2022年內(nèi)蒙古自治區(qū)錫林郭勒盟公共英語(yǔ)五級(jí)(筆試)模擬考試(含答案)

2022年內(nèi)蒙古自治區(qū)錫林郭勒盟公共英語(yǔ)五級(jí)(筆試)模擬考試(含答案)學(xué)校:________班級(jí):________姓名:________考號(hào):________

一、1.ListeningComprehension(15題)1.HowmanypsychologicaltypesofpeoplearethereaccordingtoJung'sideas?

2.What'sthecommonmisconceptionaboutartandscience?

3.聽(tīng)力原文：Now,letmefirstgiveyouabriefintroductiontotheAmericanpoet,EmilyDickinson.EmilyDickinsonwasAmerica'sbest-knownfemalepoetandoneoftheforemostauthorsinAmericanliterature.BorninAmherst,Massachusetts,Dickinsonwasthemiddlechildofaprominentlawyerandone-termUnitedStatescongressionalrepresentative,EdwardDickinson,andhiswife,EmilyNorcrossDickinson.From1840to1847sheattendedtheAmherstAcademy,andfrom1847to1848shestudiedattheMountHolyokeFemaleSeminary(nowMountHolyokeCollege)inSouthHadley,afewtripstoBostonforeyetreatmentsintheearly1860s,DickinsonremainedinAmherst,livinginthesamehouseonMainStreetfrom1855untilherdeath.Duringherlifetime,shepublishedonlyabout10ofhernearly2,000poems,innewspapers,CivilWarjournals,andapoetryanthology.ThefirstvolumeofPoemsofEmilyDickinsonwaspublishedin1890,afterDickinson'sdeath.

AlthoughfewofDickinson'spoemswereformallypublishedduringherlifetime,sheherself"published"bysendingoutatleastone-thirdofherpoemsinthemorethan1,000lettersshewrotetoatleast100differentcorrespondents.Dickinson'smethodofbindingabout800.ofherpoemsinto40manuscript.booksanddistributingseveralhundredoftheminlettersisnowwidelyrecognizedasherparticularform.ofself-publication.Shealsoreadherpoemsaloudtoseveralpeople,includinghercousinsLouiseandFrancesNorcross,overaperiodofthreedecades.

Well,that'sallaboutherlife.Nowshallweconcentrateonherfamouspoem,"SuccessisCountedSweetest".

InwhichstatewasEmilyDicksonborn?

A.Michigan.B.Ohio.C.Massachusetts.D.Washington.

4.PartC

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

Younowhave1minutetoreadQuestions21-30.

聽(tīng)力原文：Inyouruniversitywork．youwillbeexpectedtogiveoralpresentationsintheform.ofreportsorsimplyintheformsofanswerstoquestions．Thereareseveralthingsyouoraldotomakeyouroralpresentationsclearandeasytounderstand．

Thefundamentalpointtorealizeisthatspeechandwritingaredifferent．Ifyouwanttobebestunderstood．youcan'tsimplyreadyourwrittenreportaloud．Thebiggestdifferencebetweenspokenandwrittenlanguageisthatreaderscanlookbackovertheprintedwordswhentheydon'tunderstand．Inspokenlanguage，however，listenerscan'tgobackandcheckthewords．Theycanrelyonlyonmemory．Sothefirstprincipletokeepinmindwhenyou'replanningtospeakinpublicisthatyouhavetohelpthelistener'smemory．Thismeansthatanoralreportcan'tdeliverinformationasrapidlyasawrittenreport．Thatis，youcan'thaveasmanypiecesofnewinformationpackedintothesamenumberofwords，becausetheywillcomeattoofastarateforthelistenertounderstand．

Inanoralreport，therateofdeliveryhastobeslower．Oneofthebestwaystohelpyouraudienceissimplytospeakslowly．Manypeoplespeaktoofastwhentheyspeaktoagroup．Thisisamistake，especiallyifyouhaveaforeignaccent，becauseitmakeslisteningmoredifficult．Beyondthesimpletechniqueofspeakingmoreslowlywhenyouspeakbeforeagroup，therearewaysoforganizingyourpresentationthatcanhelpthelistenerbeclearandunderstandyourmainpoints．

