湖北省实验中学2023-2024学年高三3月份模拟考试英语试题含解析

湖北省实验中学2023-2024学年高三3月份模拟考试英语试题注意事项：1．答卷前，考生务必将自己的姓名、准考证号填写在答题卡上。2．回答选择题时，选出每小题答案后，用铅笔把答题卡上对应题目的答案标号涂黑，如需改动，用橡皮擦干净后，再选涂其它答案标号。回答非选择题时，将答案写在答题卡上，写在本试卷上无效。3．考试结束后，将本试卷和答题卡一并交回。第一部分（共20小题，每小题1.5分，满分30分）1．---Thepricesofvegetablesaregoingupmadly.It’sreallytoomuchforus.---Butforthesituationwheremanyvegetableproducingareas_____constantlowtemperature,thingswouldnotbelikethis.A．meetwith B．havemetwithC．metwith D．hadmetwith2．Howlongdoyousupposeitis________________hearrivedandbegantoworkthere？A．when B．beforeC．after D．since3．Manywritersaredrawntobuildingaworld,_____readersaresomewhatfamiliarwithbutalsofeeldistantfromournormallives.A．it B．one C．that D．theone4．—________It’sonlyaninterview!—Onlyaninterview?Onlyaninterview?WhatifIpanic?WhatifIsayasillywordbyaccident?A．Welldone!B．Comeon!C．Howcome?D．Nodoubt!5．Thedesksinourclassroomaresoclosetogetherthatthereisnotenoughroomtomovethem．A．between B．in C．across D．over6．________workandcreativeactivitieshavebeenimportantdriversofhumanprogressisdeeplyrootedinoursocialvalues.A．HowB．WhetherC．ThatD．Why7．henewly-discoveredstarwasnamed_____aChineseastronomer________hiscontributionstoastronomy.A．for;infavorof B．after;inhonorofC．by;inmemoryof D．as;inpraiseof8．Wedidhaveaquarrelaboutmoneylastnight，butnowwehavealready_____________.A．takenup B．putupC．madeup D．broughtup9．ProfessorLi________forhisinformativelecture,waswarmlyreceivedbythestudents.A．knownB．knowingC．havingknownD．tobeknown10．TheBrownsheld_______theycalled“familyday”onceeachyear.A．that B．what C．which D．when11．—________?Youlookreallydown.—I’mtiredofmyjob.Thereareendlessproblemstodealwith.A．Whybother B．SowhatC．What’sup D．Whynot12．Iwasgoingtopaybycashwhenitsuddenlyoccurredtome_________Ihadleftmypurseathome.A．whether B．whatC．that D．where13．Itwasreportedthatasmanyas50%ofpatientsdonottakemedicine______directed,______hasdrawndoctor’sattention.A．when;it B．as;what C．as;which D．that;and14．StarskaterWuDajingwonChina’sfirstgoldmedalatthe2018PyeongChangOlympicWinterGamesbreakingworldrecordinshorttrackmen’s500m.A．toB．byC．withD．in15．Notuntilthebusdisappearedinthedistance________herschoolbagwasgone.A．Tinahadfound B．hadTinafoundC．didTinafind D．Tinafound16．---Thankyouforremindingmeofthetime,orIlatefortheflightyesterday.---Don’tmentionit.A．willhavebeen B．wouldhavebeenC．mustbe D．couldbe17．—You’vemadegreatprogressinyourEnglishstudy,haven’tyou?—Yes,butmuch.A．remainstodo B．isremainedtodoC．remainstobedone D．isremainedtobedone18．Allthestudentsarerequiredtochecktheyhavemadesomespellingerrorsintheircompositions.A．whetherB．whatC．thatD．which19．Tomissocreativeapersonthathealwayshaslotsof_________ideasinhismind,andsometimeswedon’tevenknowwhatheisthinkingabout.A．meanB．novelC．slimD．instant20．_____howtogetalongwithothersisveryimportantinsuccess.A．KnowB．KnownC．HavingknownD．Knowing第二部分阅读理解（满分40分）阅读下列短文，从每题所给的A、B、C、D四个选项中，选出最佳选项。21．