2021年安徽省黃山市公共英語五級(筆試)知識點匯總（含答案）

2021年安徽省黃山市公共英語五級(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.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,andthepostofficewasfarawayoverroughroads.Sothesettlersfoundatreethatstoodwhereseveraltrailscrossed.Theycutthetreedowntenfeetfromtheground,holloweditout,andcovereditwitharoof.Inside,theynailedarowofwoodenboxes.Eachboxwasmarkedwithafamily'sname.Themailcarriercouldleavelettersthereforeveryoneformilesaround.

ForthefirstfewyearsaftertheEnglishcolonistscametoAmerica,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.Theylearnedthattheywereallinterestedin

2.PartA

Directions:Youwillhearatalk.Asyoulisten,answerQuestions1-10bycirclingTRUEorFALSE.YouwillhearthetalkONLYONCE.Younowhave1minutetoreadQuestions1-10.

聽力原文：DoItYourselfMagazineorganizesacompetitioneverysummertoelectthe"Handymanoftheyear".ThewinnerofthisyearisMr.RoyMiller,aSheffieldpostman.Ajournalistandaphotographerhavecometohishouse.ThejournalistisinterviewingMr.Millerforanarticleinthemagazine.

W:Well,I'mveryimpressedbyalltheworkyou'vedoneonyourhouse,Mr.Miller.Howlonghaveyoubeenworkingonit?

M:IfirstbecameinterestedinDo-it-Yourselfseveralyearsago.Yousee,mysonPaulisdisabled.He'sinawheel-chairandIjusthadtomakealterationstothehouse.Icouldn'taffordtopayworkmentodoit.Ihadtolearntodoitmyself.

W:Hadyouhadanyexperienceinthiskindofwork?Didyouhaveanypracticalskills?

M:No.Igotafewbooksfromthelibrarybuttheydidn'thelpverymuch.SoIdecidedtogotoeveningclassessothatIcouldlearnbasiccarpentryandelectricalwiring.

W:Whatsortofchangesdidyoumaketothehouse?

M:Firstofall,practicalthingstohelpPaul.Youneverreallyrealizetheproblemshandicappedpeoplehaveuntilitattacksyourownfamily.Mostgovernmentbuildings,forexample,havestepsuptothedoor.Theydon'tplanbuildingssothatdisabledpeoplecangetinandout.Weusedtoliveinaflat,andofcourse,itwastotallyunsuitable.Justimaginetheproblemsadisabledpersonwouldhaveinyourhouse.WeneededalargernoisewithwidecorridorssothatPaulcouldgetfromoneroomtoanother.Wedidn'thavemuchmoneyandwehadtobuythisone.It'soverninetyyearsoldanditwasinaverybadstateofrepair.

W:Wheredidyoubegin?

M:Theelectrical.IcompletelyrewiredthehousesothatPaulcouldreachalltheswitches.Ihadtolowerthelightswitchesandraisethepower-points.IwentontodothewholehousesothatPaulcouldreachthingsandgowhereheneeded.

W:Whatelsedidyoudo?

M:BythetimeI'dalteredeverythingforPaul,do-it-yourselfhadbecomeahobby.Ireallyenjoyeddoingthingswithmyhands.Look,Ieveninstalledsmoke-alarms.

W:Whatwasthepurposeofthat?

M:Iwasveryworriedaboutfire.Yousee,Paulcan'tmoveveryfast.Ifittedthemsothatwewouldhaveplentyofwarningiftherewereafire.Iputinacompleteburglar-alarmsystem.Ittookweeks.Thefrontdooropensautomatically,andI'mgoingtoputadeviceonPaul'swheelchairsothathe'llbeabletoopenandcloseitwhenhewants.

W:Whatareyouworkingonnow?

M:I'vejustfinishedthekitchen.I'vedesigneditsothathecanreacheverything.NowI'mbuildinganextensionsothatPaulwillhavealargeroomonthegroundfloorwherehecanwork.

W:There'sa$10,000prize.Howareyougoingtospendit?

M:IamgoingtostartmyownbusinesssothatIcanconvertordinaryhousesfordisabledpeople.IthinkI'vebecomeanexpertondiesubject.

ThoughPaulisdisabled,hemanagedtomovearoundinthehouse.

A.TrueB.Fasle

3.Howmanyreactionscouldyouhavetowardstheteacher'sreport?

4.聽力原文：M：Cigarette?