Theorganizationofyourtalkshouldallowenoughtimeforthelistenertothinkbothbeforeandaftereachnewidea．Thepurposeofthetimebeforethenewinformationistogivetheaudienceachancetounderstandthebackgroundclearly．Knowledgeofthebackground，orsettingoftheinformation，makesitmucheasiertoanticipatewhatkindofinformationiscomingnext．Ifthenewinformationoccurstooearly，withoutenoughbackground，thelistenersshouldnotbepreparedwithenoughbackgroundtobeabletopredictwhat'scoming．

I'vebeendescribingthetimeforthinkingbeforethenewinformation．It'salsoimportanttoprovidetimeforthinkingafterthenewinformation．Thisthinkingtimeallowslistenerstofittheideaintotheirgeneralknowledgeofthesubject．Thinkingtimegivesthelistenerachancetomakesurethattheideawasunderstoodbeforegoingontothenextnewidea．

Therearethreegeneralwaystogivethelistenertimeforthinkingandtimeafterapointofnewinformation．Onewayissimplytopause．Amomentofsilencegivesthelistenertimetotakeinthenewinformation，butthereareotherways．Asecondmethodistouseaparaphrase．Thatis，yousaythesamething，butindifferentwords．Thisparaphrase，orrepetitionoftheidea，helpsthelistenerstofixthethoughtintheirmemory．Athirdwaytogivethelistenertimetothinkistousewordsthatdon'tmeanmuch．Thesearewordsthatconveynoinformation，butjustfillintime．Forinstance，youmightsaysomethinglike“asI'vebeensaying”or“andsoforth”and“andsoon”．Thatkindofexpressiondoesn'treallysayanything．It'sjustmadeofwhatwecall“fillerwords”．Thewordshavenorealmeaning．buttheydoperform.ausefulfunction．sincetheyallowthelistenertimetothink．

Insummary，then，weknowthatorallanguageshoulddeliverinformationataslowerratethanyoucanuseinwrittenlanguage．Newinformationshouldbepresentedmoregradually．Thinkingtimeshouldbeprovidedbothbeforeandaftereachimportantnewitem．Thetimebeforeistoprovideabackgroundsothatthelistenerscanhaveachancetoanticipat

5.Accordingtothespeaker,whydopesticidesposeathreattoamphibians?

A.Pesticidescancauseanamphibian'sskintodryout.

B.Pesticideskilltheinsectsthatamphibiansdependonforfood.

C.Dissolvedpesticidescaneasilyenteramphibian'sbodies.

D.Amphibiansmayeatplantsthathavebeentreatedwithpesticides.

6.HowmanypeopledependonlocalriceandfoodinSouthAsiacurrently?

A.Morethan150millionpeople.

B.Lessthan150millionpeople.

C.About100millionpeople.

D.About120millionpeople.

7.PartA

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

聽(tīng)力原文：Goodmorning!

Um...AsManagingDirectorofourcompanyI'vebeenaskedtosayafewwordstoyoutodayaboutthewaythecompanyisorganized.SowhatI'vedoneistomakeasortoftable...youknow...toshowhowitisallarranged.It'sinyourbooks.Canyoufindit?

OK.Now,notallcompaniesareorganizedinthesameway,ofcourse.Theyallhavemoreorlessthesamebitsandpieces,buttheyputthemtogetherindifferentways.Infact,someManagingDirectorsarealwayschangingtheorganization,whichcanbeverydisturbingforeverybodyelseandsometimescausesawfulhold-ups.Sometimesit'snecessary,ofcourse,likewhenyoustartmakingsomethingdifferentorjoinupwithanothercompanyorsomething.Anyway,Ithinktheorganizationofmycompanyisfairlytypical,solet'stakealookathowwehaveorganizedit.

