徐汇区2023学年第一学期质量监控试卷-高三英语(含标准答案)

徐汇区2023学年第一学期质量监控试卷-高三英语(含标准答案) 2023届高三徐汇区高三英语一模2023.12II.GrammarandvocabularySectionADirections:Afterreadingthepassagebelow,fillintheblankstomakethepassagecoherentandgrammaticallycorrect.Fortheblankswithagivenword,fillineachblankwiththeproperformofthegivenword;fortheotherblanks,useonewordthatbestfitseachblank.Pleasemindthesilence Despitebeingusedby1.34billionpeopleeachyear,travelingontheTubeinLondoncanactuallybequitelonely.Anunwrittenruleencouragingsilence,mixedwithclassicBritishreserve,meansthat(21)__________you’repackedintoanenclosedspacewithhundredsofotherpeople,themorningcommute(上下班)canleaveyoufeelingsomewhatisolated. OneLondonresident,however,istryingtochangethis. “YougetontheTubehereandifscompletelysilentandifsweird,"saysJonathanDunne,42,anAmericanlivinginLondon,whohas,ironically,started(22)_______worldwidedialogueaftergivingoutbadges(徽章)withtheslogan“Tubechat?〞lastmonth,encouragingcommutersinLondontogettalkingtooneanother.“Ihandedout500badgesduringrushhourinacityof8million,expectingmanyrefusalsandmostofthem(23)_______(throw)away,butafterabout24hoursitcompletelysnowballed,〞hesays.Dunneandhis“Tubechat〞campaign(24)_______(feature)inmediaacrosstheworldeversince,seeingTVinterviewsinSweden,BrazilandtheUK,aswellascountlesswebsite,newspaperandmagazineappearances.AlthoughDunnesayshe’sreceivedmostlypositivefeedback,noteveryoneagreeswithhissentiment.LondonerBrianWilsonrespondedwithacampaignof(25)_____own,handingout500badgeswiththewords‘‘Don’teventhinkaboutit〞onthem.“I(26)______hardlystandtheideaofhavingtotalktostrangersontheTubeonmywaytowork,〞hetoldtheBBC.MichaelRobinson,24,astudentfromLondon,agrees.“BeingontheTubeistheonlypeaceandquietsomepeoplegetontheirjourneystoand(27)______work.Itdoesn’tneedtobespoiledbypeoplecomingupandchattingtoyou,〞hesays.WhileLondonhasitsseeminglyantisocialsetofregulationstofollow,noteverywherelacksasenseofcommunity.DoesDunnehopethatsomeofthiscommunityspirit(28)__________(mirror)intheUKfollowinghiscampaign?“PeopleassumethatIjustwalkupandtalktostrangers,(29)______Idon’t,butit’sbeenagreatwaytomeetpeopleyouwouldneverhavenormallyspokento,〞hesays.“OnMonday,Oct10,thecurator(馆长)oftheLondonTransportMuseumhadmeoverfortea.〞Soifyoueverendup(30)______(use)publictransportintheWest,whynotsayhellotothepersonnexttoyou?Justmakesuretocheckforabadgefirst.SectionBDirections:Fillineachblankwithaproperwordchosenfromthebox.Eachwordcanbeusedonlyonce.Notethatthereisonewordmorethanyouneed.A.overtook B.promising C.likelihood D.ridiculous E.shared F.controlledGbeliefs H.reasonable I.trend J.tracked K.demonstratedTheriseinstoriesdescribingeventsthatneverhappened,ofteninvolvingfakepeopleinfakeplaces,hasledtoFacebookandGoogle’s(31)____todealwiththem.Butarewereallysoeasytofool?Accordingtoseveralstudies,theanswerisyes:eventhemostobviousfakenewsstartstobecomebelievableifit’s(32)_____enoughtimes.InthemonthsrunninguptotheUSelectiontherewasasurge(大浪)infakenews.AccordingtoananalysisbyCraigSilverman,ajournalist,duringthistimethetop20fakestoriesincirculation(33)_____thetop20storiesfrom19mainstreampublishers.PaulHorner,acreativepublisheroffakenews,hassaidhebelievesDonaldTrumpwaselectedbecauseofhim.“MysiteswerepickedupbyTrumpsupportersallthetime…Hisfollowersdon’tfact-checkanything–they’llposteverything,believeanything,〞hetoldtheWashingtonPost.Silvermanpreviously(34)_____rumourscirculatingonlinein2023andfoundthatsharesandsocialinteractionsaroundfakenewsarticlesdwarfed(使...