2023-2024学年河南省豫北豫南名校高三下学期联合考试英语试题含解析_第1页
2023-2024学年河南省豫北豫南名校高三下学期联合考试英语试题含解析_第2页
2023-2024学年河南省豫北豫南名校高三下学期联合考试英语试题含解析_第3页
2023-2024学年河南省豫北豫南名校高三下学期联合考试英语试题含解析_第4页
2023-2024学年河南省豫北豫南名校高三下学期联合考试英语试题含解析_第5页
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2023-2024学年河南省豫北豫南名校高三下学期联合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、考场号和座位号填写在试题卷和答题卡上。用2B铅笔将试卷类型(B)填涂在答题卡相应位置上。将条形码粘贴在答题卡右上角"条形码粘贴处"。2.作答选择题时,选出每小题答案后,用2B铅笔把答题卡上对应题目选项的答案信息点涂黑;如需改动,用橡皮擦干净后,再选涂其他答案。答案不能答在试题卷上。3.非选择题必须用黑色字迹的钢笔或签字笔作答,答案必须写在答题卡各题目指定区域内相应位置上;如需改动,先划掉原来的答案,然后再写上新答案;不准使用铅笔和涂改液。不按以上要求作答无效。4.考生必须保证答题卡的整洁。考试结束后,请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.Thecaraccidenthappened_____hiscarwasoutoforder___Ican’tdrive.A.notthat;butthat B.notonly;butalsoC.notbecause;butbecause D.notbecause;butas2.Someexpertsthink,________genes,intelligencealsodependsonanadequatediet,agoodeducationandanicehomeenvironment.A.insteadof B.exceptforC.apartfrom D.farfrom3.Thepeoplesucceededbecausetheyunderstoodthatyoucan’tletyourfailures_________you——youhavetoletyourfailuresteachyou.A.defineB.declineC.qualifyD.simplify4.—Jackhasbeenoutofconsciousnesssincetheaccident.Willhecometohimself,doctor?—It’sgoingtobetoughbutweanticipatethathewill.A.putthroughB.pullthroughC.putoverD.pullover5.Don’tthrowawaytheoldbooks.Givethemto____needsthem.A.whoever B.anyone C.who D.whomever6._____atthedifferencesbetweenhercultureandtheirs,Anniewantedtoreturnhome.A.ConfusingB.ConfusedC.HavingconfusedD.Toconfuse7.Mollyfinallyagreed,_____reluctantly,togoandseeadoctor.A.afterwards B.almostC.otherwise D.somewhat8._______progressitis,youcan’tstopmovingforward.A.WhatevergreatB.HowevergreatC.NomatterhowgreatD.Howgreata9.ItisbroadcastonTVthatthe88thAcademyAwardCeremonywasheldinDolbyTheatreseatsanaudienceofapproximately4,000.A.where B.whoseC.which D.when10.Allwehaveis24precioushoursadayandthereforeweshallwaste______A.nothingB.noneC.neitherD.noone11.---Sorry!I’mafraidthatIcan’tgotothemagicshowbyDavidCopperfieldwithyou.---.A.Itdoesn’tmatter.B.Doasyoulike.C.Whatashame.D.Takeiteasy.12.Thecountry’schiefexportsarecoal,carsandcottongoods,cars_____themostimportantofthese.A.havebeenB.areC.beingD.arebeing13.Aftertheflooding,peopleweresufferinginthatarea,________urgentlyneededcleanwater,medicineandsheltertosurvive.A.which B.whoC.where D.what14.—John,doyouknowwhythesuspectwassetfree?—Forlackof________evidence.A.solidB.apparentC.ambiguousD.concrete15.Theproblemwiththecurrentsystemallowsanyonetocommitasimilarcrimewithout.Itneedstobefixed.A.beingpunishedB.punishedC.topunishD.punishing16.Hisadvicemademehappy,but____othersangry.A.making B.tomake C./ D.make17.Someanalystssuspectedthattherebellionwas_______andfinancedbyawesterncountry.A.launchedB.backedC.evaluatedD.crushed18.Whethersomethingisaliveordeadisacrucial______anditisonethatchildrenhavenodifficultyunderstandingbytheageoffive.A.declaration B.distinction C.division D.distribution19.Thehousecaughtfirelastweek,withlittleoftheoriginalbuilding_________.A.remainB.remainedC.remainsD.remaining20.AsoneofthemostpopularartistsintheUS,notonly_______withherhitsongs,buthasinspiredwomenwithherdevotiontocharity.A.hasBeyonceinfluencedpopculture