2022年安徽省合肥市公共英語五級(筆試)知識點匯總（含答案）學校:________班級:________姓名:________考號:________

一、1.ListeningComprehension(15題)1.A15%～20%dropinbodywatercancausethebloodsystemtofail.

A.RightB.Wrong

2.Womenhavemorefatcellssowomenhavelesswater.

A.TrueB.Fasle

3.Studentscanenjoyasimplebookingandenrolmentprocedureinsomechains.

A.TrueB.Fasle

4.Chainsdon'tofferstudentsthechancetopursuetheirstudyfromonecountrytoanother.

A.RightB.Wrong

5.Waterisasimportantasvitamins,mineralsandproteinsforlife.

A.TrueB.Fasle

6.Withonlyagoodbookweareverylikelytofeellonely.

A.RightB.Wrong

7.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.1gotafewbooksfromthelibrarybuttheydidn'thelpverymuch.SoIdecidedtogotoeveningclassessothatIcouldlearnbasiccarpentryandelectricalwiring.

W：Whatsortofchangesdidyoumaketothehouse?

M：Firstofall,practicalthingstohelpPaul.Youneverreallyrealizetheproblemshandicappedpeoplehaveuntilitattacksyourownfamily.Mostgovernmentbuildings,forexample,havestepsuptothedoor.Theydon'tplanbuildingssothatdisabledpeoplecangetinandout.Weusedtoliveinaflat,andofcourse,itwastotallyunsuitable.Justimaginetheproblemsadisabledpersonwouldhaveinyourhouse.WeneededalargerhousewithwidecorridorssothatPaulcouldgetfromoneroomtoanother.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'vebecomeanexpertonthesubject.

ThoughPaulisdisabled,hemanagedtomovearoundinthehouse.

A.RightB.Wrong

8.Accordingtothespeaker,howdodeveloperscontributetothereductionofamphibianpopulation?

A.Bytakingoverponds.

B.Byconstructingsewers.

C.Bybuildingdamsonrivers.

D.Byfloodingmarshes.

9.Thetalkismainlyabouttheimportanceof"feltimages".

A.TrueB.Fasle

10.聽力原文：Inthefieldofmarketing，consumergoodsareclassedaccordingtothewayinwhichtheyarepurchased．Thetwomaincategoriesareconveniencegoodsandshoppinggoods．Twolessertypesarespecialtygoodsandunsoughtgoods．

Peopledonotspendmuchtimeshoppingforconvenienceitemssuchasgroceries，newspapers，toothpaste，razorblades，aspirin，andcandy．Thebuyingofconveniencegoodsmaybedoneroutinely，assomefamiliesbuygroceriesonceaweek．Suchregularlypurchaseditemsarecalledstaples．Sometimesconvenienceproductsareboughtonimpulse，forexample，someonehasasuddendesireforanicecreamsundaeonahotday．Ortheymaybepurchasedasemergencyitems．

Shoppinggoodsareitemsforwhichcustomerssearch．Theycompareprices，quality，andstyles，andmayvisitanumberofstoresbeforemakingdecisions．Buyinganautomobileisoftendonethisway．

Shoppinggoodsfallintotwoclasses：thosethatareperceivedasbasicallythesameandthosethatareregardedasdifferent．Itemsthatarelookeduponasbasicallythesameincludesuchthingsashomeappliances，televisionsets，andautomobiles．Havingdecidedonthemodeldesired，thecustomerisprimarilyinterestedingettingtheitematthemostfavorableprice．Itemsregardedasinherentlydifferentincludeclothing，furniture，anddishes．Quality，style.andfashionwilleithertakeprecedenceoverprice，ortheywillnotmatteratall．

Specialtygoodshavecharacteristicsthatimpelcustomerstomakespecialeffortstofindthem．Pricemaybenoconsiderationatall.Specialtygoodscanincludealmostanykindofproduct．Normally，specialtygoodshaveabrandnameorotherdistinguishingcharacteristics．

Unsoughtgoodsareitemsaconsumerdoesnotnecessarilywantorneedormaynotevenknowabout．Promotionoradvertisingbringssuchgoodstotheconsumer'sattention．Theproductcouldbesomethingnewonthemarketoritmaybeafairlystandardservice．suchaslifeinsurance．forwhichmostpeoplewillusuallynotbothershopping．

Accordingtothespeaker，whatareconveniencegoods?

