蘆島市公共英語五級(筆試)知識點匯總（含答案）學(xué)校:________班級:________姓名:________考號:________

一、1.ListeningComprehension(15題)1.ThechangesintheU.S.A.inthe1960sbeganwiththe______RightMovement.

2.PartC

Directions:Youwillhearatalk.Asyoulisten,answerthequestionsorcompletethenotesinyourtestbookletforQuestions21-30bywritingNOTMORETHANTHREEwordsinthespaceprovidedontheright.YouwillhearthetalkTWICE.

Younowhave1minutetoreadQuestions21-30.

聽力原文：ForthoseofyouwhoareeitheralreadystudyingintheUnitedStatesorplanningtooneday,itmightbeinterestingtoknowsomethingabouttheforeignstudentpopulationintheUnitedStates.Fortheacademicyear1995/96therewasasumofapproximately344,000foreignstudentsstudyingintheUnitedStates.Thisfigureof344000mayseemlikeaverylargenumberuntilyoucompareitwiththetotalpopulationof241,000,000.Theforeignstudentpopulationhasbeengrowingforanumberofyearsandisstillgrowing,buttherateofincreasehasdroppedsharplyduringthe1990s.Duringthe1980s,thepopulationgrewquiterapidly.Forexample,between1985and1990.theaverageyearlyincreasewas12.5%.However,thepictureinthe1990sisquitedifferent.Therateofincreasehasdeclinedquitenoticeably.Infact,therateofincreasebetween1994/95and1995/96wasonly0.5%,orone-halfofonepercent.Althoughtheoverallrateofincreasehasdroppedtoonly0.5%.thenumberofstudentsfromsomepartsoftheworldisincreasingwhilethenumberofstudentsfromotherareasisdecreasing.Forexample,duringthissameperiod,thatisbetweentheacademicyears1994/95and1995/96,therewasadecreaseinthenumberofstudentsfromtheMiddleEast,whilethenumberofstudentsfromSouthandEastAsiaincreased.Thesechangesinthenumberofstudentscomingfromdifferentpartsoftheworldnodoubtreflectedchangingeconomicandpoliticalsituations.I'msureyouareawareofmanyofthesechanges,andperhapswecandiscussthematournextmeeting.Fortodaylet'sconfineourtalktofirst,adiscussionoftheoriginofthesestudents,or,inotherwords,wheretheycamefrom;second,thekindsofstudiestheypursue;and,finally,theacademiclevelstheyarefoundin.Ifwehavealittletimeleft,wemightquicklytalkaboutinwhichgeographicareasmostofthemgotoschool.

Let'sdiscusstheoriginsoftheforeignstudentpopulationintheUnitedStatesfortheacademicyear1995/96.Let'sdiscussitinorderfromthoseareassendingthemoststudentstothoseareassendingthefeweststudents.IfwelookatthefiguresprovidedbytheannualcensusofforeignstudentsintheUnitedStatesfortheyear1995/96,weseethatmostoftheforeignstudentsstudyingintheUnitedStatesduringthisyearwerefromSouthandEastAsia.ThisisaratherlargegeographicalareawhichincludessuchconutriesasChina,Korea,Pakistan,India,Malaysia,andIndonesia.Thetotalnumberofstudentsfromthisarea,SouthandEastAsiawas156,830.Inotherwords,roughly2outofevery5foreignstudentscomefromSouthandEastAsia.Almost24000ofthistotalwerefromChina.Malaysiawasclosebehindwithjustalittleover23000students.ThenextlargestnumberofstudentscamefromtheMiddleEast.ThenumberofstudentsfromtheMiddleEastcametoaboutone-thirdthenumberfromSouthandEastAsia.ThefourthlargestnumbercamefromSouthAmerica.NextcanleEurope,Africa,NorthAmerica,andOceania.Let'srecapitulatewhatwe'vesaid.ThelargestnumberofstudentsstudyingintheUnitedStatesduringtheacademicyear1995/96werefromSouthandEastAsia,followedbytheMiddleEast,SouthAmerica,Europe,Africa,NorthAmerica,andOceania.

