2024屆廣東省廣州市彭加木紀(jì)念中學(xué)高考英語一模試卷含解析

2024屆廣東省廣州市彭加木紀(jì)念中學(xué)高考英語一模試卷注意事項1．考生要認(rèn)真填寫考場號和座位序號。2．試題所有答案必須填涂或書寫在答題卡上，在試卷上作答無效。第一部分必須用2B鉛筆作答；第二部分必須用黑色字跡的簽字筆作答。3．考試結(jié)束后，考生須將試卷和答題卡放在桌面上，待監(jiān)考員收回。第一部分（共20小題，每小題1.5分，滿分30分）1．Atthattime,mymindwasacomplete_______;Icouldn'tthinkofasingleanswer.A．blank B．bonusC．blow D．bottom2．Thenewsofthenewly-electedpresident’scomingtoChinaforavisitwas______ontheradiojustnow.A．givenaway B．givenin C．givenoff D．givenout3．Policehavefound________appearstobethelostancientstatue.A．which B．where C．how D．what4．—Whatdidyousayyouwerereluctanttoriskjustnow?—_________tohighlevelsofradiation.A．Beingexposed B．HavingbeenexposedC．Tobeexposed D．Exposed5．Goodfood，goodsleep，noexercise．That'shegainedweight．A．howB．whenC．whatD．whether6．—Ithinkthepaperistakingyoualongtimetowrite.—I______onitforalmostamonthnow.A．workedB．wasworkingC．a(chǎn)mworkingD．havebeenworking7．Theeducationalreformisnowunderwaythroughoutthecountry,________thestudentsmoreopportunitiestodeveloptotheirgreatestpotential.A．tograntB．havinggrantedC．grantingD．granted8．Thisisaveryinterestingbook.I’llbuyit，________.A．howmuchmayitcost B．nomatterhowitmaycostC．howevermuchitmaycost D．whatevermayitcost9．______muchpressuretheU.S.governmentputontheChinesegovernment,Chinawouldsticktoitsownpolicyofexchangerate.A．However B．Wherever C．Whatever D．Whoever10．----Whathappenedtotheyoungtreesweplantedlastweek？---Thetrees_____________well，butIdidn'twaterthem.A．mightgrow B．needn'thavegrownC．wouldgrow D．wouldhavegrown11．---I’msureAndrewwillwinthefirstprizeinthefinal.---Ithinkso.He_____foritmonths.A．ispreparing B．hasbeenpreparing C．waspreparing D．hadbeenpreparing12．Yet_______intheprocessofdevelopmentdidtheystoptoconsidertheimpactoftheir“progress”onnature.A．innotimeB．a(chǎn)tnopointC．a(chǎn)slikelyasnotD．moreoftenthannot13．—Let’shaveagameoftennis;theloserhastotreattheothertoanice-cream.—________.A．I’mafraidsoB．It’sadealC．You’vegotapointD．Isupposenot14．AfirmfromNewZealandhasrevealedasetofroboticlegswhichtheyclaimwillsoonallow________wheelchair-boundpeopletowalkagain.A．extremely B．previously C．a(chǎn)ctually D．eventually15．Policementhinkthatwherethereisviolence,drugswithdamagingeffectsonkidsarealways______it．A．beyond B．before C．behind D．besides16．Thewriterwasso________inherworkthatshedidn’tnoticehimentertheroom.A．a(chǎn)bandoned B．focused C．a(chǎn)bsorbed D．centered17．Intimewereachedastagewehadmoreyoungreadersthanoldones． A．where B．how C．who D．what18．Ihadhardlyrungthebell________thedoorwasopenedsuddenly,andmysonrushedouttogreetme.A．beforeB．untilC．a(chǎn)sD．since19．Asa(n)________andeffectivemethod,expresswaynoisebarrierisaprimarymeasureusedtoreducetrafficnoise.A．correctional B．flexible C．economical D．investigative20．-Lateagain！Where_____________？-Sorry，I________________intheheavytraffic，orIwouldhavebeenhereearlier.A．wereyou；havegotstuck B．haveyoubeen；havegotstuckC．wereyou；gotstuck D．haveyoubeen；gotstuck第二部分閱讀理解（滿分40分）閱讀下列短文，從每題所給的A、B、C、D四個選項中，選出最佳選項。21．