W：No，thankyou．I'vegivenup，youknow．

M：Oh．

W：It'stendaysago．Haven'thadone．

M：Well．youdon'tmindifIhadone．

W：Well，allright，then…Ohmygoodness!That'saterriblecough．

M：No，no,it'snot．It'sonly…Ionlygetitfirstthinginthemorning．

W：That'sgoingtomakeyouveryunfit，youknow．

M：No，it'sallright．Itgoesinaminute．

W：Whydon'tyoutryandgiveup?

M：Oh，no．Ioughtto，butIcan't．Itrelaxesme，smoking．

W：Really?

M：Itdoes．

W：Well，haveyoueverthoughtofjustcuttingdown?

M：Oh，no，that'sallveywellbut…Iwouldn'tenjoyit．Idependabitonmysmoking．Imustsay．

W：Youshoulddoitgradually．Imean…well，ifyoutried…h(huán)aveyouthoughtofjustgivinguponeday?

M：Yes，ohwell，yes，thatisquiteagoodidea．

W：Itis．

M：ButIthinkI'dlosecountorsomething．

W：Ohdear!Well，itmightbeallideaifyoustartedeatingsweets．

M：Ohno．Icouldn'tdothat．Icouldn'tpossibly…

W：Why?

M：Well．itmakesyoufat．

W：Well．doyouthinkthatmatters?Don'tyouthinkitisbettertobefatthantobeunhealthy?

M：No，Idon't．I'dratherbefat…Well，I'dratherbethinthanfat，certainly．

W：Ohdear．Well．Hey!I'vegotagoodidea!

M：What'sthat?

W：Whydon'tyougotoahypnotist?Mysisterdid!

M：Oh，look，youdon'tseemtorealizethatIlikesmoking．IfIgaveitup，ifIdidn'tsmokeatall，I'dprobablyendupattackingpeople!

W：Oh,don'tbesosilly!Ofcourseyouwouldn't!

Whendidthewomangiveupsmoking?

A.Tendaysago.

B.Justthismorning.

C.Aweekago.

D.Justyesterday.

5.聽力原文：Todayit'smyturntogivetheweeklyoralpresentation,andthetopicthatProfessorMayhadassignedtomeis“thelifeofthepoet,EmilyDickinson”.ComparedwithWaltWhitmanwhomwediscussedlastweek.IfoundEmilyDickinsonstrikinglydifferent.SheseemedinfacttobethecompleteoppositeofWhitmaninherlifeandinherwork.Iwouldliketosharebrieflywiththeclasssomeoftheessentialfactsofherbiography.EmilyDickinsonwasbornin1830inAmherst,Mass,barelyadecadeafterWhitman.Inherearly20'sforreasonswhichstillremainamysteryshebegantowithdrawfromherordinarycontactwiththeworld.Fortheremaining30yearsofherlifeshewasseldomseenoutsideherhome.InthisrespectshewasquiteunlikeWhitmanwholovedthegreatoutdoors.EmilyDickinsonspenthersolitarydayscorrespondingwithherfriendsandwritinghundredsofremarkablepoems,notably“Iheardaflybuzz”andthepoemwehavereadfortoday“I'mnobody”.Althoughsheshowednoneofherpoemstoherfamilyandsentsomeofherletterstofriends.onlyfourwerepublishedinherlifetime.Mostofthem,almost1,200poemswerediscoveredinherroomaftershediedin1886attheageof56.Thesepoemshaveestablishedherasamajorpoet,andseveralmoderncriticsconsiderherthegreateStwomanpoetintheEnglishlanguage.Eh,that'saboutallIhave.Isthereanyquestion?Ifnot,weshouldprobablybegintalkingaboutDickinson's“I'mnobody”,thepoemProfessorMayassignedforthisweek'sclassdiscussion.

Whoisthespeaker?

A.Apoet.B.Ateacher.C.Astudent.D.Anartist.

6.Whatdoeshelikeabouthisjob?

A.Money.

B.Freedom.

C.Knowingdifferentpeople.

D.Travelingalot.

7.WhatistheeffectoftheWomen'sMovement?

8.Whatcanthelistenersrelyonwhentheyarelistening?

9.Calories,naturalfood,mountainsandthedistancefrommoderncitiesaretheonlycommonthingsinthethreeregions.

A.TrueB.Fasle

10.MDrefersto“adoctorofmedicine”．

A.RightB.Wrong

11.Whyshouldamanagerstudybehavioralmanagement?

