2022-2023年湖南省益陽市公共英語五級(筆試)

2022-2023年湖南省益陽市公共英語五級(筆試)學(xué)校:________班級:________姓名:________考號:________

一、1.ListeningComprehension(15題)1.PartB

Directions:Youwillhear3conversationsortalksandyoumustanswerthequestionsbychoosingA,B,CorD.YouwillheartherecordingONLYONCE.

聽力原文：Asyouallknow,logstructuresaregainingpopularity.Theyarenolongerjustthesimplecountryhomeswhichwethinkofasthetraditionallogcabin.Someupscalehomesnowincorporatenaturalroundlogsinsealingbeamsandwalls.Peopleseemtothinkthattheroundedlogsgivetheirhomesacozywarmatmosphere.Andevenpeoplewhowanttobuildatraditionallogcabinontheirowncanbuyakitwithprecutlogsthatfittogetherlikepiecesofjigsawpuzzle.Beforeshowingyousomeslidesofmodernloghouses,I'dliketointroducealittlehistoricalbackgroundonthesubject.

Logcabinswerefirstbuiltinthelate1600salongtheDelawareRiverValley.TheEuropeanimmigrantswhosettledtherebroughtcenturiesofoldtraditionsofworkingwithlogs.Andinthisheavilywoodedarealogswerethematerialinhand.Logcabinswerethemostpopularintheearly1800swiththesettlerswhoweremovingwest.Theyprovidedtheanswertothepioneer'sneedforasafeandsturdyhomethatanordinaryfamilycouldbuildquickly.Theyhaddirtfloorsandslidingboardsforwindows.ButthelogbuildingsthathaveprobablyhadmostinfluenceonmodemarchitectsarethoseofthemountainretreatsofwealthyNewYorkers.Thesecountryhouseswhichwerepopularintheearly1900stypifywhat'sknownastheAdoroundyxstyle.Nowlet'slookatthoseslides.

Whatisthespeakermainlydiscussing?

A.TraditionalEuropeanarchitecture.

B.Techniquesforbuildinglogcabins.

C.Thehistoryoflogstructures.

D.Howtobuildahomeyourself.

2.Accordingtothetalk,onlyrealcharactersportrayedinbooksmaybecomeourfriends.

A.RightB.Wrong

3.HowlongdidthejourneytakefromEnglandtoIndiaintheolddays?

4.Accordingtothespeaker,whydopesticidesposeathreattoamphibians?

A.Pesticidescancauseanamphibian'sskintodryout.

B.Pesticideskilltheinsectsthatamphibiansdependonforfood.

C.Dissolvedpesticidescaneasilyenteramphibian'sbodies.

D.Amphibiansmayeatplantsthathavebeentreatedwithpesticides.

5.Inwhichrespectdoesthestudents'organizationsseemtobeeffective?

A.Dealingwithacademicaffairsoftheuniversity.

B.Ensuringthatthestudentsobserveuniversityregulations.

C.Evaluatingstudents'performanceintheirstudy.

D.Keepingupthestudents'enthusiasmforsocialactivities.

6.Howlongdidittakeforchilipeppertobecomepopulararoundtheworld?

7.Howmanyreactionscouldyouhavetowardstheteacher'sreport?

8.Strokesmaysometimesdestroyallofthemirrorimage.

A.TrueB.Fasle

9.MostpeopleinthemountainsofEduadordrinkalotofcoffeeandalcohol,buttheystilllivelong.

A.TrueB.Fasle

10.Wanghaslittleknowledgeofthephoneticprocessingsystem.

A.TrueB.Fasle

11.Dr．MannisnowinCambridge，writingabookonthe______．

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.PartC

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

Younowhave1minutetoreadQuestions21-30.

聽力原文：Imagineyouareahighschoolprincipal.Ateacherburstsbreathlesslyin-toyouroffice."There'safistfightinthedining-room,"shegasps.Theresponsibilityisyourstostopthefight.Howdoyoumeetit?

(1)Perhapsyou,asayoungster,tookpartinfightsandyourpresent-daytieswithstudentsarewarmandstrong.Youcanstopthefightbecauseyourprestigeishighamongthem.

(2)Youhaveaplanprepared.Otherschoolshavebeendisruptedsoyouhavealreadyplannedawaytostopanyfight.

(3)Youaretotallyconfidentofyourabilityinacrisis.Youarereadytostrideintothelunchroomandtakechargewithoutasinglequalm.Stoppingthefightwillbeeasy.

(4)Youferventlywishthatyoucoulddelegatethejobsinceyouknowthatyou'renotatalentedpeacemaker.Youwishyoucouldreturntothejobofplanningfortheschool'sneedtenyearshence.