B.influencedpopculturehasBeyonceC.Beyoncehasinfluencedpopculture D.influencedpopcultureBeyoncehas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)Toeatonlyavegan(素食的)dietmightsounddifficult,especiallywithmanypopulardishescontainingmeatorotheranimalproducts.Yetin2017,veganismwasdescribedas“thefastest-growinglifestylemovement”intheUK,accordingtoBBCnews.AstudybyaUKmarketresearchorganization,suggeststhatover542,000Britswentveganduringthepreviousdecade,anincreaseof360%.Andthemainforcebehindthisincreasewasthoseaged15-34yearsold—42%ofrecentvegansfallunderthatagerange.SowhyexactlyhasveganismbecomesopopularamongyoungBrits?Onereasoncouldbethatmanyyoungpeoplewanttoprotecttheenvironment,aslessmeatconsumptionisknowntobebeneficialtotheenvironment.Globalmeatmanufacturingisbelievedtocause18%oftheworld’sgreenhousegasemissions(排放),evenmorethanthatofalltheworld’scars,trainsandplanescombined.Anotherreasonisthatmanyoftoday’syoungpeoplebelievethatit’swrongtokillanimalstobeusedasfood.JessMurray,22,astudentatUniversityCollegeLondon,saidthathechosetobecomeveganafterrealizingthateatinganimalsisachoicethatpeoplemake,ratherthansomethingthatweneedtodotosurvive.“Becomingveganwasanethical(道德的)decision,”hetoldtheGuardian.Socialmediaisalsobelievedtohavegivenrisetotheincreaseinveganism.PlatformssuchasFacebookallowyoungveganstoconnectwitheachothermucheasier,whileotherssuchasInstagramhaveledtothecreationof“vegancelebrities(名人)”,whosharelipsonveganlifestyles.Despitetherisingofveganism,LauraWyness,anexpertindietandnutrition,saidthatmeatisveryimportantforpeople’shealth.“Astrictvegandietmakesitdifficulttogetsomemineralsandvitaminsthatyourbodyneeds,”WynesstoldBBCnews.However,thepopularityofveganismdoesn’tseemtobefading.“Itfeelsmorelikethisissomethingthatissticking.”saidanexpertoftheVeganSociety,aUKcharitythatpromotesveganism.1、Whatcanwelearnaboutveganism,“thefastest-growinglifestylemovement”inUK?A.Ithascreatedmanypopulardishes.B.Itisbackedupmainlybyoldpeople.C.Ithasledtofurthermarketresearch.D.Ithasgrownsteeplyinthepast10years.2、ThefollowingmayaccountfortheincreaseinveganismEXCEPT.A.Youngpeoplepreferanenvironment-friendlylife.B.Youngpeoplewanttobecomeethicalcelebrities.C.Mealmanufacturingcontributesalottotheworld’sgreenhousegas.D.Socialmediaallowtheveganmessagetospreadquicklyaround.3、Theunderlinedword“sticking”intheIasiparagraphisequaltoinmeaning.A.importantB.specialC.lastingD.impressive4、Whichofthefollowingwillserveasthebesttitleofthepassage?A.YoungBritsGoingVeganB.VeganismComesFirstC.HowtoStartaVeganLifestyleD.VeganismandtheEnvironment22.