12.Whatsuggestiondoesthemanthinkitisgood?

A.Trytogiveupsmoking.

B.Eatsweetseverydayinsteadofsmoking.

C.Trytogiveuponecigaretteeveryday.

D.Gotoahypnotist.

13.Mr.Millerwillbuyanewhousewiththemoneyhehaswon.

A.TrueB.Fasle

14.Do-it-YourselfhasbecomeoneofMr.Miller'shobbies.

A.TrueB.Fasle

15.Thepossibilitiesofourliteraryexperiencesarealmostunlimited.

A.TrueB.Fasle

二、2.UseofEnglish(10題)16.(43)

17.(34)

18.

【C7】

19.

【C5】

20.(49)

21.

【C9】

22.

【C3】

23.

【C20】

24.

【C18】

25.(35)

三、3.ReadingComprehension(15題)26.

Thephrase"vocal...exponent"(Line2,Para.5)mostprobablyrefersto______.

A.eloquentdoctor

B.articulateopponent

C.loudspeaker

D.strongadvocate

27.

FromDr.Dustan'sstudywecaninferthat_____.

A.alow-saltdietmaybeprescribedforsomepeople

B.theamountofsaltintakehasnothingtodowithone'sbloodpressure

C.thereductionofsaltintakecancureahypertensivepatient

D.anextremelylow-saltdietmakesnodifferencetoanyone

28.

Thefederalgovernmentgetsmostoftheirincomefrom______．

A.propertytaxB.incometaxC.salestaxD.estatetax

29.

Whatisthemainmessageofthistext?

A.Thatthesaltscareisnotjustified.

B.Thattheorginofhypertensionisnowfound.

C.Thatthemoderateuseofsaltisrecommended.

D.Thatsaltconsumptionistobepromoted.

30.

Whatcanweinferfromthesecondparagraph?

A.Somefamiliesaretoopoortopaythefullamountofthetuition.

B.Theparentsdonotfavortheform.ofloans.

C.Payingthetuitionmakestheparentsfeelhumble.

D.Thosewhoareingreatneedmaynotgetwhattheyneed.

31.

WhatisNOTtrueabouttheeightgirls?

A.Theyareallbetween12and17.

B.Theyhavetriedavarietyofmeasures.

C.Theyattendasuicidesquad.

D.Alltheirattemptstocommitsuicidearevital.

32.(73)

33.

Fromthelastparagraphwecaninferthat______.

A.thegovernmenthopestosolvetheproblembywayofvolunteerrestrictions

B.morethan47millionAmericanswhoarequalifiedtogetfluvaccineshotscannotgetthemthisyear

C.Americahastodealwithalimitedsupplyoffluvaccinesthisyear

D.normallyonlyasmallpercentageofAmericanpopulationgetsfluvaccineshotseachyear

34.(80)

35.PartC

Directions:Answerquestions71-80byreferringtothefollowinggames.

Note:AnswereachquestionbychoosingA,BorCandmarkitonANSWERSHEET1.Somechoicesmayberequiredmorethanonce.

A=TheImperialPalaceB=TheTempleofHeavenC=PotalaPalaceD=JokhangTempleWhichpalaceortemple...

isthespiritualcenterofTibet?71.______

iscircularinthenorthernpartwhilesquareinthesouthernpart?72.______

presentsthelargestandmostcompleteensembleoftraditionalarchitecture?73.______

coversabuildingspaceof90thousandsquaremeters?74.______

istheoldestoneamongthefourinthetext?75.______

canpresentthevisitorthesignificanceofHeavenKitchen?76.______

isacombinationofarchitecturalstylesfromHan,TibetanandNepalese?77.______

wasthereligiousandpoliticalcenterofoldTibet?78.______

isalongwithmanycomparativelysmallbuildingsoneitherside?79.______

presentsanedictsignedwiththeGreatFifth'shandprint?80.______

A

TheImperialPalace

Whatstrikesonefirstinabirds-eyeviewofBeijingproperisavasttractofgoldenroofsflashingbrilliantlyinthesunwithpurplewallsoccasionallyemergingamidthemandastretchofluxurianttreeleavesflankingoneachside.ThatistheformerImperialPalace,popularlyknownastheForbiddenCity,fromwhichtwenty-fouremperorsoftheMingandQingDynastiesruledChinaforsome500years—from1420to1911.TheMingEmperorYongLe,whousurpedthethronefromhisnephewandmadeBeijingthecapital,ordereditsconstruction,onwhichapproximately10,000artistsandamillionworkmentoiledfor14yearsfrom1406to1420.Atpresent,thePalaceisanelaboratemuseumthatpresentsthelargestandmostcompleteensembleoftraditionalarchitecturecomplexandmorethan900,000piecesofcourttreasuresinalldynastiesinChina.