（6分）TheArcticisnotasafeplacetobebyanystretchoftheimagination.Essentiallyavast,floatingblockofice,withonlyasmallareaofland,thelandscapecanbealmosttotallydifferentfromyeartoyear.Eventhemostexperiencedexplorersareluckytoreturnwithalltheirfingersandtoes,nottomentiontheirlives.IntothisextremeenvironmentsteppedNabilAlBusaidi.Infact,hedidn’tjuststep—hesteppedandskiedhiswayacross650km,pulling50kgofequipment.HealsocarriedtheflagoftheSultanateofOman,whichheheldintheairattheNorthPole,becomingthefirstArabtoachievethisimpressivefeat(壯舉).OnthewaytotheNorthPole,Nabilwasdrivenbytherewardofsuccessandthepainatthethoughtoffailure.“Throughthe20-whateverdays,everyminutetherewasadifferentthingthatkeptmegoing,eitherthefearoffailure,thefearofdyingortherewardoffinishingandgettingsomewherewarm.”Theever-presentcold,averagingaround-40℃butdroppingaslowasarecorded-81℃,ishisoverriding(首要的)memoryoftheexperience.AsanOmani,Nabilhadanadditional20℃dropintemperaturetogetusedto,comparedtohisBritishteammates.Apartfromtheextremecold,polarbearswereacommonfeatureofthejourney,andNabilandtheteamhadtheirfairshareofbearencounters.“Polarbearsaredangerous,buttheyarenotthatthreateningbecausetheydon’tintendtoharmhumans.They’reusuallyeithercuriousorjustdon’tcare.Wesawfivebears,andnonewereaggressive,”saidNabil.OnefinalproblemNabilfacedwasthestressputonteamrelationsbytheseverityoftheconditions,especiallyduringthefirstthreestagesofthejourney.However,duringthefourthandfinalleg,theteamworkedsowelltogetherthattheytravelled130kminonlytwoandahalfdays.1、WhatdoesParagraph1show?A．Nabil’shard-wonsuccess. B．ThevalueofArcticexploration.C．Nabil’sgoodluck. D．ThechangeoftheArctic.2、WhichistheproblemNabilfacedonhisjourney?A．Graduallyrisingsealevel. B．Frequentpolarbearattacks.C．Constantlychangingclimate. D．Theheavypsychologicalburden.3、WhatcanweknowaboutNabil?A．HehadgoneonanArcticjourneybefore.B．HeexploredtheArcticwithprettylightpacks.C．HefinishedtheexplorationoftheArcticallalone.D．Hesufferedmorefromextremecoldthanhisteammates.4、Whatisthepassagemainlyabout?A．LifeintheArctic.B．ClimateoftheArctic.C．ThefirstArabtostepintotheArctic.D．AchievementsscientistsmadeintheArctic.22．（8分）Therewasalotofnewsrelatedtoartificialintelligence,orAI,andmachinelearning.Amongthestoriesweretwodealingwithdirectcompetitionsbetweenhumansandmachines.Inonecompetition,machinesthatusedAIperformedbetterthanhumanbeingsinahigh-levelreadingtest.Twonaturallanguageprocessingtoolsbeathumanintheexperiment.OneofthetoolswasbuiltbytheAmericantechnologycompanyMicrosoft.TheotherwascreatedbyChineseonlinesellerAlibabaGroup.Inanothercompetition,acomputertookonhumansinlive,publicdebates.TheeventdemonstratedhowAI-poweredcomputersareincreasinglybeingdevelopedtothink'andsoundlikehumans.Theorganizerofthedebates,U.S.technologycompanyIBM,announcedsplitresults.Itsaidamajorityofthosewatchingsaidtheyfeltthemachinehaddonemoretoimprovetheirknowledgeofthesubject.But,thehumangotmorepraiseforcommunicatingtheirideas.Thisyear,wealsoexploredthemanywaysAIandmachinelearningarenowbeingused.Forexample,someU.S.judgesusemachinelearningsystemstohelpthemdecidewhen,andforhowlong,criminalsshouldbejailed.Thesystemusescomputerstoexaminedatafromthousandsofcourtcases.Onefast-growingareaofAIisfacialrecognition,whichisincreasinglybeingusedforsecuritypurposes.Recently,Atlanta'sHartsfield-JacksonairportbecamethefirstintheU.s.topermitpassengerstousefacialrecognitiontechnologytogetonflights.AChinesecompanyshowedoffanAIsystemitdevelopedtorecognizeindividualsbybodyshapeandwalkingmovements.ThesystemisalreadybeingusedbyChinesepoliceinBeijingandShanghai.Inaddition,machinelearningwasusedduring2018topredictresultsoftheWorldCupsoccercompetition.Thetechnologyalsocreatedartworkthatsoldforalargeamountofmoney.Anditisbeingusedtohelpfarmersavetimeandmoney,whilereducingenvironment-harmingchemicals.Othertechnologysystemsarebeingusedtofollowfarmanimalsandwildlifetocollectinformationontheiractivities.1、Whywerethetwocompetitionsmentionedinthepassage?A．ToshowhowmuchbetterAIandmachinelearningarethanhumans.B．ToproveAIandmachineLearninggotmorepraiseforcommunication.C．ToshowhowpowerfulAIandmachineLearningare.D．ToproveAIandmachinelearninghavebeenusedintheworkofU.S.judges.2、Whatarefacialandbodyrecognitionsystemsusedforinthepassage?A．Knowledgelearning.B．Safetycontrol.C．Officeautomation.D．Trackingsurvey.3、Whatcanweinferfromthispassage?A．AIhasbeenwidelyusedineveryperson'sdailylife.B．HumancanbereplacedbyAIinfuturecompletely.C．MoreattentionisbeingpaidtoAIineverypartoftheworld.D．MoreadvancedAlishelpingpeopleinmoreandmoreareas.4、Whereisthetextprobablyfrom?A．Atechnologyreport.B．Anaturalsciencemagazine.C．Asciencefiction.D．Agovernmentdocument.23．（8分）AcompanyinSanFrancisco,California,hasfoundawaytoturnusedplasticbottlesintowomen’sshoes.Everyday,millionsofAmericansdrinkwaterandotherliquidsfromplasticbottles.Morethan60millionofthemarethrownawayeachday.Manyoftheplasticbottlesendupinlandfillsorareburnedwithotherwasteproducts.ASanFranciscostart-upcompanycalledRothy's,however,turnsthisplasticwasteintoenvironmentallyfriendlyshoes.RothMartinisthecompany’sco-founder.Heexplainshowiheyturnplasticintosoftmaterialforwomen’sfeet.Theytaketheplastic,cleanit,andbreakitdownintosmallpieces.Thentheypressthemthroughadevicethatmakessoftfibers.Thosefibersarcthencombinedtogether.Thisisdonebya3Dmachine.Itisdesignedtoreducewastewhilemakingtheshoes.Theknittedstuffandtheinnerpartoftheshoearcthenattachedtotheshoe’souterpart,calledthesole(鞋底).Thisoutersoleisalsomadefromenvironmentallyfriendlymaterial:responsiblysourcedno-carbonrubber.Rolhy’sshoesaresoldonline.Theyareflatshoes,witheitheraroundedorpointedtoe.Theycomeindifferentcolorsanddesigns.Theycosteither$125or$145perpair,dependingonthedesign.AfterAmericanactressGwynethPaltrowdiscoveredthemlastyear,thedemandfortheshoesgrew.Martinsaysthereisnoshortageofmaterialtofillthatdemand.“We’renotgoingtorunoutofwaterbottlesanytimesoon.Sowehavealimitlesssupplyofmaterial,andIthinkthatisagoodsignforourfuture."Whentheenvironmentallyfriendlyshoeswearout,customerscanreturnthematnocosttoacompanythatusestherecycledmaterialtomakeotherproducts.Fornow,theshoesareonlyavailabletobeshippedintheUnitedStates.However,thecompanysaysitwilladdinternationalshippinginthenearfuture.1、Howareusedplasticbottlesusuallydealtwith?A．Theyareusedtomakeshoes.B．Theyareburiedorburned.C．Theyarechangedintosoftmaterials.D．Theyarereturnedtofactoriesforreuse.2、Whatdoestheunderlinedword“knitted”inthethirdparagraphmean?A．Combined. B．Fixed.C．Spotted. D．Repaired.3、WhichofthefollowingdirectlyhelpedtoincreasethesalesofRothy’sshoes?A．