(8分)Myfriends,EmmaDaniels,spentthesummerof1974travelinginIsrael.Duringhermonth-longstayinJerusalemsheoftenwenttoacafécalledChocolateSoup.Itwasrunbytwomen,oneofwhom–Alex–usedtoliveinMontreal.OnemorningwhenEmmawentinforcoffee,whilechattingwithhernewfriendAlex,shementionedthatshehadjustfinishedthebookshewasreadingandhadnothingelsetoread.Alexsaidhehadawonderfulbookshemightlike,andthathe’dbehappytolendittoher.Ashelivedjustabovethecafé,hequicklyranuptogetit.ThebookhehandedtoEmmajustminuteslaterwasMarkings,abookbyaformerSecretary-GeneraloftheUnitedNations(UN).Emmahadneverreadit,norhadsheeverboughtacopy.But,whensheopeneditup,shewasflooredtoseeherownnameandaddressinsidethecoverinherownhandwriting.Itturnedoutthatthesummerbefore,ataconcertbackinMontreal,EmmahadmetaCalifornianwhowasintownvisitingfriends.Theydecidedtoexchangeaddresses,butneitherofthemhadanypaper.ThemanopenedupabookhewascarryinginhisbackpackandaskedEmmatowritehernameandaddressinside.WhenhereturnedtoCalifornia,heleftthebookbehindinMontreal,andhisfriendAlexkeptit.WhenAlexlatermovedtoJerusalcm,hetookthebookalong.1、AlexlentEmmathebook,Markings,_____.A.toshowhisfriendlinesstoherB.toshowhisinterestinreadingC.totellherabouttheimportanceofUND.toletherwritehernameandaddressinside2、HowdidEmmafeelthemomentsheopenedthebook?A.Pleased. B.Satisfied.C.Worried. D.Surprised.3、WecanlearnfromthetexttheCalifornian.A.metEmmaataconcert B.invitedEmmatoaconcertC.introducedEmmatohisfriend D.leftEmmahisbackpack23.(8分)“Haveaniceday!”maybeapleasantgestureorameaninglessexpression.WhenmyfriendMaxiesays“Haveaniceday”withasmile,Iknowshesincerelycaresaboutwhathappenstome.Ifeellovedandsecuresinceanotherpersoncaresaboutmeandwishesmewell.“Haveaniceday.Next!”Thisversionoftheexpressionisspokenbyasalesgirlatthesupermarketwhoisrushingmeandmygroceriesoutthedoor.Thewordscomeoutinthesametone(腔调)withafixedprocedure.Theyarespokenatme,nottome.Obviously,theconcernformydayandeveryoneelse’sisthemanagement’sattempttoincreasebusiness.Theexpressioninoneofthosebehaviorsthathelppeoplegetalongwitheachother.Sometimesitindicatestheendofameeting.Assoonasyouhearit,youknowthemeetingisatanend.Sometimestheexpressionsavesuswhenwedon’tknowwhattosay.“Oh,youjusthadatoothout?I’mterriblysorry,buthaveaniceday.”Theexpressioncanbepleasant.Ifastrangersays“Haveaniceday!”toyou,youmayfinditheart-warmingbecausesomeoneyoudon’tknowhastriedtobenicetoyou.Althoughtheuseoftheexpressionisaninsincere,meaninglesssocialcustomattimes,thereisnothingwrongwiththesentenceexceptthatitisalittleuninteresting.Thesalesgirl,thewaitress,theteacher,andallthecountlessotherswhospeakitwithoutthinkingmaynotreallycareaboutmyday.Butinastrangeandcomfortableway,it’snicetoknowtheycareenoughtopretendtheycarewhentheyreallydon’tcareallthatmuch.Whiletheexpressionmaynotoftenbesincere,itisalwaysspoken.Thepointisthatpeoplesayitallthetimewhentheylike.1、WhatdoestheunderlinedsentenceinParagraph2mean?A.Thesalesgirlisimpolite.B.Thesalesgirlisangry.C.Thesalesgirlcaresabouttheauthor.D.Thesalesgirlsaysthewordsasaroutine.2、Bysaying“Haveaniceday!”,astrangermay________.A.trytobepolitetoyouB.expressthankstoyouC.givehisblessingtoyouD.sharehishappinesswithyou3、Whatisthebesttitleofthepassage?A.HaveaNiceDay—aPoliteEndingofaConversationB.HaveaNiceDay—aPleasantGestureC.HaveaNiceDay—aHeart-warmingGreetingD.HaveaNiceDay—aSocialCustom24.