（6分）Whenyou’relookingforwardtotakingaholidayinEgypt,you’recertainlynotshortofchoices.Thecountryhassomanytoseethatyou’llprobablynotwanttolimityourselftojustonecity.Hurghada—AWaterSportParadiseWith250hotelsrankingfromcomfortable3-starhotelsupto5-staraccommodation,themainattractionofstayinghereistheactivitiesinandonthewarmwaters.Ithasbecomeaninternationalcenterforwatersports,allowingvisitorstotakepartinsurfing,sailinganddeep-seafishing.Thewatersarealsohometoahugevarietyofcoralandfish,makingitadreamspotfordiving.Ifallthatisn’tenough,Hurghadaishometosomeoftheworld’sfinestunderwatergardens.Luxor—AnOpen-airMuseumofAncientHistoryForthosewithaninterestinEgyptianhistory,LuxorisanexcellentplacetostayandisbuiltuponthesiteoftheancientEgyptiancityofThebes.IfyoumakethisthebaseforyourEgyptholiday,you’rebasicallystayinginanopen-airmuseum!ThemoderncityofLuxorhastheruinsofKarnak.AcrosstheNileliemanymoremonuments,templesandtombsincludingtheValleyofKingsandtheQueens.TheNilesailingisnecessaryforthosewithaninterestinthecountry’sancienthistory.Cairo—TheCapitalCityFinally,ofcourse,there’sCairo.It’sdefinitelyastartingpointformostofEgyptholidaymakers.Cairooffersanexcellentmixofculture,art,cookingandsightseeingchances.Withthefamouspyramids,varioustemplesandsomefascinatingmuseum,Cairoisafantasticchoiceifyoucancometothecity.1、VisitorsfloodtoHurghadamainlybecauseitcanofferthem____________.A．thefunniestbotanicgardens B．choicesofwateractivitiesC．abriefhistoryofEgypt D．themixofcultureandart2、WhichofthefollowingcitiesdomosttouristsvisitfirstinEgypt?A．Cairo B．Luror C．Thebes D．Hurghada3、Thispassageismostprobablytakenfrom____________.A．ahistoricaldocument B．asciencemagazineC．atravelguide D．abookreview22．（8分）Adragonflybarelyaninchandahalflongappearstobeanimalworld’smostproductivelongdistancetraveler-flyingthousandsofmilesoveroceansasitmigratesfromcontinenttocontinent-accordingtoanewlypublishedresearch.Biologistswholedthestudysaytheevidenceisinthegenes.Theyfoundthatpopulationsofthisdragonfly,calledPantalaflavescens,inTexas,easternCanada,Japan,Korea,India,andSouthAmerica,havegenessosimilarthatthereisonlyonelikelyexplanation.Apparently—somehow—theseinsectsaretravelingdistancesthatareextraordinarilylongfortheirsmallsize,breeding(繁殖)witheachother,andcreatingacommonworldwidegenepool.Buthowdoinsectsfromdifferentcontinentsmanagetomeetandhookup?Waresaysitappearstobethewaytheirbodieshaveevolved.“Thesedragonflieshaveadaptationssuchasincreasedsurfaceareasontheirwingsthatenablethemtousethewindtocarrythem.”Dragonflies,infact,havealreadybeenobservedcrossingtheIndianOceanfromAsiatoAfrica.“Theyarefollowingtheweather,”saysDanielTroast,whoanalyzedtheDNAsamplesinWare’slab.“They’regoingfromIndiawhereit’sdryseasontoAfricawhereit’swetseason,andapparentlytheydoitonceayear.”WetnessisamustforPantalatoreproduce,andthat,saysWare,iswhytheseinsectswouldbedriventoevenattemptsuchadangeroustrip,whichshecallsa“kindofsuicide.”Thespeciesdependsonit.Whilemanywilldieontheroute,aslongasenoughmakeit,thespeciessurvives.Forthemoment,thedetailsofthisextraordinaryinsecttravelareaneducatedbestguess.Muchmoreworkisneededtobringmanylooseendstogether.WareandTroasthopethatscientistscanworkonplottingthoseroutes.1、WhatprovesPantalaflavescensaretheworld’slongest-distanceflyers?A．Scientistshavetrackedthedragonflyacrosstheworld.B．TherearemanyPantalaflavescensinvariouscontinents.C．