Thedesignandcolor.B．Thereasonableprice.C．ThestarpowerofGwynethPaltrow.D．Thecompany'sadvertisement.4、Whatisthepurposeofthetext?A．Toadvertiseanewkindofshoes.B．Todescribetheprocessofmakingshoes.C．Tointroduceanewwayofrecyclingplasticwaste.D．Tostresstheimportanceofenvironmentalprotection.24．（8分）MadameMarieCuriefamouslywontwoNobelPrizes,butmanyotherwomenhavealsobeenawardedtheprize,too.Herearetheirstories.SelmaLagerlofSelmaLagerlofwasaSwedishauthorandteacher.Shepublishedherfirstnovel,GostaBerling’sSaga,attheageof33.ShewasthefirstfemalewritertowintheNobelPrizeinLiteraturewhichshewasawardedin1909.Additionally,shewasthefirstfemaletobegrantedmembershipintheSwedishAcademy.GertyTheresaCoriGertyandherhusband,CarlCori,metinPragueandlivedinAustriabeforeimmigratingtotheUnitedStatesin1922,wherethetwomedicaldoctorsworkedtogetheratRoswellParkComprehensiveCancerCenterinNewYork.In1947,GertyandCarlwereawardedtheNobelPrizeinPhysiologyorMedicine,makingGertyCorithefirstwomantoholdthehonor.MariaGoeppert-MayerIn1942,MariaGoeppert-MayerjoinedtheManhattanProject.Fromthere,shemovedontoLosAlamosNationalLaboratory,thentoArgonneNationalLaboratory,whereGoeppert-Mayerdevelopedthenuclearshellmodel.Forthis,shesharedthe1963NobelPrizeinPhysicswithJ.HansD．JensenandEugenePaulWigner.DorothyCrowfootHodgkinDorothyHodgkin’smotherencouragedherloveofscienceasachild,andatage18,shebeganstudyingchemistryatawomen-onlyOxfordcollege.HerworkonmappingvitaminB12earnedhertheNobelPrizeinChemistryin1964.1、WhatisSelmaLagerlofnotedforinhistory?A．Herbooks. B．Hermedicine.C．Herpoliticalworks. D．Herteachingskills.2、WhowasthefirstwomantowintheNobelPrizeinPhysiologyorMedicine?A．SelmaLagerlof B．GertyTheresaCori.C．MariaGoeppert-Mayer D．DorothyGrowfootHodgkin3、WhendidDorothyGrowfootHodgkinwinhertheNobelPrizeinChemistry?A．In1922. B．In1942.C．In1963. D．In1964.25．（10分）ASafePersonalAlarmMOSTEFFECTIVEDEFENSELoud:125dBear-piercing(刺耳的)panicalarmthatscaresawayattackersProventobemoreeffectivethanpeppersprayasadefensetoolAlsocommonlyusedbyseniorstocallforhelpincaseoffallingSUPEREASYTOUSESimplypullthepin,andthisear-piercingalarmwillworkforuptoahalfhourofcontinuoussoundPlugthepinbackintostopthealarm．(Canbere-usedoverandoveragain)Easilyattachestokeys,purses,backpacksorbeltsWHATPEOPLEARESAYING“Extremelypleasedwithmypersonalalarmsystem．Ifeelmuchsaferinmyeverydaylifehavingitinmypocketorhandbag．Afriendrecentlyhadanunsettlingexperienceinanoutdoorparkinglotofagrocerystore,soIorderedthisproductforher．Shewasdelightedtoreceiveitandtohavetheaddedprotectionandpeaceofminditoffers.”—JillianThompsonfromChicago,IL“OhmyWORD!ThisisSOloud!It’sperfecttocallattentiontoanunwantedsituationortocallattentiontoanythingwhereyoumayneedassistance．Igotmyselfoneandoneforeachofmykids．ThepinreleaseseasilyBUTitdoesn’tseemtojustfallouteithersoyoucancarrywitheaseandwon’thavetoworryaboutsettingitoff．Butifyoudo,it’seasytoslipitrightbackin．Haha!Alittlepullwillgiveyouarealgoodideawhatit’scapableof,Ipromise.”—AngelaKelleyfromPaloAlto,CA“Boughtthreefortheyoungwomeninourfamily．TheywereallveryhappywiththeeaseofuseandhowLOUDitis．Woulddefinitelybuyagain.”—BillyPerkinsfromIndianapolis,INAreyoureadytoprotectyourselfandyourlovedonesfromthebadguys?1、Howdoesthesafepersonalalarmwork?A．