LocatedinthecenterofBeijing,theentirepalacearea,rectangularinshapeand72hectaresinsize,issurroundedbywallstenmetershighandamoat52meterswide.Ateachcornerofthewallstandsawatchtowerwithadouble-eaveroofcoveredwithyellowglazedtiles.

Themainbuildings,thesixgreathalls,onefollowingtheother,aresetfacingsouthalongthecentralnorth-southaxisfromtheMeridianGate,thesouthentrance,toShenwumen,thegreatgatepiercinginthenorthwall.Oneithersideofthepalacearemanycomparativelysmallbuildings.SymmetricallyinthenortheasternsectionliethesixEasternPalacesandinthenorthwesternsectionthesixWesternPalaces.ThePalaceareaisdividedintotwoparts:theOuterCourtandtheInnerPalace.Theformerconsistsofthefirstthreemainhalls,wheretheemperorreceivedhiscourtiersandconductedgrandceremonies,whilethelatterwasthelivingquartersfortheimperialresidence.AttherearoftheInnerPalaceistheImperialGardenwheretheemperorandhisfamilysoughtrecreation.

B

TheTempleofHeaven

TheTempleofHeavenwasinitiallybuiltinYongleYear18oftheMingDynasty(in1420).Situatedinthesouthernpartofthecity,itcoversthetotalareaof273hectares.WiththeadditionsandrebuildingduringtheMing,QingandotherDynasties,thisgrandsetofstructureslookmagnificentandglorious;thedignifiedenvironmentappearssolemnandrespectful.ItistheplaceforbothMingandQingDynasty'sEmperorstoworshipHeavenandprayforgoodharve

36.(67)

37.(76)

38.(70)

39.PartB

Directions:Inthefollowingarticlesomeparagraphshavebeenremoved.ForQuestions66-70,choosethemostsuitableparagraphfromthelistA-Ftofitintoeachofthenumberedgaps.Thereisoneparagraphwhichdoesnotfitinanyofthegaps.MarkyouranswersonANSWERSHEET1.

Inthefollowingarticlesomeparagraphshavebeenremoved.ForQuestions66～70,choosethemostsuitableparagraphfromthelistA～Ftofitintoeachofthenumberedgaps.Thereisoneparagraphwhichdoesnotfitinanyofthegaps.MarkyouranswersonANSWERSHEET1.

Fromhervantagepointshewatchedthemaindoorsswingopenandthefirstarrivalspourin.Thosewhohadbeenattheheadofthelinepausedmomentarilyonentry,lookedaroundcuriously,thenquicklymovedforwardasothersbehindpressedin.Withinmomentsthecentralpublicareaofthebigbranchbankwasfilledwithachattering,noisycrowd.Thebuilding,relativelyquietlessthanaminuteearlier,hadbecomeaBabel.Edwinasawatallheavysetblackmanwavesomedollarbillsandannounceloudly,"Iwanttoputmymoneyinthebank."

66.______

Itseemedasifthereportabouteveryonehavingcometoopenanaccounthadbeenaccurateafterall.

Edwinacouldseethebigmanleaningbackexpansively,stillholdinghisdollarbills.Hisvoicecutacrossthenoiseofotherconversationsandsheheardhimproclaim,"I'minnohurry.There'ssomethingI'dlikeyoutoexplain."

Twootherdeskswerequicklymannedbyotherclerks.Withequalspeed,longwidelinesofpeopleformedinfrontofthem.

Normally,threemembersofstaffwereampletohandlenewaccountbusiness,butobviouslyinadequatenow.EdwinacouldseeTottenhoeonthefarsideofthebankandcalledhimontheintercom.Sheinstructed,"Usemoredesksfornewaccountsandtakeallthestaffyoucansparetomanthem."

67.______

Tottenhoegrumbledinreply,"Yourealizewecan'tpossiblyprocessallthesepeopletoday,andhowevermanywedowilltieusupcompletely."

"I'vegotanidea,"Edwinasaid,"that'swhatsomeonehasinmind.Justhurrytheprocessingallyoucan."