A.Commoditiesthatpeopleareinconstantneedof．

B.Goodsthatareconvenienttouseorpurchase．

C.Itemsthatpeopletendtobuyunderimpulse．

D.Itemsthathavetobeboughtonceaweek．

11.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

12.聽力原文：Yesterdaywediscussedtheproblemofrisingprices,or,intheeconomist'sterms,inflation.Wenotedthat,duringperiodsofinflation,allpricesandincomesdonotriseatthesamerate.Someincomesrisemoreslowlythanthecostofliving,andafewdonotriseatall.Otherincomesrisemorerapidlythanthecostofliving.

Weconcludedthatpersonswithfixedincomes,forexample,theelderlywhodependuponpensions,andpersonswithslow-risingincomesas,forexample,anemployeewithasalaryagreedtoinalong-termcontract,willbemostseriouslyaffectedbyinflation.Pleaserememberthatwhiletheirdollarincomes,staythesame,thecostofgoodsandservicesrises,andineffect,realincomedecreases,thatis,theyareabletopurchaselesswiththesameamountofmoney.

Wealsotalkedaboutthefactthatstockholdersandpersonswithbusinessinterestsandinvestmentswouldprobablybenefitmostfrominflation,sincehighpriceswouldincreasesalesreceipts,andprofitswouldlikelyrisefasterthanthecostofliving.

Andnow,beforewebegintoday'slecture,arethereanyquestionsabouttheterm,inflationoranyoftheexamplesgiveninourdiscussionsofar?

What'sthemainpurposeofthetalk?

A.Tointroducetheconceptofinflation.

B.Todiscussthecausesofinflation.

C.Toreviewyesterday'slectureoninflation.

D.Toargueinfavorofinflation.

13.WhereisLowTillFarmingbecomingpopular?

A.Inareaswithfewweedsandunwantedplants.

B.Inareaswithasevereshortageofwater.

C.Inareaslackinginchemicalfertilizer.

D.Inareasdependentonimportedfood.

14.HowmanypeopledependonlocalriceandfoodinSouthAsiacurrently?

A.Morethan150millionpeople.

B.Lessthan150millionpeople.

C.About100millionpeople.

D.About120millionpeople.

15.InwhichyeardidColumbustakechilipeppertoSpain?

二、2.UseofEnglish(10題)16.(49)

17.

【C7】

18.

【C12】

19.

【C19】

20.(42)

21.(46)

22.Psychologiststakecontrastiveviewsofhowexternalrewards,from【31】______praisetocoldcash,affectmotivationandcreativity.Behaviorists,【32】______researchtherelation【33】______actionsandtheirconsequencesarguethatrewardscanimproveperformanceatworkandschool.Cognitiveresearchers,whostudyvariousaspectsofmentallife,maintain【34】______rewardsoftendestroycreativity【35】______encouragingdependence【36】______approvalandgiftsfromothers.

Thelatterviewhasgainedmanysupporters,especially【37】______educators.Butthecarefuluseofsmallmonetaryrewardssparks【38】______ingrade-schoolchildren,suggesting【39】______properlypresentedinducementsindeedaidinventiveness,【40】______toastudyintheJuneJournalofPersonalityandSocialPsychology"Ifkidsknowthey'reworkingfora【41】______andcanfocus【42】______arelativelychallengingtask,theyshowthemostcreativity",saysRobertEisenbergeroftheUniversityofDelawareinNewark."Butit'seasytokillcreativitybygivingrewardsfor【43】______performanceorcreatingtoo【44】______anticipationforrewards."

Ateacher【45】______continuallydrawsattentiontorewardsorwhohands【46】______highgradesforordinaryachievementendsup【47】______discouragedstudents,Eisenbergerholds.【48】______anexampleofthelatterpoint,henotesgrowingeffortsatmajoruniversitiestotightengradingstandardsandrestorefailing【49】Inearliergrades,theuseofso-calledtokeneconomies,in【50】______studentshandlechallengingproblemsandreceiveperformance-basedpointstowardvaluedrewards,showspromiseinraisingeffortandcreativity,theDelawarepsychologistclaims.

(31)

23.(44)

24.

【C11】

25.

【C6】

三、3.ReadingComprehension(15題)26.(75)

27.

Intheirstudy,researchersledbyPierreMaquettookadvantageofthetechniqueof______.