相形见绌)thoseofthearticlesthatexposedthem.AccordingtoSilverman,fakenewsstoriesareengineeredtoappealtopeople’shopesandfears,andaren’t(35)_____byreality,whichgivesthemtheedgeincreatingshareablecontent.Youmightthinkyou’reimmunetofallingfortheselies,butawealthofresearchdisagrees.Backinthe1940s,researchersfoundthat“themorearumouristold,themore(36)_____itsounds〞.Theysuggestedthismeansthatarumourbornoutofmildsuspicioncan,bygainingcurrency,shiftpublicthinkingandopinion.Thisfalseimpressionoftruthwas(37)_____practicallyin1977whenresearchersintheUSquizzedcollegestudentsontheactualityofstatementsthattheyweretoldmaybetrueorfalse.Theresearchersfoundthatsimplyrepeatingthestatementsatalaterdatewasenoughtoincreasethe(38)______ofthestudentsbelievingthem.Lastyear,LisaFazioatVanderbiltUniversityinTennesseeandherteamfoundthatstudentsbecomemorelikelytobelieveastatementthattheyknowmustbefalseifitisrepeated.“Ourresearchsuggeststhatfalsenewscanandlikelydoesaffectpeople’s(39)_____.Evenifpeopleareconsciousthataheadlineisfalse,readingitmultipletimeswillmakeitseemmoretrustworthy,〞Faziosays.Reassuringly,theteamfoundthataperson’sknowledgestillhasalargeinfluenceovertheirbeliefs,butit’sstillaworrying(40)______giventhatfalsehoodsappearrepeatedlyinournewsfeedseveryday.III.ReadingComprehensionSectionADirections:ForeachblankinthefollowingpassagetherearcfourwordsorphrasesmarkedA,B,CandD.Fillineachblankwiththewordorphrasethatbestfitsthecontext.Twokeyclimatechangeindicators—globalsurfacetemperaturesandArcticseaiceextent—havebrokennumerousrecordsthroughthefirsthalfof2023,accordingtoNASAanalysesofground-basedobservationsandsatellitedata.Eachofthefirstsixmonthsof2023setarecordasthewarmest(41)________monthgloballyinthemoderntemperaturerecord,which(42)______1880,accordingtoscientistsatNASA'sGoddardInstituteforSpaceStudies(GISS)inNewYork.Thesix-monthperiodfromJanuarytoJunewasalsotheplanet'swarmesthalf-yearonrecord,witha(n)(43)________temperature1.3degreesCelsius(2.4degreesFahrenheit)warmerthanthelatenineteenthcentury.Fiveofthefirstsixmonthsof2023also(44)_______thesmallestrespectivemonthlyArcticseaice(45)_______sinceregularsatelliterecordsbeganin1979,accordingtoanalysesdevelopedbyscientistsatNASA'sGoddardSpaceFlightCenter,inGreenbelt,Maryland.Theone(46)_____,March,recordedthesecondsmallestforthatmonth. (47)_____thesetwokeyclimateindicatorshavebrokenrecordsin2023,NASAscientistssaiditismoresignificantthatglobaltemperatureandArcticseaicearecontinuingtheirdecades-longtrendsofchange.Bothtrendsareultimatelydrivenbyrising(48)_______ofheat-trappingcarbondioxideandothergreenhousegasesintheatmosphere.TheextentofArcticseaiceatthepeakofthesummermeltseasonnowtypically(49)______40percentlessareathanitdidinthelate1970sandearly1980s.ArcticseaiceextentinSeptember,theseasonallowpointintheannualcycle,hasbeen(50)_______atarateof13.4percentperdecade. "WhiletheElNiñoeventinthetropicalPacificthiswinter(51)_______thegainingglobaltemperaturesfromOctober,itisthebasictrendwhichisproducingtheserecordnumbers,"GISSDirectorGavinSchmidtsaid. (52)______ElNiñoeventshavedriventemperaturestowhatwerethenrecordlevels,suchasin1998.Butin2023,evenastheeffectsoftherecentElNiñowearoff,globaltemperatureshaverisenwellbeyondthoseof18yearsago(53)_______theoverallwarmingthathastakenplaceinthattime.Theglobaltrendinrisingtemperaturesfallsbehindtheregional(54)_____intheArctic,saidWaltMeier,aseaicescientistatNASAGoddard."Ithasbeenarecordyearsofarforglobaltemperatures,buttherecordhightemperaturesintheArcticoverthepastsixmonthshavebeenevenmoreextreme,"Meiersaid."Thiswarmthaswellasunusualweather(55)______haveledtotherecordlowseaiceextentssofarthisyear."41.A.resistant