Atthetopofthescheme,aboveme,istheBoardofDirectors.Theirjobistoadministratethecompany,makegeneralpolicies,andsoon.Therearetwokindsofdirectors,actually.Onekindiswhatwecallnon-executivedirectors,whichmeansthattheyarenotfull-timeemployees.Theyarethesortofpeoplewhohavesomestandinginvariouspartsofthebusinessworldandareinapositiontohelpthecompanytosucceed.TheyonlyappearwhentherearemeetingsoftheBoard,andsomeofthemareontheboardsofothercompaniesatthesametime.Butthesecondlotofdirectors—theexecutivedirectors—arefull-timeemployeesofthecompany.Mostofthemaremanagersofourvariousdepartments,andyou'llbemeetingthemlater.

Theabsoluteheadofthecompany,ofcourse,istheChairmanoftheBoard.HeisappointedbytheBoard,andhisjobistotakethechairatmeetingsoftheshareholdersandtheBoardofDirectors,andtorepresentthecompany'sinterestsatoutsidefunctions.Hedoesnottakemuchpartintherunningofthebusiness.Heleavesmetogetonwiththejob.Mindyou,notallchairmenarelikethat.Ourlastonewasarealpain,alwayswantedeverythingdonehisownwayandhekeptoninterfering...butanyway,that'swhatthetopslotintheschemeisfor.

Thenthere'sme,theManagingDirector,orMDforshort—aslongasyoudon'tthinkI'madoctorofmedicine,haha...Um...Now,myjobistocoordinatethepoliciesdecidedbythedirectorsandseethattheyarecarriedout.Idothisthroughthevariousmanagersofdepartments—departmentalmanagers.AtthemomentI'vegotsix,andthereareslotsforthemalongthelineunderneathmeinyourscheme.Idon'tthinktheyareinanyparticularorder,sowe'llstartfromtheleftandwalkacross.Actually,they'reallgoingtocomeandtellyouabouttheirjobs.SoI'lljustsayafewwords.And...Right.Thefirstoneis...

Thespeechismainlyabouttheorganizationofthecompany.

A.TrueB.Fasle

8.Ifaconsumerwantsaquicksettlementoftheproblem,whomisitbettertocomplainto?

A.Ashopassistant.

B.Thestoremanager.

C.Themanufacturer.

D.Apublicorganization.

9.Whydoesthespeakersuggestwerisewithayawnandstretch?

A.Becauseitwillhelpkeepyourenergyfortheday'swork.

B.Becauseitwillhelpyoutocontrolyourtemperearlyintheday.

C.Becauseitwillhelpyoutoconcentrateonyourroutinework.

D.Becauseitwillkeepyourenergycycleundercontrolallday.

10.Whataretheshoppinggoodsthatarebasicallyconsideredthesame?

A.Thosethatsatisfysimilarneedsoftheconsumer.

B.Thosethatconsumersdon'tcarewheretobuy.

C.Thosethatconsumersspendmuchtimelookingfor.

D.Thosethatcanbefoundeverywhere.

11.Afterdeliveringthenewinformation,whyshouldthespeakeralsogivehisaudiencesometime?

12.聽(tīng)力原文：M：Soyoureallybelievethatclothescarryakindofmessageforotherpeopleandthatwhatweputonisinsomewayareflectionofwhatwefeel?

W：Ohyes，verymuchso．Nowpeoplearebeginningtotakeseriouslytheideaofakindofpsychologyofclothing，tobelievethatthereisnotjustindividualtasteinourclothesbutalsoathinkingbehindwhatwewearwhichistryingtoexpresssomethingwemaynotevenbeawareofourselves．

M：Butsurelythishasalwaysbeenthecase．Wealldressupwhenwewanttoimpresssomeone，suchasforajobinterviewwithaprospectiveemployer；wethenmakeaneffortandputonsomethingsmart．

W：True,butthat'saconsciousact．WhatIamtalkingaboutismoreofasubconsciousthing．Takeforexamplethestudentwhoisawayfromhomeatcollegeoruniversity：ifhetendstowraphimselfupmorethantheothers，thisisbecauseheisprobablyfeelinghomesick．Similarly，ageneralfeelingofinsecuritycansometimestaketheform.ofoverdressinginwarmerclothesthannecessary．

M：Canyougiveanyotherexamples?