A.exposingalong-heldfolkwisdom

B.clarifyingthepredictionsondreams

C.makingcontrastsandcomparisons

D.correlatingeffectswiththeircauses

28.(78)

29.TheissueofonlineprivacyintheInternetagefoundnewurgencyfollowingtheSept.11terroristattacks,sparkingdebateoverstrikingthecorrectbalancebetweenprotectingcivillibertiesandattemptingtopreventanothertragicterroristact.Whilepreventingterrorismcertainlyisofparamountimportance,privacyrightsshouldnotbedeemedirrelevant.

Inresponsetotheattacks,Congressquicklypassedlegislationthatincludedprovisionsexpandingrightsofinvestigatorstointerceptwire,oralandelectroniccommunicationsofallegedhackersandterrorists.CivillibertiesgroupsexpressedconcernsovertheprovisionsandurgedcautioninensuringthateffortstoprotectournationdonotresultinbroadgovernmentauthoritytoerodeprivacyrightsofU.S.citizens.Nevertheless,causingfurtherconcerntocivillibertiesgroups,theDepartmentofJusticeproposedexceptionstotheattorney-clientprivilege.OnOct.30,AttorneyGeneralJohnAshcroftapprovedaninterimagencyrulethatwouldpermitfederalprisonauthoritiestomonitorwireandelectroniccommunicationsbetweenlawyersandtheirclientsinfederalcustody,includingthosewhohavebeendetainedbutnotchargedwithanycrime,wheneversurveillanceisdeemednecessarytopreventviolenceorterrorism.

Inlightofthisbroadeningefforttoreachintocommunicationsthatwerepreviouslybelievedtobe"off-limits",theissueofonlineprivacyisnowanevenmorepressingconcern.Congresshastakensomelegislativestepstowardensuringonlineprivacy,includingtheChildren'sOnlinePrivacyProtectionAct,andprovidedprivacyprotectionsforcertainsectorsthroughlegislationsuchastheFinancialServicesModernizationAct.Thelegislationpassedtodatedoesnot,however,provideastatutoryschemeforprotectinggeneralonlineconsumerprivacy.Lackingdefinitivefederallaw,somestatespassedtheirownmeasures.Butmuchofthislegislationisincompleteornotenforced.Moreover,itbecomesunworkablewhenstatescreatedifferentprivacystandards;theInternetdoesnotknowgeographicboundaries,andcompaniesandindividualscannotbeexpectedtocomplywithdiffering,andattimesconflicting,privacyrules.

Ananalysisearlierthisyearof751U.S.andinternationalWebsitesconductedbyConsumersInternationalfoundthatmostsitescollectpersonalinformationbutfailtotellconsumershowthatdatawillbeused,howsecurityismaintainedandwhatrightsconsumershaveovertheirowninformation.

Ataminimum,CongressshouldpasslegislationrequiringWebsitestodisplayprivacypoliciesprominently,inform.consumersofthemethodsemployedtocollectclientdata,allowcustomerstooptoutofsuchdatacollection,andprovidecustomeraccesstotheirowndatathathasalreadybeencollected.AlthoughvariousInternetprivacybillswereintroducedinthe107thCongress,thefocusshiftedtoexpandinggovernmentsurveillanceinthewakeoftheterroristattacks.Plainly,governmenteffortstopreventterrorismareappropriate.Exactlyhowtheseexigentcircumstanceschangethenatureoftheonlineprivacydebateisstilltobeseen.

Concerningtheprotectionofprivacyandincreasedsurveillanceofcommunication,theauthorseemstoinsiston______.

A.theprioriyoftheformeraction

B.theexecutionofthelatterattheexpenseoftheformer

C.tighteningbothpoliciesatthesametime

D.abalancebetweenthetwoactions

30.(77)

31.PartA

Directions:ReadthefollowingtextsandanswerthequestionswhichaccompanythembychoosingA,B,CorD.MarkyouranswersonANSWERSHEET1.

Whenitcomestotheslowingeconomy,EllenSperoisn'tbitinghernailsjustyet.Butthe47-year-oldmanicuristisn'tcutting,fillingorpolishingasmanynailsasshe'dliketo,either.Mostofherclientsspend$12to$50weekly,butlastmonthtwolongtimecustomerssuddenlystoppedshowingup.Speroblamesthesofteningeconomy.…Imagoodeconomicindicator,”shesays,“Iprovideaservicethatpeoplecandowithoutwhenthey'reconcernedaboutsavingsomedollars.”SoSperoisdownscaling,shoppingatmiddle-browDillard'sdepartmentstorenearhersuburbanClevelandhome,insteadofNeimanMarcus.“Idon'tknowifotherclientsaregoingtoabandonme,too.”shesays.