Loudandcontinuousnoisegiveswarningorcallsforhelpwhensomeoneisindanger．B．Itcanbeusedasasharpknifetodriveawayattackersandeffectivelyprotectitsuser．C．Intimesofdanger,itcangooffautomaticallyandlastuntilassistanceissuccessfullygiven．D．Apullcanhelpitsusertoavoidanunwantedsituationorwarnitsuserofpossibledanger．2、Thesafepersonalalarmisparticularlyusefulfor．A．someonewhoislookingforagiftforhisfamilyB．a(chǎn)studentwhohastroublewakingupforschoolC．kids,ladies,orseniorsintimeoftroubleD．a(chǎn)nyonewhohasadeeploveforhisfamily3、“WHATPEOPLEARESAYING”isattachedheremainlyto．A．explaintheuseoftheproductB．promotetheadvertisedproductC．showgreatthankstotheproducerD．shareexperiencewithreaders第三部分語言知識運(yùn)用（共兩節(jié)）第一節(jié)（每小題1.5分，滿分30分）閱讀下面短文，從短文后各題所給的A、B、C和D四個選項中，選出可以填入空白處的最佳選項．26．（30分）完形填空Teachingsecondgradeisalwaysachallenge．Eachstudentarrivesatschoolwithhisownneedsanddifficulties．OneyearastudentcalledBilly1mewithhisbehavioraswellashisacademicrequirements．Hestruggleddailywithhis2emotionsandoftenbecameangryorviolent．Iknewthat，tomake3progress，hisemotionsneededcontrolling．One4ItriedtohelpBillywastohavehimcomedirectlyintotheclassroomwhenhearrivedatschool．Billy’smomwould5metoalert(警告)metoaparticularlyemotionalmorningathome．Then，Iwouldfocuson6hisangerandcalminghimdownbeforetheotherstudentsarrived.Oneweekourclasswasstudying7．IthoughtonewaytobringlearningintotheclassroomwastobringmydogRockytoschoolfortheday.Thatdaybeganasnormal．Iwaspreparingactivitiesfocusedondogthemes8.IwastoldthatBillyhada9morningathomeandImightneedtogethim10．AsIwastalkingtohismom，Billy11intotheclassroom．ToBilly’s12，Rockyimmediatelyranuptohisnew13，wagginghistailandlickingBilly’sfacewithdoggyaffection．Billycouldn’t14Rocky’scharm(魅力)andbeganlaughingashisangermeltedaway．Throughouttheday，BillyneverleftRocky’sside，feedinghim，beinggentlewithhimandeven15theotherstudentswhileRockywassleeping．Billywasknownfordoinganythinghecouldtoavoid16，butonthisdayhefoundagooddogstory，“Clifford’sPuppyDays，”andreadittoRocky．How17.IwasatthesightofBillyreadinghappily！Mylittledogwasableto18Billy’sdayfromoneofangerandfrustrationtooneoflaughter，gentlenessand19.ThatdayRockymorethanhelpedmewithmy20；hehelpedtochangethelifeofachild!AfterthatBilly’sbehaviordefinitelyimproved.1、A．challengedB．cheatedC．benefitedD．betrayed2、A．unforgettableB．uncontrollableC．unconsciousD．unfortunate3、A．physicalB．mentalC．a(chǎn)cademicD．a(chǎn)uthentic4、A．a(chǎn)dvantageB．a(chǎn)gendaC．reasonD．way5、A．a(chǎn)wakeB．callC．visitD．sign6、A．toleratingB．observingC．relievingD．ignoring7、A．emotionsB．petsC．botanyD．diet8、A．a(chǎn)fterB．a(chǎn)sC．whenD．before9、A．boringB．fantasticC．busyD．rough10、A．settledB．punishedC．treatedD．excited11、A．fledB．stormedC．joggedD．floated12、A．surpriseB．delightC．shameD．fear13、A．protectorB．trainerC．friendD．owner14、A．resistB．describeC．reduceD．forget15、A．educatingB．envyingC．comfortingD．quieting16、A．explodingB．readingC．a(chǎn)rguingD．a(chǎn)pologizing17、A．surprisedB．disappointedC．a(chǎn)musedD．confused18、A．urgeB．shortenC．transformD．expand19、A．a(chǎn)dmirationB．curiosityC．a(chǎn)nxietyD．love20、A．familyB．teachingC．houseworkD．performance第二節(jié)（每小題1.5分，滿分15分）閱讀下面材料，在空白處填入1個適當(dāng)?shù)膯卧~或括號內(nèi)單詞的正確形式。