W：Yes．Ithinkpeoplewhoaresociableandoutgoingtendtodressinanextrovertedway，preferringbrighterormoredazzlingcolorsyellows，brightreds，andsoon．Inthesameway，whatmightbeseenasaparallelwiththeanimalkingdom，aggressiveclothesmightindicateanaggressivepersonalityorattitudetolife．Thinkaboutthethreatdisplaysusedbyanimalswhentheywanttowarnoffopponents．

M：Doyouthinkthecareorlackofitoverthewayweactuallywearourclotheshasanythingtotellus?

W：Yes，indeed．Thelength，forexample，ofaman'strousersspeaksvolumesabouthisawarenessofhisownimage．Or，ifhistrousersaretooshortorhangingloosely，thisprobablymeanshe'sabsorbedbyotherthings．

Accordingtothewoman,whatgovernstheclotheswewear?

A.Adesiretoexpressoneselfandshowone'swealth.

B.Individualtasteandloveforbeauty.

C.Loveforbeautyandadesiretoimpressotherpeople.

D.Individualtasteandadesiretoexpressoneself.

13.Accordingtothefigureoftheacademicyear1995/96，wheredothelargestnumberofforeignstudentscomefrom?

14.AlldirectorsontheBoardarefull-timeemployeesinthecompany．

A.RightB.Wrong

15.ThechairmanoftheBoardisappointedbytheBoard．

A.RightB.Wrong

二、2.UseofEnglish(10題)16.RecentsurveysshowthatJapaneseyouthhavebecomea"MeGeneration"thatrejectstraditionalvalues.

"Around1980manyJapanese,【31】______youngpeopleabandonedthevaluesofeconomicsuccessandbegan【32】______fornewsetsofvaluesto【33】______themhappiness,"writessociologistYasuhiroinComparativeCivilizationsReview.Japaneseyouthareplacingmoreimportanceontheindividual'spursuitof【34】______andlessonthevaluesofwork,family,andsociety.

Japanesestudentsseemtobelosingpatiencewithwork,【35】______theircounterpartsintheUnitedStatesandKorea.Ina1993【36】______ofcollegestudentsinthethreecountries,only10%oftheJapaneseregarded【37】______asaprimaryvaluecomparedwith47%ofKoreanstudentsand27%ofAmericanstudents.Agreater【38】______ofJapaneseaged18—24alsopreferredeasyjobs【39】______heavyresponsibility.

TheyoungerJapaneseare.showinglessconcernforfamilyvaluesastheypursueaninnerworldofprivatesatisfaction.Datacollected【40】______theJapanesegovernmentin1993showsthatonly23%ofJapaneseyoutharethinkingaboutsupportingtheiragedparents,incontrast【41】______63%ofyoungAmericans.Itappearsthatmanyyounger-generationJapaneseare【42】______bothrespectfortheirparents【43】______asenseofresponsibilitytothefamily.AuthorYoshizakiattributesthechange【44】______Japaneseparents'over-indulgenceoftheirchildren,materialaffluence,andgrowing【45】______forprivatematters.

Theshift【46】______individualismamongJapaneseismostpronouncedamong【47】______veryyoung.

Accordingto1991data【48】______theBunkaCenterofJapan,50%ofJapaneseyouthaged16—19canbelabeled"self-centered"comparedwith33%among【49】______aged25-29.Toearntheself-centeredlabel,theyoungpeoplerespondedpositivelyto【50】______ideasas"Iwouldliketomakedecisionswithoutconsideringtraditionalvalues"and"Idon'twanttodoanythingIcan'tenjoydoing."

(31)

17.

【C4】

18.

【C5】

19.Impatiencecharacterizesyoungintellectualworkers.Theywanttomaketheirmark【C1】______.Soit'simportanttoget【C2】______totheminachallengingmannertheidea【C3】______bigachievementsrarelycomeeasilyandquickly.Pointoutthatthelittlesuccessesareessential.Showthatthey【C4】______turnbecomethefoundationon【C5】______reputationsarebuiltandfromwhichmoreimportanttaskscanbeaccomplished.