EvenbeforeAlanGreenspan'sadmissionthatAmerica'sred-hoteconomyiscooling,lotsofworkingfolkshadalreadyseensignsoftheslowdownthemselves.Fromcardealershipstogapoutlets,saleshavebeenlaggingformonthsasshopperstempertheirspending.Forretailers,wholastyeartookin24percentoftheirrevenuebetweenThanksgivingandChristmas,thecautiousapproachiscomingatacrucialtime.Already,expertssay,holidaysalesareoff7percentfromlastyear'space.Butdon'tsoundanyalarmsjustyet.Consumersseemonlyconcerned,notpanicked,andmanysaytheyremainoptimisticabouttheeconomy'slong-termprospects,evenastheydosomemodestbelt-tightening.

Consumerssaythey'renotindespairbecause,despitethedreadfulheadlines,theirownfortunesstillfeelprettygood.InManhattan,“there'sanewgoldrushhappeninginthe$4millionto$10millionrange,predominantlyfedbyWallStreetbonuses,”saysbrokerBarbaraCorcoran.InSanFrancisco,pricesarestillrisingevenasfrenziedoverbiddingquiets.“Insteadof20to30offers,nowmaybeyouonlygettwoorthree,”saysJohnDeadly,aBayAreareal-estatebroker.Andmostfolksstillfeelprettycomfortableabouttheirabilitytofindandkeepajob.

Manyfolksseesilverliningstothisslowdown.Potentialhomebuyerswouldcheerforlowerinterestrates.Employerswouldn'tmindalittlefewerbubblesinthejobmarket.Manyconsumersseemtohavebeeninfluencedbystock-marketswings,whichinvestorsnowviewasanecessaryingredienttoasustainedboom.Dinersmightseeanupside,too.GettingatableatManhattan'shotnewAlainDucasserestaurantneedtobeimpossible.Notanymore.Forthat,Greenspan&Co.maystillbeworthtoasting.

By“EllenSperoisn'tbitinghernailsjustyet”(Line1,Paragraph1),theauthormeans______.

A.Sperocanhardlymaintainherbusiness

B.Speroistoomuchengagedinherwork

C.Sperohasgrownoutofherbadhabit

D.Speroisnotinadesperatesituation

32.

Thelanguageofthepassageismostly______.

A.descriptiveB.narrativeC.expositiveD.critic

33.Women'smindsworkdifferentlyfrommen's.Atleast,thatiswhatmostmenareconvincedof.Psychologistsviewthesubjecteitherasamatterorfrustrationorajoke.Nowthebiologistshavemovedintothisminefield,andsomeofthemhavefoundthattherearerealdifferencesbetweenthebrainsofmenandwomen.Butbeingdifferent,theypointouthurriedly,isnotthesameasbeingbetterorworse.

Thereis,however,adefinitestructuralvariationbetweenthemaleandfemalebrain.Thedifferenceisinapartofthebrainthatisusedinthemostcomplexintellectualprocesses—thelinkbetweenthetwohalvesofthebrain.

Thetwohalvesarelinkedbyatrunklineofbetween200and300millionnerves,thecorpuscallosum.Scientistshavefoundquiterecentlythatthecorpuscallosuminwomenisalwayslargerandprobablyricherinnervefibersthanitisinmen.Thisisthefirsttimethatastructuraldifferencehasbeenfoundbetweenthebrainsofwomenandmenanditmusthavesomesignificance.Thequestionis"What?",and,ifthisdifferenceexists,arethereothers?Re-searchshowsthatpresent-daywomenthinkdifferentlyandbehavedifferentlyfrommen.Aresomeofthesedifferencesbiologicalandinborn,aresultofevolution?Wetendtothinkthatistheinfluenceofsocietythatproducesthesedifferences.Butcouldwebewrong?

Researchshowedthatthesetwohalvesofthebrainhaddifferentfunctions,andthatthecorpuscallosumenabledthemtoworktogether.Formostpeople,thelefthalfisusedforwordhanding,analyticalandlogicalactivities;therighthalfworksonpictures,patternsandforms.Weneedbothhalvesworkingtogether.Andthebettertheconnections,themoreharmoniouslythetwohalveswork.And,accordingtoresearchfindings,womenhavethebetterconnections.