ThesamedragonflywasfoundbothinAsiaandAmerica.D．Pantalaflavescensindifferentcontinentshavesimilargenes.2、WhathelpsPantalaflavescensflyoversolongdistance?A．Theirspecialbodyshape.B．Theirabilitytousewind.C．Theirsmallandlightbody.D．Theirlargeandstrongwings.3、WhatisnecessaryforPantalaflavescenstoreproduce?A．Dampweather.B．Enoughsunshine.C．Dryenvironment.D．Warmnests.4、Whatdoestheunderlinedword“it”inParagraph5referto?A．Theweather.B．Theinsect.C．Thewind.D．Thetrip.23．（8分）Evenforafirst-timevisitortoChina,itisimpossibletoignorethepopularityofQuick-Response(QR)codes.Thesesquare-shapedblack-and-whitesymbolsinWeChatorAlipaywhereQRcodesarescannedtoaddnewfriendsormakepayments.TheQRCodesystemoriginatedinJapan.TheengineerMasahiroHarafeltthelimitationoftheone-dimensionbarcodeinuseandthusdevelopedtheQRcodeswhichcouldcarrydatahorizontallyandvertically.QRcodescouldholdmuchmoreinformationthanbarcodeduetotheirextradimension.Inaddition,QRcodeshavelargerdatacapacity,smallerprint—outsizeandhigherresistancetodirtanddamage,whichmakethemwidelyappliedinmanyotherapplications.ThoughthetechnologyofQRcodesiscomplicated,wecaneasilycreateourownQRcodeswiththehelpofQRcodegenerators,manyofwhichareavailableonlineforfree.UserscouldenterthedatatheywishtheQRcodetodisplay,andthegeneratorturnsitintoasymbolthatcanbeprintedordisplayedinelectronicform.TheprocessofcreatingQRcodescouldbereallyfunwhenwecustomisethedesignofthecodesaccordingtoourspecificneeds.Forinstance,wecanadjustthecolor,addalogo,andcreatesocialoptionsetc.Moreover,dynamic(动态的)QRcodesarealsoavailable.TheyaremorevariousthanstandardQRcodesbecausetheyallowuserstoeditdataenteredpreviouslywhereasdatainstandardQRcodescannotbeeditedonceprinted.Plus,don’tlimityourQRcodetoonemobilescanner.Anyonecanscanyourcodewithanyreader.Alowerbarriertoentrymakessuccessmorelikelyforyouandtheuser.Meanwhile,wemustalsorecognizethevulnerabilityofQRcodes.Duetoitseasyaccess,criminalscanstealsimplybyreplacingtheQRcodeswiththeirown,routingcashintotheirownbankaccounts.Hence,weshouldallbecomemoreconscioustowardsvirtualmoneytransactionsthroughQRcodesandparticipateinadditionalsecuritymeasures.1、WhichofthefollowingisNOTafunctionofQRcodes?A．Datastorage.B．Scanningreader.C．Socialnetworking.D．Mobilepayment.2、Whyisbarcodementionedinparagraph2?A．Tointroducethemaintopic.B．Toshowtheauthor’sattitude.C．TohighlightthefeaturesofQRcodes.D．Toaddsomebackgroundknowledge.3、Whichofthefollowingbestexplains“vulnerability”underlinedinparagraph4?A．Threat. B．Weakness.C．Difficulty. D．Simplicity.4、WhichistrueaboutQRcodesaccordingtothetext?A．TheywerefirstusedinChina.B．Thegeneratorschargetheusersalot.C．DataeditingispossibleinprintedQRcodes.D．MorescanningdevicesareavailableinreadingQRcodes.24．（8分）AnautonomousvehicledesignedformakinglocalcommercedeliverieswasuncoveredbyNuro.ThevehicleisabouttheheightofanSWbutfarnarrowerthanatypicalcar.Theelectriccarfeaturesfouroutsidecompartments（暗格）—twooneachside-toholdseparatedeliveries.Eachcompartmentcanbetailoredtoaspecificuse,suchascookingapizzaorrefrigeratingapackage.“Wecanuseself-drivingtechnologytodeliveranything,anytime,anywhereforbasicallyalllocalgoodsandservices,”Nuroco-founderDaveFergusonsaid.