(8分)阅读理解Onthefirstdayofschoolourprofessorintroducedhimselfandchallengedustogettoknowsomeonewedidn'tknow.Ilookedroundwhenagentlehandtouchedmyshoulder.Iturnedaroundtofindawrinkled,littleoldladywithasmile.Shesaid,“Hi,handsome.MynameisRose.I'meighty­sevenyearsold.CanIgiveyouahug?”Ilaughedandenthusiasticallyresponded,“Ofcourseyoumay!”Shegavemeagiantsqueeze.“Whyareyouincollegeatsuchayoung,innocentage?”Iasked.“IalwaysdreamedofhavingacollegeeducationandnowI'mgettingone!”shetoldme.AfterclasswewalkedtotheStudentUnionbuildingandsharedachocolatemilkshake.Webecameinstantfriends.Everydayofthenextthreemonthswewouldleaveclasstogetherandtalknon­stop.Iwasalwayslisteningtothis“timemachine”asshesharedherwisdomandexperiencewithme.Overthecourseoftheyear,Rosebecameacampusicon(偶像)andsheeasilymadefriendswherevershewent.AttheendofthesemesterweinvitedRosetospeakatourfootballdinner.I'llneverforgetwhatshetaughtus.“Wedonotstopplayingbecauseweareold;wegrowoldbecausewestopplaying.Thereisahugedifferencebetweengrowingolderandgrowingup.Anybodycangrowolder.Thatdoesn'ttakeanytalentorability.Theideaistogrowupbyalwaysfindingopportunitiesinchange.Havenoregrets.Theelderlyusuallydon'thaveregretsforwhatwedid,butratherforthingswedidnotdo.Theonlypeoplewhofeardeatharethosewithregrets.”Sheconcludedherspeechbycourageouslysinging“TheRose”.Shechallengedeachofustostudythelyrics(歌词)andlivethemoutinourdailylife.Attheyear'sendshefinishedthecollegedegreeshehadbegunallthoseyears.OneweekaftergraduationRosediedpeacefullyinhersleep.1、Whathappenedtotheauthoronthefirstdayofschool?A.Hegottoknowanoldprofessor.B.Hemadetheacquaintanceofanoldlady.C.HejoinedtheStudentUnion.D.Hehadtoshareamilkshakewithothers.2、FromtheunderlinedsentenceinParagraph1,wecanfindouttheauthor's________.A.concernaboutageB.respectfortheoldC.curiosityabouttheladyD.complaintabouteducation3、Intheauthor'seyes,________.A.RosewasinnocentandgenerousB.RosewaswiseandskilledC.Rosewastalentedandhard­workingD.Rosewascourageousandherwordswereinspiring4、WhichsayingmightRosepossiblysupport________.A.Oneisnevertoooldtolearn.B.Afriendinneedisafriendindeed.C.Romewasn'tbuiltinaday.D.Itisnousecryingoverspiltmilk.25.(10分)AstudypublishedinBloodPressureMonitoringstatedthatsittingwithyourlegscrossedcanincreaseyourbloodpressure.Thereasonthishappensisbecausethebloodinyourlegshastoworkagainstgravitytobepumpedbacktoyourheart,crossingonelegovertheotherincreasesresistance,makingitevenharderforthebloodtocirculate.Thiscausesyourbodytoincreaseyourbloodpressuretopushthebloodbacktotheheart.Youwon’tfeelanyimmediateeffects,butifyousitforlongperiodsoftimeit’simportantthatyoutakenoteofhowlongyouhaveyourlegscrossedfor.Youshouldn’thaveyourlegscrossedformorethan15minutes,andit’simportantthatyougetupandwalkaroundatleastonceeveryhour.Crossingyourlegscanalsoleadtoneckandbackpain.Ideally,it’sbestforourbodiestositwithourfeetplantedflat,hipwidthapart,onthefloor,butit’snoteasytomaintainperfectposturealldayattheoffice.Whenyousitwithyourlegscrossedyourhipsareinatwistedposition,whichcancauseoneofyourpelvicbonestorotate.Sinceyourpelvicbonesupportsyourneckandspine,thiscancausepressureonyourlowerandmiddlebackandneck.Youalsomightnoticethatwhenyousitwithyourlegscrossedforlongperiodsoftimeyourfeetandlegsgettinglyorhavethefeelingofbeingasleep.Thisisbecausewhenonelegsitsontopoftheotheritcausespressureontheveinsandnervesinyourlegsandfeet.Itcancausenumbnessand/ortemporaryparalysisinthelegs,ankles,orfeet.Whilethefeelingofdiscomfortmayonlylastaminuteortwo,repeatedlycrossingyourlegsuntiltheyfeelnumbcancausepermanentnervedamage.1、Whatcanbelearnedfromthetext?A.Wewillfeelbloodpressureincreasedimmediatelyaftercrossinglegs.B.It’seasyforustokeepcorrectpostureallday.C.Thepelvicbonecancausepressureonyourlowerandmiddlebackandneck.D.Yourlegswillgetpainwithlegscrossedforlongperiodsoftime.2、Crossingyourlegsmaycausesomehealthproblemsexcept___________.A.Causingthepainofneckandback.B.Increasingthebloodpressure.C.Leadingtothepainoffeetandlegs.D.Resultinginthedisabilityofarms.3、Whatissuggestedaccordingtothetext?A.Donotoftencrossyourlegswhilesitting.B.Crossyourlegsformorethan15minuteseveryday.C.Getupandwalkaroundatleastonceeveryotherhour.D.Crossyourlegstoloweryourbloodpressure.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)ManyyearsagoinasmallIndianvillage,afarmerhadthemisfortuneofowingalargesumofmoneytoavillagemoneylender.Themoneylender,whowasoldandugly,1thefarmer’sbeautifuldaughter.Soheproposeda2.Hesaidhewouldforgivethefarmer’s3ifhecouldmarryhisdaughter.Boththefarmerandhisdaughterwerehorrifiedbythe4.Sothecunningmoneylendersuggestedthatheputa5pebble(鹅卵石)andawhitepebbleintoanemptymoneybag,6thegirlwouldhavetopickonepebblefromthebag.7shepickedtheblackpebble,shewouldbecomehis8andherfather’sdebtwouldbeforgiven.Ifshepickedthewhitepebbleshe9marryhimandherfather’sdebtwouldstillbeforgivenifshe10topickapebble,herfatherwouldbethrownintojail.Theywerestandingonapebble-strewn11inthefarmer’sfieldwhenthemoneylenderbentoverto12twopebble.Ashepickedthemup,thesharp-eyedgirl13thathehadpickeduptwoblackpebblesandputthemintothebeg.Thegirlputherhandintothemoneybaganddrewouta14.Withoutlookingatit,shefumbledandletit15ontothepebble-strewnpathwhereit16becamelostamongalltheotherpebbles.“Oh,how17ofme!”shesaid.“Butnevermind,ifyoulookintothebagfortheonethatis18,youwillbeabletotellwhichpebbleIpicked.”Themoneylenderdarednotadmithis19.Thegirlchangedwhatseemedan20situationintoanextremelyadvantageousone.1、A.enviedB.marriedC.fanciedD.helped2、A.meetingB.changeC.bargainD.toast3、A.debtB.paymentC.faultD.pride4、A.thoughtB.adviceC.planD.proposal5、A.sharpB.blackC.commonD.small6、A.forB.andC.butD.or7、A.BecauseB.AlthoughC.IfD.Since8、A.moneylenderB.servantC.wifeD.daughter9、A.couldn’tB.shouldn’tC.mustn’tD.needn’t10、A.pretendedB.agreedC.refusedD.decided11、A.pathB.areaC.placeD.garden12、A.throwawayB.askforC.pickupD.pointat13、A.ignoredB.warnedC.noticedD.suggested14、A.pennyB.pebbleC.coinD.piece15、A.rollB.fallC.flyD.move16、A.interestinglyB.mysteriouslyC.unexpectedlyD.immediately17、A.clumsyB.forgetfulC.stupidD.hopeless18、A.heldB.chosenC.foundD.left19、A.dishonestyB.worryC.mistakeD.guilt20、A.impossibleB.embarrassingC.urgentD.unbelievable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)JaneGoodallwasborninLondon,England1.April3,1934.Whenshewasayounggirl,Jane2.