Butitisn'tallthateasytoexplaintheactualdifferencesbetweenskillsofmenandwomenonthisbasis.Inschoolsthroughouttheworldgirlstendtobebetterthanboysat"languagesubjects"andboysbetteratmathsandphysics.Ifthesedifferencescorrespondwiththedifferencesinthehemispherictrunkline,thereisanunalterabledistinctionbetweenthesexes.

Weshan'tknowforawhile,partlybecausewedon'tknowofanypreciserelationshipbetweenabilitiesinschoolsubjectandthefunctioningofthetwohalvesofthebrain,andwecannotunderstandhowthetwohalvesinter-actviathecorpuscallosum.Butthisstrikingdifferencemusthavesomeeffectand,becausethedifferenceisinthepartsofthebraininvolvedinintellect,weshouldbelookingfordifferencesinintellectualprocessing.

WhichofthefollowingstatementsisCORRECT?

A.Biologistsareconductingresearchwherepsychologistshavegivenup.

B.Braindifferencespointtosuperiorityofonesexovertheother.

C.Resultsofscientificresearchfailtosupportpopularbelief.

D.Thestructuraldifferenceinthebrainbetweenthesexeshaslongbeenknown.

34.(74)

35.

Whichofthefollowingistrueaccordingtothetext?

A.Ashanthineedstoreceivegene-therapytreatmentconstantly.

B.Despitethehugefunding,generesearcheshaveshownfewpromises.

C.Therapeuticgenesarecarriedbyharmlessviruses.

D.Gene-dopingisencouragedbyworldagenciestohelpathletesgetbetterscores.

36.ShortagesoffluvaccinearenothingnewinAmerica,butthisyear'sisawhopper.Untillastweek,itappearedthat100millionAmericanswouldhaveaccesstoflushotsthisfall.ThenBritishauthorities,concernedaboutquality-controlproblemsataproductionplantinLiverpool,barredallfurthershipmentsbytheChironCorp.Overnight,theU.S.vaccinesupplydwindledbynearlyhalfandfederalhealthofficialsfoundthemselvesmakinganunusualplea.Insteadofbeseechingusalltogetvaccinated,they'renowurgingmosthealthypeoplebetweentheagesof2and64notto."Thisreemphasizesthefragilityofourvaccinesupply,"saysDr.MartinMyersoftheNationalNetworkforImmunizationInformation,"andthelackofredundancyinoursystem."

Whyissuchabasichealthservicesoeasilyknockedout?Mainlybecauseprivatecompanieshavehadlittleincentivetopursueit.Tocreateasingledoseoffluvaccine,amanufacturerhastogrowlivevirusina2-week-oldfertilizedchickenegg,thencracktheegg,harvestthevirusandextracttheproteinsusedtoprovokeanimmunere-sponse.Profitmarginsarenarrow,demandisfickleand,becauseeachyear'sfluvirusisdifferent,anyleftovervaccinegoestowaste.Asaresult,theUnitedStatesnowhasonlytwomajorsuppliers(ChironandAventisPasteur)—andwhenoneofthemrunsintotrouble,thereisn'tmuchtheothercandoaboutit."Avaccinemakercan'tjustcallupandorder40millionmorefertilizedeggs,"saysManonCox,ofConnecticut-basedProteinSciencesCorp."There'sawholeindustrythat'sscheduledtoproduceacertainnumberofeggsatacertaintime."

Sleekertechnologiesarenowintheworks,andexpertsarehopingthatthisyear'sfiascowillspeedthepaceofinnovation.Themainchallengeistoshiftproductionfromeggsintocellcultures—amediumalreadyusedtomakemostothervaccines.Fluvaccinesareharderthanmosttoproducethisway,butseveralbiotechcompaniesarenowpursuingthisstrategy,andoneculture-basedproduct(SolvayPharmaceuticals'Invivac)hasbeenclearedformarketinginEurope.

ForAmericans,theimmediatechallengeistomakethemostofalimitedsupply.Thegovernmentestimatesthat95millionpeoplestillqualifyforshotsunderthevoluntaryrestrictionsannouncedlastweek.That'snearlytwicethenumberofdosesthatclinicswillhaveonhand,butonly60millionAmericansseekoutshotsinanormalyear.Infact,manyexpertsarehopingtheshortagewillserveasanawarenesscampaign—encouragingthepeoplewhoreallyneedaflushottogetone.

Shortagesoffluevaccineshowthat______.

A.Americareliestoomuchonforeignsuppliers

B.thedemandoffluevaccinesishighthisyear

C.qualityproblemisaseriousprobleminfluvaccineproduction

D.thesupplyoffluvaccinesisr