Avarietyofjobassignments,includingjoborprojectrotation,alsokeepajob【C6】______becomingdull.Whereasit'snaturalforsomeindividualstowanttomoveaheadimmediatelytomoredifficultassignments,【C7】______properguidancetheycancontinuetolearnandtogainversatilitybyworkingonanumberofjobsthatareessentially【C8】______thesamecomplexity.Thiswaytheygainbreadth,ifnotdepth.

Probablythegreatestoffensetoguard【C9】______whendealingwithyoungerspecialistsistorejectideasoutofhand.Youmustlisten--andlistenobjectively--totheirsuggestions.Avoid【C10】______overcritical.Youwanttonurtureaninquiringmindwithafreshapproach.You'llfrustrateitquicklyifyoureverttoooften【C11】______"We'vetriedthatbeforeanditwon't【C12】______here."

Onesurewaytodisenchant【C13】______collegegraduatesisflagrantlymisusingtheirtalents.Expectthemtodosomeroutinework,ofcourse.Butdon'tmaketheir【C14】______workjustonelongseriesoferrands.Thisincludessuchbreak-inassignments【C15】______performingroutinecalculations,diggingup【C16】______material,【C17】______operatingreproductionequipment.Onelargemanufacturingcompanyrecentlyinterviewedanumberof【C18】______engineerswhohadleftthem.Thecompanyfoundthattheoverwhelmingcomplaintwasthatthecompanynotonlydidnotofferworkthat【C19】______challengingbutalsoexpected【C20】______toolittlefromtheminthewayofperformance.

【C1】

20.

【C15】

21.

【C19】

22.(36)

23.(43)

24.(33)

25.

【C2】

三、3.ReadingComprehension(15題)26.

Theauthorimpliesthatwhichofthefollowingischaracteristicofmanyemployeehealthinsuranceplans?

A.Theycoverallthecommonmedicalconditionsaffectingmen,butonlysomeofthoseaffectingwomen.

B.Theylackthespecialprovisionsforwomenworkersthatproposedspeciallaborlawsforwomenwouldprovide.

C.Theypaythemedicalcostsassociatedwithpregnancyandchildbirthonlyforthespousesofmaleemployees,notforfemaleemployees.

D.Theymeetminimumlegalrequirements,butdonotadequatelysafeguardthehealthofeithermaleorfemaleemployees.

27.

Thelastparagraphsuggeststhat______.

A.manyrecruitinglettersfailedtoprovideMackReiterwithscholarships

B.mackReiterwantedtohelphisfamilygooutofthetrouble

C.traditionalscholarshipsareagoodsolutiontothetuitionproblemsinsomefamilies

D.mackReiterwasveryproudofhisnationalwrestlingchampionship

28.

Thelanguageofthepassageismostly______.

A.descriptiveB.narrativeC.expositiveD.critic

29.(72)

30.

Thevalueofcompetitionworksagainstthespiritofnationalcooperationinthat______.

A.itmakespeoplenotbelieveinthegovernment

B.itcausespeopletosuspectbutnottotrusteachother

C.itmakespeopleevenunabletocooperatewellonlocallevels

D.itencouragespeopletogainsuccessthroughindividualhardwork

31.(70)

32.

Accordingtothispassage,whatisthemostexpensiveresourceinacorporation?

A.Product.

B.Humanresource.

C.Rawmaterials.

D.Clientsofthecorporation.

33.Themanbehindthisnotion,JackMaple,isadandywhoaffectsdarkglasses,homburgs(翹邊帽)andtwo-toeshoes;yethehasbecomesomethingofalegendinAmerica'spolicedepartments.Forsomeyears,startinginNewYorkandmovingontohigh-crimespotssuchasNewOrleansandPhiladelphia,heandhisbusinesspartner,JohnLinderhavemarketedatwo-tiersystemforcuttingcrime.

First,policedepartmentshavetosortthemselvesout:rootoutcorruption,streamlinetheirbureaucracy,andmakemorecontactwiththepublic.Second,theyhavetoadoptacomputersystemcalledComstatwhichhelpsthemtoanalyzestatisticsofallmajorcrimes.Theseareconstantlykeyedintothecomputer,whichthendisplayswhereandwhentheyhaveoccurredonacolor-codedmap,enablingthepolicetomonitorcrimetrendsastheyhappenandtospothigh-crimeareas.InNewYork,Comstat'sstatisticalmapsareanalyzedeachweekatameetingofthecity'spolicechiefandprecinctcaptains.