“Consumersusedtobeokaywithtwo-weekpaidshipping.Itbecametwo-weekfreedelivery,followedbyoneweek,twodays,andthesameday.Nowsame-daydeliveryisn’tfastenoughforsomecustomers.”Nuroisn’taloneinbuildingrobotsforlocalcommercedeliveries.Earlierthismonth,Toyota,aJapanesecarcompany,uncoveredaconceptvehiclethatcouldbeusedforpackagedelivery.Ahandfulofstartups—includingStarshipTechnologies,MarbleandDispatch—aretestingsmallrobotsfordeliveriesonsidewalks.Nuro’svehiclewilllikelyfacelegalhurdles.Fullyautonomousvehicleswithoutatestdiveraren’tlegalinCaliforniatoday,andmanycompanieshaveshiftedtestingostateswhereregulatorsaremorewelcomingofautonomousvehicles,suchasArizona.Nuroexpectstofacefewerchallengesbecauseitdoesn’tcarrypassengers.Nuro’snarrowsizemayalsobehelpfulwhennavigatingstreetsandavoidingpedestrians.Thevehicleisn’tequippedwithanyspecialfeaturestocommunicatewithpedestriansorotherroadusers.Somecompanieshavetestedandpatentedsolutionssuchasdigitalscreensthatsignalthecar’snextmove.Fergusonsaidhisteamconductedstudiesandfoundthatsuchtechniquescouldconfusepeople.Nurobelievesit’sbettertomakesurethecarperformspredictably,sothathumandriversknowwhattoexpectfromit.“Wefeelbycreatingthisnewtechnologythat’sgoingtoenablethislastmiledelivery,we’regoingtobecreatingnewmarketsanddoingthingsthatpreviouslyweren’tpossible,”Fergusonsaid.“Thisisnotswappingoutjobswithrobots.It’screatingnewmarkets.Therewilldefinitelybenewemploymentopportunities.”1、WhatisthemaincharacteristicoftheNuro’sself-drivingvehicle?A．Itcancookdeliciousmealsforcustomers.B．Itisapioneerinthefieldofself-drivingvehicles.C．Itisfurnarrowerandhigherthanotherautonomousones.D．Itsdeliveriescanbetransportedinthespecialcompartment.2、Whichcanbestreplacetheunderlinedword“hurdles”inParagraph4?A．breakthrough.B．dilemma.C．restriction.D．protection.3、WhyistheNuro’svehiclenotequippedwithcommunicatingfeatures?A．Itsdigitalscreensoftenbreakdown.B．Peoplemaybepuzzledatthefeatures.C．Thefeatureshavenotbeendeveloped.D．Itsperformanceisusuallyhardtopredict.4、WhatcanweinferaboutFerguson’sopiniononthisnewtechnology?A．Beneficial.B．Challenging.C．Controversial.D．Ambiguous.25．（10分）Americanwomenwhoworkascomputerprogrammers,chefsanddentistsearn28percentlessthanmendoingthesamejobs.Thosearethejobswiththebiggestwagedifferencesbetweenmenandwomen,accordingtoanewstudy.Overall,thestudyfoundthatwomenearn5.4percentlessthanmenfordoingthesamejob,inthesamelocationandforthesameemployer.ThewagedifferencesbetweenwomenandmenweresimilarintheUnitedKingdom,Australia,GermanyandFrance.5.4percentisabigdifferenceinpaybetweenmenandwomenbecauseitcannotbeexplainedbywomenandmentakingthesamekindsofjobs.Itcanonlybeexplainedbybias(倔见)againstwomen,orothercauses,suchaswomennotbeinggoodataskingforpay.Researchsuggeststhatwomendonotnegotiate(交涉)aswellasmenwhenitcomestopay.Andwomenaregenerallymoreuncomfortableaskingfellowemployeeshowmuchtheymake,sotheycanseeiftheyarebeingpaidfairly.Accordingtothestudy,womenearnedatleast15percentlessthanmeninthesejobcategories:psychologists,pharmacists,physicians,opticians,pilotsandgameartists.Butinthefieldsofsocialwork,sellingmerchandise,researchassistantsandphysicianadvisors,womenearnmorethanmen.Insocialwork,womenearned7.8percentmorethanmen,thereportsaid.Thatwasthejobcategorywiththebiggestadvantageforwomen.Itwasstillfarlessthanthe28percentpayadvantageformeninsomefields.Comparingsalariesforfull-timeworkers,womenearnonly79percentasmuchasmen.Overalifetime,thatmuchofadifferenceinpaycanamounttoalargeamountofmoney.Womenonlyearned57percentasmuchasmenin1975.Itisnowupt079percent.Thatisprogress,thereportsays,butnotenough.1、Whichofthefollowinghasthebiggestpaydifferencesbetweenwomenandmen?A．Apilot.B．Agameartist.C．Aresearchassistant.D．Acomputerprogrammer.2、Whydowomenearnlessthanmenwhendoingthesamejob?A．Theydon’ttrytheirbesttofightforbetterpay.B．Theycarelessabouttheirpaythanmen.C．Bossesusuallylooksdownuponwomen.D．Theydon-tworkaseffectivelyasmen.3、Howmuchincomedofull-timewomenworkerslosecomparedwithmen?A．5.4%.B．7.8%.C．21%.D．28%.4、Whatdoesthereportthinkofthewomen'spay?A．Itisgrowingratherquickly.B．Itisrisingbutnotsatisfying.C．Itisnotfairforwomenworkers.D．Itisreasonableforpresentsituation.第三部分语言知识运用（共两节）第一节（每小题1.5分，满分30分）阅读下面短文，从短文后各题所给的A、B、C和D四个选项中，选出可以填入空白处的最佳选项．26．（30分）Intheclinic,IaskedifMichaelcouldberetested,sothespecialisttestedhimagain.Tomy___1___,itwasthesamescore.Laterthatevening,I___2___toldFrankwhatIhadlearnedthatday.Aftertalkingitover,weagreethatweknewour___3___muchbetterthananIQtest.We___4___thatMichael’sscoremusthavebeena___5___andweshouldtreathim___6___asusual.WemovedtoIndianain1962,andMichaelstudiedatConcordiaHighSchoolinthesameyear.Hegot___7___gradesintheschool,especially___8___biologyandchemistry,whichwasagreatcomfort.Michael___9___IndianaUniversityin1965asapre-medicalstudent,soonafterwards,histeacherspermittedhimtotakemorecoursesthan___10___.In1968,hewasacceptedbytheSchoolofMedicine,YaleUniversity.Ongraduationdayin1972,FrankandI___11___theceremonyatYale.Aftertheceremony,wetoldMichaelaboutthe___12___IQscorehegotwhenhewassix.Sincethatday,Michaelsometimeswouldlookatusandsay___13___,“MydearmomanddadnevertoldmethatIcouldn’tbeadoctor,notuntilafterIgraduatedfrommedicalschool!”Itishisspecialwayofthankingusforthe___14___wehadinhim.Interestingly,Michaelthen___15___anotherIQtest.Wewenttothesameclinicwherehehad__16___thetesteighteenyearsbefore.ThistimeMichaelscored126,anincreaseof36points.Aresultlikethatwassupposedtobe___17___.Childrenoftendoas___18___aswhatadults,particularlyparentsandteachers,___19___ofthem.Thatis,tellachildheis“___20___”,andhemayplaytheroleofafoolishchild.1、A．joy B．surprise C．dislike D．disappointment2、A．tearfully B．fearfully C．cheerfully D．hopefully3、A．student B．son C．friend D．doctor4、A．argued B．realized C．decided D．understood5、A．joke B．mistake C．warningDwonder6、A．specially B．strictly C．naturally D．carefully7、A．poor B．good C．average D．standard8、A．in B．about C．of D．for9、A．visited B．chose C．passed D．entered10、A．allowed B．described C．required D．offered11、A．missed B．held C．delayed D．attended12、A．high B．same C．low D．different13、A．curiously B．eagerly C．calmly D．jokingly14、A．faith B．interest C．pride D．delight15、A．lookedfor B．askedfor C．waitedfor D．preparedfor16、A．received B．accepted C．