B.respective C.resolved D.remote42.A.makessenseof B.keepsupwith C.datesbackto D.goesaheadof43.A.average B.ordinary C.common D.temporary44.A.confirmed B.witnessed C.involved D.conducted45.A.standard B.content C.amount D.extent46.A.datum B.example C.month D.exception47.A.While B.When C.After D.As48.A.combinations B.reductions C.concentrations D.applications49.A.includes B.covers C.approaches D.indicates50.A.increasing B.changing C.declining D.moving51.A.endedupwith B.gaveriseto C.brokeawayfrom D.resultedfrom52.A.Frequent B.Natural C.Disastrous D.Previous53.A.inreturnfor B.incaseof C.inspiteof D.becauseof54.A.warming B.falling C.gathering D.changing55.A.forecasts B.varieties C.patterns D.illustrationsSectionBDirections:Readthefollowingthreepassages.Eachpassageisfollowedbyseveralquestionsorunfinishedstatements.ForeachofthemtherearefourchoicesmarkedA.B.CandD.Choosetheonethatfitsbestaccordingtotheinformationgiveninthepassageyouhavejustread.A Lateoneautumndayattheaquaticcenter(水上运动中心〕inAncenis,France,somethingwentquietly,horriblywrong.An18-year-oidnamedJean-FrancoisLeRoywasaregular,comingoftenintheearlyeveningstoswiminthe25-meterpool.Drowningsareoftendifficulttospot.Mostarenear-silentincidentswherethevictimquicklysinksoutofview.Onthisparticulardaymaybethelifeguardsweren'tpayingascloseattentionastheyshouldhavebeen.CertainlytheybelievedthetallathleticLeRoywasnotahigh-riskswimmer. ButonthiseveningLeRoywaspracticingapnea(屏气)swimming—testinghowfarhecouldswimunderwaterononebreath—andatsomepoint,withoutmakinganyvisibleoraudibledisturbanceonthewater'ssurface,helostconsciousness.Theguardsfailedtonoticeashestoppedswimmingandsanktothebottomofthedeependofthepool.Withhisarmscrossedoverhisheadandhisfeettwitching(抽搐),hewasunconsciousanddrowning.Itwouldlakehimaslittleasfourminutestodie.Althoughthehumanlifeguardswitchingthepoolwereunaware,12largemachineeyesdeepunderwaterwerewatchingthewholethingandtakingnotice.Justninemonthsearlierthecenterhadinstalledastate-of-the-artelectronicsurveillancesystemcalledPoseidon,anetworkofcamerasthatfeedsacomputerprogrammedtouseasetofcomplexmathematicalproceduretodistinguishbetweennormalanddistressedswimming.Poseidoncoversapool'sentireswimmingareaandcandistinguishamongdimreflections,shadows,andactualswimmers.Itcanalsotellwhenrealswimmersaremovinginawaythey'renotsupposedto.Whenthecomputerdetectsapossibleproblem,itinstantlyactivatesabeepertowarnlifeguardsanddisplaystheexactincidentlocationonamonitor.Therestisuptothehumansabovethewater.SixteensecondsafterPoseidonnoticedthelarge,sinkinglumpthatwasJean-FrancoisLeRoy,lifeguardshadLeRoyoutofthepoolandgavehimfirstaid.Hestartedbreathingagain.Afteronenightinthelocalhospital,hewasreleasedwithnopermanentdamage.Poseidonhadsavedhislife.56. Peoplesometimesfailtodetectaccidentsintheswimmingpoolbecause________. A.lifeguardsneglecttheirduties B.drowningmendon’tstruggleinwater C.thereisnoelectronicsurveillancesysteminstalled