Whatfieldsaretheselargenumbersofforeignstudentsstudyingin?Itprobablywon'tsurpriseyouthatthelargestnumberareinthefieldofengineering.Infact,21.7%ofthetotalnumberarestudyingengineering.Businessandmanagementisclosebehind,however,withatotalof18.9%.Thethirdmostpopularfieldwasmathematicsand

3.聽力原文：Farmersusuallyuseplowstopreparetheirfieldsforplantingcrops．Plowscutintotheground，andliftupweeds，andotherunwantedplants．However，plowingisblamedforcausingseveredamagetotopsoilbyremovingtheplantsthatprotectsoilfrombeingblownorwashedaway．ManyfarmersinSouthAsiaarenowtryingaprocesscalledLowTillFarming．LowTillFarminglimitstheuseofplows．Inthismethodoffarming，seedsandfertilizerareputintothesoilthroughsmallcutsmadeinthesurfaceoftheground．LowTillAgricultureleavesmuchorallthesoilandremainsofplantsontheground．Theyserveasanaturalfertilizerandhelpsupporttherootsoffuturecrops．Theytakeinrainandallowittoflowintothesoilinsteadofrunningoff．IthasbeenprovedthatLowTillFarmingincreasesharvestsandreduceswateruse，andthismethodreducestheneedforchemicalproductsbecausetherearefewerunwantedplants．ScientistssayLowTillFanningisbecomingpopularinSouthAsia，whichisfacingaseverewatershortage．TheysaytheareawillbecomedependentonimportedfoodunlesswaterissavedthroughmethodslikeLowTillFarming．Currently，morethan150millionpeopleinSouthAsiadependonlocalriceandwheatcrops．Farmersgrowriceduringwetweather．Duringthedryseasontheygrowwheatinthesamefields．FarmersareusingtheLowTillFarmingmethodtoplantwheatafterharvestingrice．ScientistssayLowTillAgricultureisoneofthebestexamplesintheworldoftechnologiesworkingforbothpeoplearidtheenvironment．

Whatisthemainproblemcausedbytheusualwayofplowing?

A.Thecrop'sbloomingperiodisdelayed.

B.Therootsofcropsarecutoff.

C.Thetopsoilisseriouslydamaged.

D.Thegrowthofweedsisaccelerated.

4.What'stheCivilRightsMovementfor?

5.PartC

Directions:Youwillhearatalk.Asyoulisten,answerthequestionsorcompletethenotesinyourtestbookletforQuestions21-30bywritingNOTMORETHANTHREEwordsinthespaceprovidedontheright.YouwillhearthetalkTWICE.

Younowhave1minutetoreadQuestions21-30.

聽力原文：Todaywetakeitforgrantedthatthemailwillbedelivereddailyatourdoor．Butmanyyearsagoitmighthavebeenplacedinatreetrunkorunderneatharock．Intheearlydaysofthemailnoonecouldbesureaboutwhereorwhenitwouldarrive．

AtthesoutherntipofAfricatherewasonceapostofficeunderarock．IntheolddaystheroutefromEnglandtoIndiawasaroundtheCapeofGoodHope．Thejourneywasstormyanddangerous．Ittooksixlongmonths．Sailorsoftenwishedtosendmailhome．buttheyseldommetshipsboundbacktoEngland．Soatthecapethesailorswouldgoashore．Theyheadedforacertainlargestone．Onthestonewerescratchedthewords“Lookhereunderforletters．”Theywouldleavetheirlettersthere．knowingthatthenexthomeward-boundshipwouldstopandpickthemup．

TherewasanotherpostofficelikethisatthesoutherntipofSouthAmerica．Duringthegoldrushdays，boatssailedaroundCapeHorntoCalifornia．AtCapeHornwasakegnailedtoapost．Boatscomingfromtheeastcoastwouldsendasmallboatashoretothispostoffice．Theypickedupanylettersinthekeg．Atthesametimetheymailedlettershomethatboatssailingeastcouldpickup．

InthestateofWashingtonstandsthestumpofahugecedar．It，too，wasonceapostoffice．Settlersneededaplaceforthemailcarrierstoleavetheirletters．Theirhousesweresowidelyscatteredthatthemailcarriercouldnotreachallofthem．a(chǎn)ndthepostofficewasfarawayoverroughroads．Sothesettlersfoundatreethatstoodwhereseveraltrailscrossed．Theycutthetreedowntenfeetfromtheground．holloweditout．a(chǎn)ndcovereditwitharoof．Inside,theynailedarowofwoodenboxes．Eachboxwasmarkedwithafamily'sname．Themailcarriercouldleavelettersthereforeveryoneformilesaround．