68.______

First,anapplicationform.calledfordetailsofresidence,employment,socialsecurity,andfamilymatters.Aspecimensignaturewasobtained.Thenproofofidentitywasneeded.Afterthat,thenewaccountsclerkwouldtakealldocumentstoanofficerofthebankforapprovalandinitialing.Finally,asavingspassbookwasmadeoutoratemporarycheckbookissued.

Thereforethemostnewaccountsthatanybankemployeecouldopeninanhourwerefive,sothethreeclerkspresentlyworkingmighthandleasumofninetyinonebusinessday,iftheykeptgoingattopspeed,whichwasunlikely.

69.______

Stillthenoisewithinthebankincreased.Ithadbecomeanuproar.

Afurtherproblemwasthatthegrowingmassofarrivalsinthecentralpublicareaofthebankwaspreventingaccesstotellers'countersbyothercustomers.Edwinacouldseeafewofthemoutside,regardingthemillingscenewithconsternation.Whileshewatched,severalgaveupandwalkedaway.

Insidethebanksomeofthenewcomerswereengagingtellersinconversationandthetellers,havingnothingelsetodobecauseofthemelee,chattedback.Twoassistantmanagershadgonetothecentralfloorareaandweretryingtoconductthefloodofpeoplesoastoclearsomespaceatcounters.Theywerehavingsmallsuccess.

70.______

Shedecideditwastimeforherownintervention.

Edwinalefttheplatform.andafailed-offstaffareaand,withdifficulty,madeherwaythroughthemillingcrowdtothemainfrontdoor.

A.Yetsheknewhowevermuchtheyhurrieditwouldstilltaketentofifteenminutestoopenanysinglenewaccount.Italwaysdid.Thepaperwo

40.

TheviewsofVasariandHomeonBotticelli'sproductsare______.

A.identicalB.complementaryC.oppositeD.similar

四、閱讀理解(5題)41.

第

34

題

thedegradationofenvironmentcausesthechangeofclimate?__________

42.

第

42

題

doesnotofferanyscholarships?__________

43.

根據(jù)下列選項回答36～40題：

第

36

題

1.__________

44.

第

22

題

Theauthorimpliesinthesecondparagraphthat__________．

45.

根據(jù)下列文章回答26～30題：

第

26

題

Researchcarriedoutmtherecentopinionpollsshowsthat__________．

參考答案

1.Intreetrunk/Underneatharock.

2.B

3.One．

4.A

5.C

6.B

7.Male-and-femalerelationshipchanged．

8.Theirmemory．

9.B

10.B

11.Makebusinessefficient/achievegoal

12.C

13.B

14.A

15.A

16.andand解析：“both…and…”為固定搭配，“兩者都”。所以此處應(yīng)填“and”。

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

18.dodo解析：解析見上題，為了避免與前面的know重復(fù)，這里可以換做do。故答案為do。

19.asas解析：thinkofsth．a(chǎn)ssth．為固定短語，意為“把某物想成某物”。

20.whatwhat解析：這句話的意思是“這就是商家和賣者希望顧客們做的事情”，what引導(dǎo)的是一個表語從句，故答案為what。

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

22.notnot解析：此空前半句意為“我們真地生活在污染中，呼吸著它”，而后半句意為“它開始…我們的健康、幸福和文明。”顯然，這是因果關(guān)系，故中間的surprisingly前只能加個否定詞not。

23.butbut解析：此句意為“30歲的人表現(xiàn)出非常不同的握筆方式，…超過40歲的人都統(tǒng)一用三個手指握筆?！憋@然，此空處表轉(zhuǎn)折。

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.byby解析：此空所在短句意為“報酬經(jīng)常毀掉創(chuàng)造性，…鼓勵依賴他人的認可和禮物?！憋@然，空處應(yīng)填“通過”，在英語中介詞by即可表達此意。

26.D解析：由整篇短文的主旨“低鹽并不適于所有人”可知，此處“eventheveryvocal‘lowsalt’exponent”意為“即使是強力推薦的‘低鹽’”。

27.D解析：由短文第二段中的“…showedthatthosewithnormalbloodpressureunderwentnochangeatallwhenplacedonanextremelylow-saltdiet，…”可知。

28.B解析：由短文第三段第一句“Incometaxesarethemainsourceoffederalrevenues．”。

29.A解析：由整篇文章可知，本文主要傳達的信息為“食鹽致病理論沒有道理”。

30.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