Oneofthesefourreactionswouldbethefirstyou'dfeel,butonlyone—nottwoorthreeofthem,saythreepsychologists.Thesepsychologists—Dr.HarrietMann,Dr.HumphreyOsmondandMiriamSiegler—havecomeupwithaschemeforsortingpeopleregardlessoftheireducation,ageorsituation.

Theconceptisbasedonthepremisethatallpeoplehaveabasicwayofseeingtime.Eachofusispredisposedtoseealleventsfromtimevantagepoint.Eitheritremindsyouofthepast(past-oriented),howtheeventfitsintotoday,yesterday,andtomorrow(timeline),whatitistoday(present),orhowitwilldevelop(future).

Thethreebeganworkingin1968whenDr.MannandMrs.SieglerwereassistantstoDr.Osmond,director,attheBureauofResearch,NewJerseyNeuro-PsychiatricInstituteinPrinceton.Dr.OsmondiscurrentlydevisingwaystomakeempiricalstudiesofthetheoryandDr.MannisinCambridge,Massachusetts,writingabookontheWorldsofTime.Theirtake-offpointwasaninterestinobservationsmadebySwisspsychologistCarlGustavJung,whodescribedinthe1920sthetemperamentaldifferencesoffourpsychologicaltypes.Jungisknownasthefounderofanalyticpsychology.SinceJung'sworkin1921.however,noonehadconceivedofatheoreticalframeworkthatwouldaccountforthefourtypes.Withoutsuchaframework,therewasnopossibilityofsubstantiatingthatpeopleofdifferenttypesexperiencetheworldverydifferently.

Timeandspacearethetouchstonesinthesystem.Eachperson,afterall,useshistimesomehowandexistswithinandactsuponthespacearoundhim.Dr.Mann,andcompanyproposethatcertaintraitsaresharedbypersonsfallingineachofthefourcategories.

Thefirsttype,thepasttype,seestimeasbeingcircular.Forhim,thepastcropsupinthepresentandthenreturnstothepastasamemory.Heenjoyscollectingsouvenirsandkeepingdiaries.HetellsstoriesaboutGreatAuntHattieandalwaysremembersyourbirthday.

Pasttypesarepeggedbythissystemasemotionalpeoplewhoseetheworldinahighlysubjectiveway.Forinstance,SchoolPrincipalI(pasttype)couldidentifywiththefightandknowhowtohandleitbecauseofsomepastexperience—whetheritbesimilarfightsasachildhimselforonespreviouslydealtwithastheschoolprincipal.Inaddition,pasttypesusuallyfollowstrictmoralcodesandoftenarevaluedmoreforwhattheyarethanforwhattheydo.Thisqualityitself—becauseitlendsauthoritarianstrengthtoonewhopossessesit—mightcausethestudentstoquitfighting.Pasttypesoftenhavebeenfoundtobeskillfulatassessingtheexactemotionaltenorofaneventan

14.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

15.Meatsalsocontainwater.

A.RightB.Wrong

二、2.UseofEnglish(10題)16.

【C5】

17.(44)

18.

【C20】

19.(40)

20.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)

21.

【C4】

22.

【C13】

23."Themoregadgetsthereare,the【C1】______thingsseemtoget."saidHonoreErvin,co-authorofTheEtiquetteGirls:ThingsYouNeedtoBeTold."Justbecauseit'sthere【C2】______yourdisposal,doesn’tmeanyouhavetouseit24/7."

Arecent【C3】______bymarketresearchcompanySynovateshowedthat70percentof1,000respondents【C4】______thepoorestetiquetteincellphoneusersoverotherdevices.Theworsthabit?Loudphoneconversationsinpublicplaces,or"cellyell,"【C5】______to72percentoftheAmericanspolled.

"Peopleuse【C6】______anywhereandeverywhere,"Ervinsaid."Atthemovies-turn【C7】______yourcellphone.Idon'twanttopay$10tobesittingnexttosomeguychitchattingtohisgirlfriend【C8】______hiscellphone."Thisrudenesshasdeterioratedpublicspaces,accordingtoLewFriedland,acommunicationprofessor【C9】______theUniversityofWisconsin-Madison.He【C10】______thelackofmannersakindofunconsciousrudeness,【C11】______manypeoplearenot【C12】______ofwhatthey'redoingortheothersaroundthem.

"Ithinkit'sreallynoticeableinanyplane,trainorbus【C13】______you'resubjectedagainstyourwill【C14】______someoneelse'sconversation,"hesaid."Youcanlistentointimatedetailsoftheiruncle'sillness,problemswiththeirloversand【C15】______they'rehavingforsinner.""It【C16】______what.wasapublic"commonspaceandstartsto【C17】______itupintosmallprivatespace."