organized D．discussed17、A．imperfect B．impossible C．uncertain D．unsatisfactory18、A．honestly B．much C．well D．bravely19、A．hear B．learn C．expect D．speak20、A．wise B．rude C．shy D．stupid第二节（每小题1.5分，满分15分）阅读下面材料，在空白处填入1个适当的单词或括号内单词的正确形式。27．（15分）语法填空Shouldnaps（小睡）actually1．(take)duringtheday?Well,wecertainlyknowfrom2．(evident)inthesleepcenterandthatofmanyotherscientiststhatnapscangiveyoubenefitsforbothyourbrain3．yourbody.Butnapscanactuallybe4．double-edgedswordbecausewhilewe’reawakeduringtheday,we’rebuildingupsleepinessorsleeppressure.Sowhenyoutrytofallasleepatnight,you’llfallasleepquicklyandthenyou’llstayasleep.Andwhenwesleep,weactuallyreleasethatsleepinesssothatwewakeupthenextmorningfeeling5．(refresh).Soifyoutakeanapduringtheday,especiallyifyoutakeittoolateintheafternoon,youwillactuallyreleasesomeofthatsleepinessanditwillmakeitmuch6．(hard)tofallasleepandstayasleepsoundlythroughoutthenight.Sotheadvicewouldbeifyoudon’tstrugglewithyoursleepandyoucannap7．(regular),thennapsarejustfine.Butifyoudofinditdifficult8．(fall)asleeporstayasleepatnight,thenyoushouldavoidnapsandtrytobuildupthathealthysleepinessintheevening.Theidealnapdependson9．youwantfromthatnap.Differentstagesofsleepactuallygiveyoudifferenttypesofbrainandbody10．(benefit).第四部分写作（共两节）第一节短文改错（满分10分）28．（10分）假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。错误仅涉及一个单词的增加、删除或修改。增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词。删除：把多余的词用斜线（\）划掉。修改：在错的词下划一横线，并在该词下面写出修改后的词。注意：1、每处错误及其修改均仅限一词；2、只允许修改10处，多者（从第11处起）不计分。I’vebeenBritainfortwoyears、MyfriendsinChinasometimewritetome,askedmehowlongI’llstayhere,andwhenI’mthinkingofreturninghome、Theanswertotheirquestionissimple:Idonotknowhowtoreturnhome、Atthemoment,IhavenoreasontoreturnbacktoChina、IlikelivinginBritain:IenjoymeetingBritishpeopleandtravelaroundthecountry、IamexpectedtohavemorechancestoeattheBritishfood、Mystudyisveryinteresting,andtherearesomanythingsIdidn’tknowaboutBritainthatIhopetodiscoveritinthefuture、141第二节书面表达（满分25分）29．（25分）假如你是李华，你班将组织同学去参观当地有名的民俗文化村，请根据以下要点写一封邮件邀请外教Chris一同前往。1.集合时间：下周六上午8：00；2.集合地点：校门口；3.交通方式：乘坐大巴；4.活动内容：学做、品尝传统美食；欣赏布袋戏表演等。注意：1.词数100左右；2.可根据所提供的要点进行适当发挥；3.参考词：布袋戏：glovepuppetry；民俗文化村：folkculturevillage_______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

参考答案第一部分（共20小题，每小题1.5分，满分30分）1、B2、D3、B4、B5、C6、C7、B8、C9、A10、B11、C12、C13、C14、B15、C16、B17、C18、A19、B20、D第二部分阅读理解（满分40分）阅读下列短文，从每题所给的A、B、C、D四个选项中，选出最佳选项。21、1、B2、A3、C22、1、D2、B3、A4、D23、1、B2、C3、B4、D24、1、D2、C3、B4、A25、Anewstudysuggeststhatwashingdishesbyhandishealthierthanusingadishwasher.Nobodylikesdoingthedishes,butitturnsoutthatdoingthistaskmightpayoffinanunexpectedway.AccordingtoanewstudypublishedintheJournalofPediatrics,washingdishesbyhandinsteadofusingadishwashermightpreventthedevelopmentofallergies(过敏).ResearchersinSwedensurveyedtheparentsof1,029childrenaged7and8.Theydiscoveredthatchildrenwhosefamilieshand-washedthedishesinsteadofusingamachinewerelesslikelytohaveallergies.Earlierresearchhasshownthatdisheswashedbymachinearecleanerthanthosewashedbyhand.Sowhywouldkidswhoeatoffofslightlydirtierplatesbebetteroffwhenitcomestopreventingallergies?Oneexplanationisbasedonatheoryknownas