27．（15分）語法填空SeveraldaysbeforeJuly28，1976，manystrangethingshappenedinTangshan．Wellwalls1．（crack），waterpipesbrokeand2．（burst），andanimalsweretoonervoustoeat．Theywere3．（sign）fortheearthquake．ButpeopleinthecityofTangshanthoughtlittle4．these．At3：42am．thatday，theearthbegantoshake，which5．（destroy）thecity．Laterthatafternoon，anotherbigearthquakeshookTangshan．Morepeoplewerekilledor6．（injure）andmorebuildings7．（fall）down．Thewholecitylayin8．（ruin）．Soldiersweresenttohelptherescueworkers．Teamswereorganizedtodigoutthose9．weretrappedandburythedead．Thecitybeganto10．（breath）again．第四部分寫作（共兩節(jié)）第一節(jié)短文改錯（滿分10分）28．（10分）假如英語課上老師要求同桌之間交換修改作文，請你修改你同桌的以下作文，文中共有10

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不計分。DearMsSmith,IamLiHua、Iamwritingtoaskaseveral-hourleave、IwastogiveaspeechtowelcomeagroupofAmericanvisitingteachersonWednesdaymorning、IamterriblesorrytotellyouthatIcan’tcometoattendatyourclass、Howapity!PerspectivesonAmericanLiteraturearealwaysmyfavouritecourse、Idohopeyoucanexcusemyabsence、Astothelessonstobemissing,IwonderifitispossibleforthemtoberecordedsothatIcanlistentoitlater、OrIwilljustreadmyclassmate’snotesandmakingthemupassoonaspossible、Yourpermitwillbeappreciated、Thanksalot!Yours,LiHua第二節(jié)書面表達(dá)（滿分25分）29．（25分）假定你是李華，得知你的英國朋友Frank暑假不回國，你寫信想邀請他到你清遠(yuǎn)的家鄉(xiāng)玩。內(nèi)容包括：1.發(fā)出邀請2.時間和地點3.活動安排注意:1.詞數(shù)100左右，開頭和結(jié)尾已經(jīng)出，不計人總詞數(shù);2.可適當(dāng)增加細(xì)節(jié)，以使行文連貫DearFrank,Havingheardthatyouwon'treturntoyourcountrythissummervacation,______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

參考答案第一部分（共20小題，每小題1.5分，滿分30分）1、A2、D3、D4、A5、A6、D7、C8、C9、A10、D11、B12、B13、B14、B15、C16、C17、A18、A19、C20、D第二部分閱讀理解（滿分40分）閱讀下列短文，從每題所給的A、B、C、D四個選項中，選出最佳選項。21、ThreeyearsagoJennySalgado,aDominicanshopassistant,movedtoHighlandtown,aneighborhoodofBaltimore.WhenshearrivedtheshopsheworksinwasoneofonlyafewSpanishbusinesses.Nowtherearemanymore.“It’sgoodnowifyouspeakSpanish,”shesmiles.Baltimorehasbeenlosingpeoplefor60years.Toaddressthis,itsformermayor,StephanieRawlings-Blake,wantedtomakeitthemostimmigrant-friendlycityintheworld.ItslibrariesprovideSpanish-languageexerciseclasses.Tohelpthosewithnopapers,thecityisintroducingmicro-loans(小額貸款）whichrequirenocreditchecks.Citypolicewouldnolongerroutinelychecktheimmigrationstatusofcitizensorenforceanyfederalimmigrationlawunlessrequiredto.Thethengovernor,MartinO'Malleymadeitpossibleforillegalimmigrantstogetdrivinglicenses.Suchwelcomingpoliciesarespreading.SuchcitiesasCleveland,DaytonandPhiladelphiaalleagerlytrytopleaseimmigrants.RickSnyder,GovernorofMichigan,hasaskedthefederalgovernmenttooffer50,000visastopeoplewhoagreetoliveinDetroit.Hisadministrationhasmadeiteasierforskilledmigrantstogetprofessionallicenses.Whenacity’spopulationfalls,bothtaxreceiptsandservicesfall.Half-desertedneighborhoodsbreed(滋生）crime,drivingyetmorepeopletoleave.Nocityhasescapedthiswithoutattractingnewresidents,saysSteveTobocmanofGlobalDetroit.Severalstudiessuggestthatwhenimmigrantsarrive,crimegoesdown,schoolsimproveandshopsopenup.InDetroit,immigrantslivingnearthetinyseparatecityofHamtramckhaveformedlocalwatchestoguardagainstthieves.Theirneighborhoodsarenotjustsafer;