MessrsMapleandLinder("specialistsincrime-reductionservices")havenodoubtthattheirsystemisamaincontributortothedropincrime.WhentheyintroduceditinNewOrleansinJanuary1997,violentcrimedroppedby22%inayear;whentheymerelystartedworkinginformallywiththepolicedepartmentinNewark,NewJersey,violentcrimefellby13%.Policedepartmentsarenowlininguptopayasmuchas$50,000amonthforthesetwomentoputthemstraight.

Probablyallthesenewpoliciesandbitsoftechnicalwizardry,addedtogether,havemadeabigdifferencetocrime.Butthereremainanomaliesthatcannotbeexplained,suchasthefactthatcrimeinWashingtonD.C.,hasfallenasfastasanywhere,althoughthepolicedepartmenthasbeencorruptandhopelessand,inlargestretchesofthecity,neitherpolicenorresidentsseemdisposedtofightthecriminalsintheirmidst.

Themoreimportantreasonforthefallincrimerates,manysay,isamuchlesssophisticatedone.Itisafactthatcrimerateshavedroppedastheimprisonmentratesoared.In1997thenationalincarcerationrate,at645per100000peoplewasmorethandoubletheratein1985,andthenumberofinmatesincityandcountyjailsroseby9.4%.almostdoubleitsannualaverageincreasesince1990.Surelysomecriminologistsargue,onesetoffiguresisthecauseoftheother.Itisprecisebecausemorepeoplearebeingsenttoprison,theyclaimthatcrimeratesarefalling.A1993studybytheNationalAcademyofSciencesactuallyconcludedthatthetriplingoftheprisonpopulationbetween1975and1989hadloweredviolentcrimeby10-15%.

Yetcauseandeffectmaynotbesoobviouslylinked.Tobeginwith,thesaleandpossessionofdrugsarenotcountedbytheFBIinitscrimeindex,whichislimitedtoviolentcrimesandcrimesagainstproperty.Yetdrugoffencesaccountformorethanathirdoftherecentincreaseinthenumberofthosejailed;since1980,theincarcerationratefordrugarrestshasincreasedby1000%.Andalthoughaboutthree-quartersofthosegoingtoprisonfordrugoffenceshavecommittedothercrimesaswell,thereisnotyetacrystal-clearconnectionbetweenfillingthejailswithdrug-pushersandadeclineintherateofviolentcrime.Again,thoughnationalfiguresaresuggestive,localonesdiverge:theplaceswherecrimehasdroppedmostsharply(suchasNewYorkCity)arenotalwaystheplaceswhereincarcerationhasrisenfastest.

JackMaplestartedhiscareerin______.

A.PhiladelphiaB.OregonC.NewOrleansD.NewYork

34.

Whichofthefollowingstatementsistrue?

A.Americans'caloricintakehasdroppedoverthelastfewdecades.

B.Manypeoplewhotrytoloseweightgiveuphalfway.

C.Americansarealwaysawareofhowmuchtheyeat.

D.Obesitydoesnoharmtopeople'shealth.

35.(68)

36.

Thearrivaloftheindustrialageinourhistoricalevolutionmeantthat______.

A.universalemploymentvirtuallyguaranteedprosperity

B.economicfreedomcamewithineveryone'scontrol

C.patternsofworkwerefundamentallychanged

D.people'sattitudestoworkhadtobereversed

37.(69)

38.(76)

39.PartB

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

AccordingtotheAmericanAcademyofDermatology,anestimated10to50millionpeopleinthiscountryhaveanallergicreactiontopoisonivyeachyear.Poisonivyisoftenverydifficulttospot.Itcloselyresemblesseveralothercommongardenplants,andcanalsoblendinwithotherplantsandweeds.Butifyoucomeintocontactwithit,you'11soonknowbytheitchy,blisteryrashthatformsonyourskin.Poisonivyisared,itchyrashcausedbytheplantthatbearsitsname.Manypeoplegetitwhentheyarehikingorworkingintheirgardenandaccidentallycomeintodirectcontactwiththeplant'sleaves,roots,orstems.Thepoisonivyrashoftenlookslikeredlines,andsometimesitformsblisters.