(spend)asmuchtime,outsideasshecould.ShelovedtheTarzanstories.At3.ageofeleven,JanedecidedtogotoAfrica.Asayounglady,herpassiongrow4.(strong),andwhenaclosefriendinvitedhertoKenyain1957,Janeimmediatelyaccepted.AfterearningherPhD,shereturnedtoTanzaniatocontinueobservingchimpanzees(黑猩猩).There,throughherhardwork,chimpanzees5.(record)forthefirsttimeaseatingmeat.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。每处错误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。MyfatheristhemanIrespectmost、Strictashemaybe,howeverheneverfailstoshowhercareandconsideration、OnceIbrokeaneighborwindow、Seeingnobodyaround,Iranawayimmediately、WhenDadcamehome,henoticedmyuneasinessandaskedmewhathashappened、Icouldonlytellhimatruth、Insteadofscold,hepraisedmyhonestyandthenencouragedmetoapologizeourneighbor、IlearnedfromthisincidentthatnotonlydoesDadtakecareofmyhealthandhealsoteachesmewhattobeagoodcitizen、HowluckilyIamtohavesuchagoodfather!第二节书面表达(满分25分)29.(25分)我校高二年级正在举办主题为“ApersonalhabitI’dliketochange”的英语演讲比赛。请你根据该主题要求写一篇演讲稿来参与此活动,具体要求如下:1.简述你想改变的这一行为习惯;2.说明你想改变这一习惯的理由及措施;3.词数100左右。Goodmorning,everyone.Standinghere,Ifeelextremelyhonoredtodeliveraspeechtoallofyou.Thetopicofmyspeechis__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________Thankyouforyourlistening!

参考答案第一部分(共20小题,每小题1.5分,满分30分)1、C2、C3、A4、B5、A6、B7、D8、A9、C10、B11、C12、C13、B14、A15、A16、C17、B18、B19、D20、A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、D2、B3、C4、A22、1、A2、D3、A23、1、D2、A3、D24、Everyday,peoplecomeintocontactwiththousandsofchemicals.Thesechemicalsaresaidtobeharmlesstohumanhealth.Infact,thechemicalsareconsideredsosafethatwewashwiththem.Weputthemonourbodiesandevenourfaces.Otherchemicalproductsareusedthroughoutourhomes.Bythetimeyouwalkoutofyourfrontdoor,youhavealreadybeenexposedtothousandsofchemicals.Onitsown,eachchemicalseemsharmless.Butincombinationwithotherchemicals,theymaybecomedeadly.Thatisthefindingofatwo-yearstudybyahigh-profiletaskforceofscientists.Thetaskforcewastoldtoinvestigatethecancer-causingpossibilityofchemicalmixtures.LindaGulliverwasoneof174scientistsonthetaskforce.Theirjobwastostudythecancer-causingpotentialof85chemicals.All85aresaidtobecommonintheenvironment.Ms.Gulliverexplainsthatchemicalshavethepotentialorytoformdangerousmixtures.Evensimplemineralscanbecomedangerouswhenmixedwithchemicalsfoundinplasticsorbeautyproducts.Workingingroups,thescientistsexploredhowdifferentchemicalmixturescouldleadtocancer.Ms.Gulliver’steamlookedattheabilityofdifferentcombinationstosupportthein-creaseofmalignant(恶性的)humancells.Shesaysthecurrentwaytoidentifywhetherchemicalscausecanceristotestthemoneatatime.Thismethodleads,sheadds,toalonglistofsupposedly“safe”chemicals.Sheandherteamsaythatapproachneedstochange.“Wedefinitelyneedcertainresearch…tofindoutwhatmixturesofchemicalswouldbemoreharmfulthanothers;whatgroupsofchemicals,whentogether,wou

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