Ashorttimeago,ifcellphoneusers【C18】______politelyaskedtotalkquietly,theywould【C19】______withchagrin,hesaid."Nowmoreandmorepeopleareessentiallytreatingyoulikeyoudon'tunderstandthatloudcellphoneuseis【C20】______inpublic."

【C1】

24.(41)

25.

【C7】

三、3.ReadingComprehension(15題)26.(78)

27.

Whydoestheauthormentiongeneticengineeringandcomputerscience?

A.Tocomparethemwiththenewmaterials.

B.Toshowthesignificanceofthenewmaterialsonthefutureworld.

C.Tocomparethenewmaterialswiththem.

D.Toexplainhispoint.

28.

Thevalueofcompetitionworksagainstthespiritofnationalcooperationinthat______.

A.itmakespeoplenotbelieveinthegovernment

B.itcausespeopletosuspectbutnottotrusteachother

C.itmakespeopleevenunabletocooperatewellonlocallevels

D.itencouragespeopletogainsuccessthroughindividualhardwork

29.(68)

30.(67)

31.PartA

Directions:ReadthefollowingtextsandanswerthequestionswhichaccompanythembychoosingA,B,CorD.MarkyouranswersonANSWERSHEET1.

Notlongago,amysteriousChristmascarddroppedthroughourmailslot.TheenvelopewasaddressedtoamannamedRaoul,who,Iwasrelativelycertain,didnotlivewithus.Theenvelopewasn'tsealed,soIopenedit.Theinsideofthecardwasblank.Ed,myhusband,explainedthatthecardwasbothfromandtothenewspaperdeliveryman.HisnamewasapparentlyRaoul,andRaoulwantedaholidaytip.Weweremeanttoputacheckinsidethecardandthendroptheenvelopeinthemail.Whenyourservicesarerenderedat4a.m.,youcan'tsimplyhangaround,likeahotelbellboyexpectingatip.Youhavetobedirect.

SoIwroteaniceholidaygreetingtothismanwho,inmyimagination,firesTheNewYorkTimesfromhishikeaimedatourfrontdoor,causingmorenoisewithmerenewsprintthanmostpeoplemanagewithsophisticatedblackmarketfireworks.

Withastart,Irealizedthatperhapsthereasonforthe4a.m.—wake-upnoisewasnotordinaryrudenessbutcarefullyexecutedspite:IhadnottippedRaoulinChristmasespast.Ihonestlyhadn'trealizedIwassupposedto.Thiswasthefirsttimehe'dusedthecardtactic.SoIgotoutmycheckbook.Somewherealongtheline,holidaytippingwentfromanoptionalthank-youforayearofservicestoaMtectionracket(收取保護費的黑社會組織)

Severaldayslater,IwasbringingourgarbagebinsbackfromthecurbwhenInoticedanenvelopetapedtooneofthelids.TheoutsideoftheenvelopesaidMICKEY.Ithadtobeanothertiprequest,thistimefromourgarbagecollector.UnlikeRaoul,Mickeyhadn'tenclosedhisownChristmascardfromme.Inaway,Iappreciatedthedirectness."Iknowyoudon'tcarehowmerrymyChristmasis,andthat'sfine,"thegesturesaid."Iwant$30,orI'll'forget'toemptyyourgarbagebinsomehotsummerday."

Iputacheckintheenvelopeandtapeditbacktothebin.Thenextmorning,Ednoticedthattheenvelopewasgone,thoughthetrashhadn'tyetbeenpickedup:"SomeonestoleMickey'stip!"Edwasquitecertain.Hemademecallthebankandcancelthecheck.

ButEdhadbeenwrong.Twoweekslater,Mickeyleftaletterfromthebankonoursteps.TheletterinformedMickeythatthecheck,whichhehadtriedtocash,hadbeencancelled.ThefollowingTuesdaymorning,whenEdsawatruckoutside,heranoutwithhiswallet."AreyouMickey?"

Themanlookedathimwithscorn."Mickeyisthegarbageman.Iamtherecycling."NotonlyhadEdinsultedthismanbyhintingthathewasagarbageman,buthehadobviouslyneglectedtotiphim.Edranbackinsideformorefunds.Thenhenoticedthatthedriverofthetruckhadbeenwatchingthewholetransaction.Hepeeledoffanothertwentyandlookedaround,wavingbillsintheair."Anyoneelse?"

HadweconsultedthewebsiteoftheEmilyPostInstitute,thisembarrassingbreachofetiquette(禮節(jié))couldhavebeenavoided.Under"trash/recyclingcollectors"intheinstitute'sHolidayTippingGuidelines,itsays,"$10to$30each."Youmayormaynotwishtoknowthatyourpetgroomer,hairdresser,mailmanandUPSguyallexpectaholidaytip.