66.______

About85percentofpeopleareallergictotheurushiolinpoisonivy,accordingtotheAmericanAcademyofDermatology.Onlyatinyamountofthischemical—1billionthofagram—isenoughtocausearashinmanypeople.Somepeoplemayboastthatthey'vebeenexposedtopoisonivymanytimesandhavenevergottentherash,butthatdoesn'tnecessarilymeanthey'renotallergic.Sometimestheallergydoesn'temergeuntilyou'vebeenexposedseveraltimes,andsomepeopledeveloparashaftertheirveryfirstexposure.Itmaytakeuptotendaysfortherashtoemergethefirsttime.

67.______

Herearesomeotherwaystoidentifythepoisonivyplant.Itgenerallygrowsinaclusteroflow,weed-likeplantsorawoodyvinewhichcanclimbtreesorfences.Itismostoftenfoundinmoistareas,suchasriverbanks,woods,andpastures.Theedgesoftheleavesaregenerallysmoothorhavetiny"teeth".Theircolorchangesbasedontheseason—reddishinthespring;greeninthesummer;andyellow,orange,orredinthefall.Itsberriesaretypicallywhite.

68.______

Thebody'simmunesystemisnormallyinthebusinessofprotectingusfrombacteria,viruses,andtheirforeigninvadersthatcanmakeussick.Butwhenurushiolfromthepoisonivyplanttouchestheskin,itinstigatesanimmuneresponse,calleddermatitis,towhatwouldotherwisebeaharmlesssubstance.Hayfeverisanotherexampleofthistypeofresponse;inthecaseofhayfever,theimmunesystemoverreactstopollen,oranotherplant-producedsubstance.

69.______

Theallergicreactiontopoisonivyisknownasdelayedhypersensitivity.Unlikeimmediatehypersensitivity,whichcausesanallergicreactionwithinminutesofexposuretoanantigen,delayedhypersensitivityreactionsdon'temergeforseveralhoursorevendaysaftertheexposure.

70.______

Intheplaceswhereyourskinhascomeintocontactwithpoisonivyleavesorurushiol,withinonetotwodaysyou'lldeveloparash,whichwillusuallyitchrredden,burn,swell,andform.blisters.Therashshouldgoawaywithinaweek,butitcanlastlonger.Theseverityofthereactionoftenhastodowithhowmuchurushiolyou'vetouched.Therashmayappearsoonerinsomepartsofthebodythaninothers,butitdoesn'tspread—theurushiolsimplyabsorbsintotheskinatdifferentratesindifferentpartsofthebody.Thickerskinsuchastheskinontheonsolesofyourfeet,ishardertopenetratethanthinnerskinonyourarmsandlegs.

A.Becauseurushiolisfoundinallpartsofthepoisonivyplant—theleaves,stems,androots—it'sbesttoa-voidtheplantentirelytopreventarash.Thetroubleis,poisonivygrowsalmosteverywhereintheUnitedStates(withtheexceptionoftheSouthwest,Alaska,andHawaii),sogeographywon'thelpyou.Thegeneralruletoidentifypoisonivy,"leafletsthree,

40.At18,AshanthiDeSilvaofsuburbanClevelandisalivingsymbolofoneofthegreatintellectualachievementsofthe20thcentury.Bornwithanextremelyrareandusuallyfataldisorderthatleftherwithoutafunctioningimmunesystem(the"bubble-boydisease",namedafteranearliervictimwhowaskeptaliveforyearsinasterileplastictent),shewastreatedbeginningin1990witharevolutionarynewtherapythatsoughttocorrectthedefectatitsverysource,inthegenesofherwhitebloodcells.Itworked.Althoughherlastgene-therapytreatmentwasin1992,sheiscompletelyhealthywithnormalimmunefunction,accordin