D.drowningsoftenoccurquietlyandquickly57. WhichofthefollowingstatementsinNOTtrue? A.LifeguardswillgivewaytoPoseidonsystem.B.Poseidonsystemcanlocatedrowningincidents.C.Poseidonsystemcanpickoutunusualswimmers.D.LifeguardswillcountonPoseidonsystem.58.Thepurposeofthispassageisto______________.A.publicizeamachinewhichcanwatchoutforswimmersindistressB.tellpeoplewhatmayhappeninaswimmingpoolC.warnswimmersnottoswimunderwateraloneD.advertiseanaquaticcenterequippedwithstate-of-the-artdevicesBThefirstanimalsonearthwereneverabletoachievemuchintheworldbecausetheylivedinthesea,whichprovidedlimitedoxygen,andtheyhadnobackbone.Foragesthereweremanykindsoftheseanimalslivingintheseaandonland.Theydifferedwidelyfromeachotherandincludedsuchcreaturesasinsectsandworms.Theyhadnobrain,andthereforenoneoftheseanimalswithoutabackbonehaseverbeenofmuchimportance.Theyarewonderfullymadebutdiffersowidelythatitisreallyimpossibletoarrangetheminasimpleorder.However,thosewhostudythedifferentkindsofbackbonedanimalsfindtheycanallbearrangedinasimpleway.Moreimportantly,itispossibletoshowwhichclassevolvedfirst,whichlast,andsoon.Thefivegreatclassesofbackbonedanimalsare:fishes,amphibian,reptiles,birdsandmammals.Acommonamphibianisthefrogwhichisabletoliveinwaterandonland.Amammalfeedsitsyoungbygivingmilk.Thereareverygreatdifferencesbetweenafish,afrog,ahorse,abirdandaman;yettheyallhaveabackbone.Agreatstepwastakenwhensomecreaturesswamashore.Perhapsitallbeganwhenthefrogdeveloped.Eventoday,ababyfrog,thetadpole,beginsasafish,havinggills(鳃),butthenbecomesafrogwithlungs.Thefrogevendevelopsfeetandhandssimilartooursinbonestructure.Agesagothefirstfroglaiddowntheplanofthekindoflimbs(肢)whichallbackbonedanimals,includinghumans,havebad,thoughsomeofthem,likethebird,donotkeepthiskindoffive-fingeredlimballtheirlives.Whenthefroghasgrownfromatadpoletoabackbonedanimalwithfourlimbs,breathingairbymeansoflungs,itisverylikecertainofthenextclassofbackbonedanimals--thereptiles.Thelargerreptileslivingonearthformanyyearagoweredinosaurs.Someofthesmalleronesgrewstretchesofskinbetweentheiroutspreadfingerstoformwings.Wedoknow,fromfossilized(化石的)remains,thatthefirstbirdswereflyingreptileswithsharpteeth.Whatastrangeworlditmusthavebeenduringthesetimes!59.Theauthorbelievesthatanimalswithoutbackbones________.A.hadnobrainsotheydidnotsurviveB.weredifficulttoclassifyC.havebeenimportantcreatures ` D.areeasilyplacedinorderofarrival60.Fromthearticlewecanknow________.A.animalshadabackbonebutnobrainB.insectscamefromwormsC.animalscamefrominsectsD.thetimeorderofspecies61.Accordingtothepassage,whichofthefollowingstatementsistrue?A.Thefirstbirddevelopedfromaflyingfish.B.Thehorsebelongstotheamphibianfamily.C.Thehandofafroghasfourfingersandathumb.D.Alltheanimalshavegotbackbonesinsidetheirbody.62.Whichofthefollowingwouldbethebesttitleforthepassage?A.HowBackbonedAnimalsEvolved B.HowtoClassifyAllLivingThingsC.TheLifeCycleofaFrog D.HowtheFirstBirdFlewCUntil1964mostformsofgamblingwereillegalintheUnitedStates.Sincethen,however,moreandmorestaleshavelegalizedgamblinginordertoraiseincome.TheU.S.gamblingindustryhasgonefromanattitudeof“prohibition〞tooneof“promotion〞,asallbutfivestateshavenowlegalizedgamblingasasolutiontotheirdepressedeconomies.MoststatesintheUnitedStatesnowdependonincomesfromstatelotteries(博彩)andusethemforgoodcauses,suchasimprovingpubliceducation,maintainingslateparks,anddevelopingenvironmentalprograms.Stategovernmentsmaintainthatthevoluntarycontributionoffundsthroughstatelotteriesispreferabletoincreasestatesalesorincometaxes,andtheresidentsofstatesusingthelotterysystemtendtosupportthis.Thegamingindustryhasalsobenefitedsomeofthenation'spoorestcitizens:NativeAmericans.TheU.S.governmentruledin1988thatslatescouldnottaxtherevenuesearnedbygamblingonNativeAmericanreservations.Havingtakenadvantageofthisrulinganopencasinos(赌场)ontheirreservations,manyNativeAmericansmovedfromalifeofpovertytoalifeofwealth.Althoughtherearemanyadvantagestolegalizedgambling,therehasalsobeenagooddealofcriticismofstate-supportedgambling.Asstatesincreasetheirsupportofstatelotteries,theyseemtoencouragecommercialgamblinginallitsforms.About50percentoftheU.S.populationplaysthelottery,accordingtoastudybytheUniversityofChicago.Thistrendhasledtoanincreaseinhabitualgambling.Morethan5millionAmericanssufferfromgamblingaddiction.Thosemostatriskofbecomingaddictedincludethepoor,youngpeoplebetweentwelveandeighteenyearsold,andwomenovertheageoffifty,whoarelookingforsomeentertainment.Asaresult,manyofthemwillendupinprisonorevenhomeless.Thepromiseofwinningbigfortunehascreatedbigproblems.Perhapsthemostimportantconcernisthemoralissueoflegalizedgambling.Thelotteryistheonlyformofgamblingthatisessentiallyagovernmentcontrol.Criticsaskwhethergamblingisaproperfunctionofgovernment.Shouldthegovernmentbethespokesmanfortheexpansionofgambling?Criticssaystateadvertisingoflottoemphasizesluckoverhardwork,instanthappinessovercarefulplanningandentertainmentoversavings.Thetraditionalworkethic(道德准那么)isbeingdevaluedbythepipedreamofstrikingitrich,andthisissendingconfusingmessagestoyoungpeople.In1996,CongresscreatedacommissiontoconductalegalstudyofthesocialandeconomicimpactsofgamblingintheUnitedStates.Aftertwoyearsofstudy,theCommissionrecommendedanendtotheexpansionoflegalizedgamblingandabanonInternetgambling.Somefeelthiswillseverelyhurtthegamblingindustry.Othersfearthatitisnotenoughandareaskingthegovernmenttotakeatoughstandagainstgambling.63.Accordingtothepassage,weknowthat ________.A.anyformsofgamblingwerebannedbefore1964intheUSAB.theeconomicalproblemsledtotheriseofgamblingindustryintheUSAC.allAmericanstaleshavelegalizedgamblingsince1964D.onlyfivestateshavenowlegalizedgamblingbecauseofthedepressedeconomies64.WhichofthefollowingisNOTmentionedinthepassage?A.Statelotterysystemhelpstoraisemoneytoimprovepeople'spublicwelfare.B.GamblingindustryhelpstochangetheAmericanwayoflife.C.GamblingindustryhelpstoimprovethelifeofsomepoorNativeAmericans.D.Statelotterysystemhelpstoincreasestatesalesorincometaxes.65.Whatistheauthormostconcernedabout?A.Theexpandingofthegamblingindustry.B.Thesufferingofthegambling-addictedpeople.C.Themoralproblemsbroughtaboutbythelegalizedgambling.D.ThedisadvantageofInternetgambling.66.InParagraph5,theword“pipedream"means_________.A.wonderfulideaB.creativeideaC.unworkableplanD.practicalplanSectionCDirections:Readthepassagecarefully.Fillineachblankwithapropersentencegiveninthebox.Eachsentencecanbeusedonlyonce.Notethattherearetwomoresentencesthanyouneed.A. WhenchildrentodayplayAngryBirds,theywon'twonderwhythebirdsaresoill-tempered.B. Hollywoodisactuallysuchapowerfeaturingitscreativity,imaginationandefficiencyin givingrisetoitsentertainmentproducts.C. Itledthewayforanumberofotherequallysilly,equallyaddictivegamestoinvadecell phoneseverywhere.D.Lego,byputtingforwardeducationsolutions,isnowstrivingtohelpkidstostanduptoa