Thenewspaperdeliverymanputablankcardinsidetheenvelopebecause______.

A.heforgottowriteafewwordsonit

B.hewantedthecoupletosenditback

C.heusedittoaskforaChristmastip

D.hewasafraidofaskingforatipinperson

32.PartA

Directions:ReadthefollowingtextsandanswerthequestionswhichaccompanythembychoosingA,B,CorD.MarkyouranswersonANSWERSHEET1.

TheStoneage,theIronage.Entireepochshavebeennamedformaterials.Sowhattonamethedecadesahead?Thechoicewillbetough.Welcometotheageofsuperstuff.Materialscience--oncetheleastsexytechnology—isburstingwithnew,practicaldiscoveriesledbysuperconductingceramicsthatmayrevolutionizeelectronics.Butsuperconductorsarejustpartofthepicture:fromhousesandcarstocookpotsandartificialteeth,theworldwillsometimebemadeofdifferentstuff.Exoticplastics,glassandceramicswillshapethefuturejustassurelyashavegeneticengineeringandcomputerscience.

Thekeytothenewmaterialsisresearchers'increasingabilitytomanipulatesubstancesatthemolecularlevel.Ceramics,forinstance,havelongbeenlimitedbytheirbrittleness.Butbyminimizingthemicroscopicimperfectionsthatcauseit,scientistsaremakingfarstrongerceramicsthatstillretainsuchqualifiesashardnessandheatresistance.FordMotorCo.nowusesceramictoolstocutsteel.AfirmcalledKyocerahascreatedalineofceramicscissorsandknivesthatstaysharpforyearsandneverrustorcorrode.

Asimilartransformationhasovertakenplastics.High-strengthpolymersnowform.bridges,iceskatingrinksandhelicopterrotors.Andonenewplasticthatgenerateselectricitywhenvibratedorpushedisusedinelectricguitars,touchsensorsforrobothandsandkaratejacketsthatautomaticallyrecordeachpunchandchop.Evenplasticlitter,whichoncethreatenedtopermanentlyblotthelandscape,hasprovedamenabletomoleculartinkering.Severalmanufacturersnowmakebiodegradableforms;someplasticsix-packringsforexample,graduallydecomposewhenexposedtosunlight.Researchersaredevelopingwaystomakeplasticsasrecyclableasmetalorglass.What'smore,composites—plasticreinforcedwithfibresofgraphiteorothercompounds--madetheround-the-worldflightofthevoyagerpossibleandhaveevenbeenprovedincombat:ahelmetsavedaninfantryman'slifebydeflectingtwobulletsintheGrenadainvasion.

Someadvancedmaterialsareoldstandardwithanewtwist.Thenewestfiberopticcablesthatcarrytelephonecallscross-countryaremadeofglasssotransparentthatapieceof100milesthickisclearerthanastandardwindowpane.

Butnewmaterialshavenoimpactuntiltheyaremadeintoproducts.Andthattransitioncouldprovedifficult,forswitchingrequireslengthyresearchandinvestment.Itcanbesaidafirmerhandleonhowtomovetocommercializationwilldeterminethesuccessorfailureofacountryinthecomingfuture.

Howmanynewmaterialsarementionedinthispassage?

A.Two.B.Three.C.Four.D.Five.

33.PartB

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

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

66.______

About85percentofpeopleareallergictotheurushiolinpoisonivy,accordingtotheAmericanAcademyofDermatology.Onlyatinyamountofthischemical—1billionthofagram—isenoughtocausearashinmanypeople.Somepeoplemayboastthatthey'vebeenexposedtopoisonivymanytimesandhavenevergottentherash,butthatdoesn'tnecessarilymeanthey'renotallergic.Sometimestheallergydoesn'temergeuntilyou'vebeenex-posedseveraltimes,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,whichwillusuallyitch,redden,bum,swell,andform.blisters.Therashshouldgoawaywithinaweek,butitcanlastlonger.Theseverityofthereactionoftenhastodowithhowmuchurushiolyou'vetouched.Therashmayappearsoonerinsomepartsofthebodythaninothers,butitdoesn'tspread—theurushiolsimplyabsorbsintotheskinatdifferentratesindifferentpartsofthebody.Thickerskinsuchastheskinontheonsolesofyourfeet,ishardertopenetratethanthinnerskinonyourarmsandlegs.

A.Becauseurushiolisfoundinallpartsofthepoisonivyplant—theleaves,stems,androots—it'sbesttoa-voidtheplantentirelytopreventarash.