ForthefirstfewyearsaftertheEnglishcolonistscarnetoAmerica，therewasnoregularpostalservice．Peoplegavetheirletterstoanytravelerwhohappenedtobegoingintherightdirection．Oftentheygavethemtoapeddleroratravelingshoemaker．Whenthetravelerreachedthetownwheretheletterwasgoing，hemightstopataninn．Hewouldleavethelettersthere．Buttheretheystayeduntilthepersontheywereaddressedtohappenedtocomebyandstoppedattheinn．

WhataboutplaceslikeVirginiawheretherewereveryfewinns?Peoplewhowishedtosendletterswouldleavethematoneofthelargeplantations．Theownersoftheplantationwouldthensendthelettersontoaneighbor．Theneighborwoulddothesame．Itwasaslowmailsystem．

Aftermanyyears，regularmailcarriersonhorsebackwerehired．Theywentfromonebigtowntoanother．BetweenNewYorkandBoston，forexample．therewasone“postrider”amonth．Hetraveledonlybydayandtooktwoweeksforthetrip．Oftenthepostriderleftallthemailforawholetownatacrossroadsstore．ItstilltookmanyweeksforalettertoreachthepersonItwasaddressedto．

Finally，abouttwohundredyearsago，BenjaminFranklinwasmadepostmasterforallthecolonies．Hisfirstactwastomakealongjourneytofindoutthebestroutesforcarryingthemail．Thenhesetupalineofpoststationbetweenthenorthernandsoutherncolonies．Heorderedhispostriderstotravelbynightaswellasbyday．

Franklin'spostriderscouldcarrymorelettersinashortertimefromonecolonytoanother．TheletterservicehelpedtheyoungAmericancolonieslearnmoreabouteachother．Theylearnedthattheywereallinterestedinthesamethings．Thisgavethemthefeelingofunitythatlaterhelpedthemwintheirindependence．

6.Whatdoesthetalkmainlyconcern?

7.Womenhavemorefatcellssowomenhavelesswater.

A.TrueB.Fasle

8.Accordingtothetalk,onlyrealcharactersportrayedinbooksmaybecomeourfriends.

A.TrueB.Fasle

9.Waterisasimportantasvitamins,mineralsandproteinsforlife.

A.TrueB.Fasle

10.The"feltimage"ismuchmoreimportantbecauseithelpsyoutobemoreconfident.

A.RightB.Wrong

11.WhichofthefollowingstatementsisNOTTRUE?

A.Gettingofftoworkwithaminimumefforthelpssaveone'senergy.

B.Dr.Kleimanexplainswhypeoplereachtheirpeaksatdifferenthoursofaday.

C.Habithelpsapersonadapttohisownenergycycle.

D.Childrenhaveenergycycles,too.

12.Whatservicemustbepaidfor?

A.Computerclasses.

B.Trainingsessions.

C.Laserprinting.

D.Packageborrowing.

13.Howlongdidittakeforchilipeppertobecomepopulararoundtheworld?

14.聽力原文：TheUniedStatesofAmericaisafoundingmemberoftheIntemationalFootballAssociation.In1913theAmericanFootballAssociationwasfoundedwithover7,000registeredclubsand1.4millionplayers.

InhistorytheU.S.teamenteredthefinalsoftheWorldCupfourtimesandgainedthethirdplaceinthefirstWorldCup.Butsincethe4thWorldCupUSAhaspaidmoreattentiontotheOlympicGamesandAmericanfootball.

TheheadcoachoftheU.S.teamnowisfromYugoslavia,the57-year-oldcoachmovedtoMexicotwenty-oneyearsagoandlaterhebecametheheadcoachofMexico'sNationalTeam．Afterthatheleftforanevensmallercountry.CostaRica.Beforelong,hebecamewell-knownallovertheworld.

OnMarch7th,1991,hefacedthebiggestchallengeinallhislifetoleadtheU.S.team.TheAmericanFootballAssociationspentayearbuildingafootballfieldinCaliforniaforhim.Andintwoyears'timehisteamdefeatedtheteamsofIreland．EnglandandPortugal.