problemandsolveit.E. Nevermindthatthesegamesmadeabsolutelynosensefromanarrativeviewpoint.F.Initseffortstofeedtheaudience’scuriosity,Hollywoodmayinfactbekillingit.Afewyearsago,aFinnishapptookthemobilegamingworldbystorm.Itsset-upwassimpleanditsideaillogical:AngryBirdswaslittlemorethanashootinggame,withbirdsinsteadofbulletsandgreenpigsinplaceoftargets.67ShortlyafterAngryBirdstookoff,audiencesfoundanewdistractioninFruitNinja,agamewheretheobjectwastochopfallingproduce.ThentherewasCandyCrush,whereplayerscouldsaveacandykingdombymatchinglike-coloredbonbons.68Thatwastheircharm,afterall:Theywereknowinglyridiculousorillogical,anattackintomindlessamusement.IngameslikeAngryBirds,playersfoundanescapefromreality.Alltheyhadtodoisresignthemselvestothelogicofthegame,aworldofsimplecause-and-effect:Slingshotabird,killapig,scorepoints.Fastforwardto2023,andthere'snowanAngryBirdsmovie,heretofillyouinonallthedetailsyouneverwishedtoknow.Thebirdshavebeengivenpersonalities,motivesandback-stories,andsohavetheevilgreenpigs.Meanwhile,thegame'snonsensehadtobemadesenseofduetoanecessaryplotforamovie.Logicreplacedillogic.AngryBirdsisnotaloneinhavingitsgrayareassketchedinforthebigscreen.Hollywoodhasmadeanindustryofansweringthequestionsnooneeverthoughttoask;tothepointofevengivingabrandoftoyblocksitsownstoryin2023’sTheLegoMovie.Countlesssecondarycharactershavealsobeenpulledfromthesidelinesandgiventheirownopportunitiestoshowonthescreen.ThatincludestheforgetfulbluefishDoryfrom2023’sFindingNemo.69Viewersnolongerhavetheluxuryofimaginingback-storiesfortheirfavoritecharacters,ordebatingtheopen-endedquestionsinafilm’ssourcematerials:Anendlessflowofprequels(前传),sequels(续传)andspin-offs(衍生产品)fillinthoseblanksforthem.70They'llknow.Everythingwillbedeterminedforthem:Accordingtothemovie,themainbirdRedgetspickedonforhisbushyeyebrows,andthatleaveshimfeelingisolatedand,well,angry.Insomeways,Hollywoodhastakenontheroleoffanfictionwriters,byexpandingandexploringeverycornerofitsfictionaluniverses.Butwhentheseuniversesexpandtoowidely,whatwillbelefttoimagine?IV. SummaryWritingDirections:Readthefollowingpassage.Summarizethemainideaandthemainpoint(s)ofthepassageinnomorethan60words.Useyourownwordsasfaraspossible.Arewebornwithapreferenceforcertainkindsoffaces?Orisitjustsomethingthatpeoplelearn,withoutrealizingit?Tofindout,psychologistJudithLangloisandherteamattheUniversityofTexasinAustinworkedwithyoungchildrenandbabies. Theresearchersshowedeachbabyphotosoftwofaces.Onefacewasmoreattractivethantheother.Thescientiststhenrecordedhowlongtheinfantslookedateachface. Babiesspentlongerviewingtheattractivefacesthantheunattractiveones.Thatmeanttheypreferredtheprettyfaces.Thesefindingssuggestthatpeoplepreferprettyfacesveryearlyinlife.However,it’sstillpossiblethatwelearnthatpreference.Afterall,Schein,whoworkedwithJudith,pointsout,“Bythetimewetestinfants,theyalreadyhaveexperiencewithfaces.〞 Thatexperiencecanmakeadifference.ResearchconductedattheUniversityofDelawarefoundthatbabies’brainsarebetteratprocessingfacesfromtheirownrace.Soinfantsquicklycometopreferthesefaces,Scheinsays. It’swell-knowninpsychologythatfamiliarthingsaremoreattractive,saysCorenApicella.SheisapsychologistattheUniversityofPennsylvaniainPhiladelphia.“Perhapsaveragefacesaremoreattractivebecausetheyseemmorefamiliar.〞 Indeed,herresearchbacksthisup.ApicellaandLittleworkedwithtwogroupsofyoungadults:BritishandHadza.TheHadzaarehunter-gatherersinTanzania,anationinEastAfri