ThustheU.S.teamenteredwitheaseintothefinalsoftheWorldCup.Andasthehost,itenteredautomaticallyintothefirstcirclein1994.

WhenwastheAmericanFootballAssociationfounded?

A.In1913.B.In1930.C.In1914.D.In1917.

15.Inwhichrespectdoesthestudents'organizationsseemtobeeffective?

A.Dealingwithacademicaffairsoftheuniversity.

B.Ensuringthatthestudentsobserveuniversityregulations.

C.Evaluatingstudents'performanceintheirstudy.

D.Keepingupthestudents'enthusiasmforsocialactivities.

二、2.UseofEnglish(10題)16.(34)

17.

【C6】

18.

【C20】

19.(41)

20.(32)

21.(36)

22.

【C4】

23.(43)

24.

【C18】

25.(39)

三、3.ReadingComprehension(15題)26.PartC

Directions:Answerquestions71-80byreferringtothefollowinggames.

Note:AnswereachquestionbychoosingA,BorCandmarkitonANSWERSHEET1.Somechoicesmayberequiredmorethanonce.

A=BOOK1B=BOOK2C=BOOK3D=BOOK4

Whichbook(s)say(s)that...

theclimateaffectsthefuturesustainableagriculturaldevelopment?71.______

environmentalcontrolisrelatedwiththenationalrevenues?72.______

theenvironmentalproblemsarenotcausedovernight?73.______

avarietyofspeciesareonthedecrease?74.______

agricultureisalsoafactorforfiledegradationofenvironment?75.______

pollutioncanbecontrolledbyincreasingtheproductioncostofpollutinggoods?76.______

pollutioncontrolneedsthesupportoftechnologyandtechniques?77.______

provideslessonsforagriculture,trade,landuseandtaxpolicyfromaneconomicperspective?

78.______

thedegradationofenvironmentcausesthechangeofclimate?79.______

theapproachestoresearchshouldbeadjustedtothechangingsituation?80.______

A

BOOK1

Thebookoffersacomprehensiveperspectiveontheconsequencesandpossiblepolicysolutionsforclimaticchangeaswemoveintothetwenty-firstcentury.Itassessestheimpactofpotentialfeatureglobalclimatechangeonagricultureandtheneedtosustainagriculturalgrowthfortheeconomicdevelopment.

Thebookbeginsbyexaminingtheroleofinternationalresearchinstitutionsinovercomingenvironmentalconstraintsonsustainableagriculturalgrowthandeconomicdevelopment.Theauthorsthendiscusshowagriculturalresearchsystemsmayberestructuredtorespondtoglobalenvironmentalproblemssuchasclimatechangeandlossofgeneticdiversity.Thediscussionthenextendstoconsiderenvironmentalaccountingandindexing,toillustratehowenvironmentalqualityc;inbeincludedformallyinmeasuresofnationalincome,socialwelfareandsustainability.Thethirdpartofthebookfocusesontheeffectsofandpolicyresponsestoclimatechange.Chaptersinthispartexaminetheeffectofclimatechangeonproduction,trade,landusepatternsandlivelihoods.Theyconsiderimpactsonthedistributionofincomebetweendevelopedanddevelopingcountriesremainamajoreconomicactivity.Authorstakeonaneconomy-wideperspectivetodrawlessonsforagriculture,trade,landuseandtaxpolicy.

B

BOOK2

Theozonelayeristhreatenedbychemicalemissions;theclimateisendangeredfromfossilanddeforestation,andglobalbiodiversityisbeinglostbyreasonofthousandsofyearsofhabitatconversions.Globalenvironmentalproblemsariseoutoftheaccumulatedimpactsfrommanyyears'andmanycountries'economicdevelopment.Inordertoaddresstheseproblemsthestatesoftheworldmustcooperatetomanagetheirdevelopmentprocessestogether—thisiswhataninternationalenvironmentalagreementmustdo.Butcantheworld'scountriescooperatesuccessfullytomanageglobaldevelopment?Howshouldtheymanageit?Whoshouldpayfortheprocess,aswellasfortheunderlyingproblems?

Thisbookpresentsanexaminationofboththeproblemandtheprocessunderlyinginternationalenvironmentallawmaking:therecognitionofinternationalinterdependence,thenegotiationofinternationalagreementsandtheevolutionofinternationalresourcemanagement.Itexaminesthegeneralproblemofglobalresourcemanagementbymeansofgeneralprinciplesandcasestudiesandbylookingathowandwhyspecificnegotiationsandagreementshavefailedtoachievetheirtargets.

Thebookisdesigned

27.

Whatcanweinferfromthesecondparagraph?

A.Somefamiliesaretoopoortopaythefullamountofthetuition.

B.Theparentsdonotfavortheform.ofloans.

C.Payingthetuitionmakestheparentsfeelhumble.

D.Thosewhoareingreatneedmaynotgetwhattheyneed.

28.(77)

29.

______isagoodmethodofsupplyingenergytoremoteareas?

30.PartC

Directions:Answerquestions71-80byreferringtothefollowinggames.

Note:AnswereachquestionbychoosingA,BorCandmarkitonANSWERSHEET1.Somechoicesmayberequiredmorethanonce.

Note：AnswereachquestionbychoosingA，B，CorDandmarkitonANSWERSHEET1．Somechoicesmayberequiredmorethanonce．

A=WashingtonD.C.B=NewYorkCityC=ChicagoD=LosAngeles

Whichcity…

istheheadquarteroftheSupremeCourt?71．______

wasdiscoveredasearlyas1524?72．______

hasservedasthecapitalofthecountry?73．______

isnowthelargestindustrialcityinthecountry?74．______

leadsthecountryinthemanufactureofaircraftandspareparts?75．______

isthelargestcity?76．______

isthesecondlargestcityinpopulationinU.S.A.?77．______

hasbecomeoneoftheworld'sbusiestports?78．______

coversanareaofover69squaremiles?79．______

isnowconsideredthecenterofindustry，transportation，commerceandfinanceinthemid-westarea?

80．______

AWashingtonD.C.

Washington，thecapitaloftheUnitedStates，isinWashingtonD.C.andissituatedonthePotomacRiverbetweenthetwostatesofMarylandandVirginia．Thepopulationofthecityisabout800,000anditcoversanareaofover69squaremiles(including8squaremilesofwatersurface)．ThesectionwasnamedtheDistrictofColumbiaafterChristopherColumbus，whodiscoveredthecontinent．ThecityitselfwasnamedWashingtonafterGeorgeWashington，thefirstpresidentofU.S.A.

Thebuildingofthecitywasaccomplishedin1800andsincethatyear，ithasservedasthecapitalofthecountry．ThomasJeffersonwasthefirstpresidentinauguratedthere．IntheWarof1812，theBritainarmyseizedthecity．burningtheWhiteHouseandmanyotherbuildings．

WashingtonistheheadquartersofallthebranchesoftheAmericanfederalsystem：Congress，theSupremeCourtandthePresidency．

Apartfromthegovernmentbuildings，therearealsosomeotherplacesofinterestsuchastheWashingtonMonument，theLincolnMemorial，theJeffersonMemorial，theLiteraryoftheCongressandMt．Vernon，homeofGeorgeWashington．

BNewYorkCity

NewYorkCity．locatedinNewYorkState,isthelargestcityandthechiefportoftheUnitedStates．ThecityofNewYorkhasapopulationofover7million(1970)andMetropolitan，12million．

Thecitywithitsgoodharborwasdiscoveredasearlyas1524，anditwasestablishedbyDutchwhonamedthecityNewAmsterdam．In1664，thecitywastakenbytheEnglishanditgotthenameNewYorkasitbearsnow．DuringtheAmericanRevolutionin1776，GeorgeWashingtonhadhishead-quartersforatimeinNewYorkCity．TheDeclarationofIndependencewasfirstreadthereinJuly4th，1776．Thecityre

31.(69)

32.

______mayaffectthedownstreamwaterqualityandhaveanimpactonplantlife?

33.(76)

34.

Accordingtothepassage,theteensinVillageGreencanbecalled______.

A.depressedgeneration

B.coolgeneration

C.attractivegeneration

D.prosperousgeneration

35.(72)

36.

Whydoestheauthormentiongeneticengineeringandcomputerscience?

A.Tocomparethemwiththenewmaterials.

B.Toshowthesignificanceofthenewmaterialsonthefutureworld.

C.Tocomparethenewmaterialswiththem.

D.Toexplainhispoint.

37.

Fromthelastparagraphwecaninferthat______.

A.thegovernmenthopestosolvetheproblembywayofvolunteerrestrictions

B.morethan47millionAmericanswhoarequalifiedtogetfluvaccineshotscannotgetthemthisyear

C.Americahastodealwithalimitedsupplyoffluvaccinesthisyear

D.normallyonlyasmallpercentageofAmericanpopulationgetsfluvaccineshotseachyear

38.

Whatdoestheunderlinedword"they"inParagraph2referto?

A.Creativeandcompetitiveinsuranceproducts.

B.Insurancecompanies.

C.Otheralternatives.

D.Investments.

39.

Fromthelastparagraphwecaninferthat______.

A.thegovernmenthopestosolvetheproblembywayofvolunteerrestrictions

B.morethan47millionAmericanswhoarequalifiedtogetfluvaccineshotscannotgetthemthisyear

C.Americahastodealwithalimitedsupplyoffluvaccinesthisyear

D.normallyonlyasmallpercentageofAmericanpopulationgetsfluvaccineshotseachyear

40.(79)

四、閱讀理解(5題)41.

根據(jù)下列選項回答26～30題：

第

26

題

1._________

42.

第

45

題

5.__________

43.

第

25

題

WhatadvicemightMaquetgivetothosewhohaveacrucialtestthenextday?

44.

第

37

題

haswonthenationalaward?__________

45.

第

42

題

2.__________

參考答案

1.Civil

2.5%．

3.C

4.Racialequality．

5.Intreetrunk/Underneatharock．

6.Behavioralmanagement．

7.A

8.B

9.B

10.B

11.B

12.C

13.100years

14.A

15.B

16.threatenthreaten解析：由33題解析可以知道此空一定為“威脅”之意。

17.surveysurvey解析：根據(jù)后面的數(shù)據(jù)，空缺處指的是1993年的一項調(diào)查問卷，所以此處應(yīng)填“survey”。

18.farfar解析：可用于修飾“toolittle”的只能是far，意為“太少，特別少”。

19.toto解析：“incontrastto”為固定搭配，意為“與…相對比”。所以此處應(yīng)填“to”。

20.atat解析：此題考固定搭配，atone’sdisposal，意為“任某人自由支配、使喚”。所以此處應(yīng)填介詞“at”。

21.surveysurvey解析：根據(jù)后面的數(shù)據(jù)，空缺處指的是1993年的一項調(diào)查問卷，所以此處應(yīng)填“survey”。

22.importantimportant解析：從本句后面的一句話可以看出，Adown-to-earthperson就算是重要的人物，他們也不會把這種顯赫寫在臉上。所以前面應(yīng)填important。故答案為important。

23.poorpoor解析：此句意為“但是很容易通過給…表現(xiàn)報酬或創(chuàng)造對報酬太…的期望而扼殺創(chuàng)造性?！憋@然，此空處應(yīng)填“劣拙的，不好的”。

24.AsAs解析：此句意為“…后一種觀點的例子，…”顯然，空處應(yīng)填“作為”。

25.againstagainst解析：guardagainst意為“防止，防范，警惕”，為固定短語，against也可以省略。

26.A解析：由A中的第一段最后一句話“Itassessestheimpactofpotentialfeatureglobalclimatechangeonagricultureandtheneedtosustainagriculturalgrowth．．．”可知。

27.D解析：原文對應(yīng)信息是：“Eagertoboosttheirmagazinerankings，whicharebasedinpartonthetestscoresofenteringfreshmen．they’rethrowingmoreaidatsmarterkids——whethertheyneeditornot．”該句話說明“學(xué)校為了提高其雜志排名，就給那些比較聰明的孩子經(jīng)濟上給予較大的幫助，不管他們需不需要幫助”。由此可以看出，急需幫助的學(xué)生并不一定就能獲得幫助。所以A、B、C均不符合題意。所以本題應(yīng)選D。

28.B解析：由B中的第二段最后幾句話“Millerisorderedtotakehissquadbehindenemylinesonadangerousmissiontofindandretrieveoneman：PrivateJamesRyan．”可知。

29.D解析：由D中的advantage內(nèi)容最后一條“Agoodmethodofsupplyingenergytoremoteareas.”可知答案為D。

30.A解析：由A中的第三段“Washingtonistheheadquartersofallth