2025年高考英語考點(diǎn)過考點(diǎn)43閱讀理解詞義猜測題

考點(diǎn)43閱讀理解詞義猜測題高考頻度：★★★★★歷年來高考試題中的生詞量有增無減?！督虒W(xué)大綱》要求學(xué)生“讀懂生詞率不超過3%的傳記、故事、記敘文、科普小品文和有關(guān)社會文史知識等不同題材的材料。”在英語閱讀訓(xùn)練和測試中的生詞障礙往往會成為學(xué)生理解的“絆腳石”，這些“絆腳石”的出現(xiàn)大致分五類：1．舊詞新義，考查詞匯表中未出現(xiàn)的詞義；如：NearbyistheIndianapolisracecourse,wherethenation’smostfamouscarraceisheldeachyearonMay30th.我們學(xué)過course的意思是“過程，課程”等，在此顯然不符句意。根據(jù)上下文course是汽車賽舉行的地方，可推斷course在該句是“車道”或“跑道”的意思。2．合成詞、轉(zhuǎn)化詞與派生詞，如shoplifting，heartbroken，puterliterate，decisionthinking，imperfect等；3．“靈活”的常用詞增多，這些詞必須根據(jù)具體的上下文語境才能正確理解；4．“新鮮”的外國人名、地名、專有名稱增多，這些詞有些帶有一定的文化背景5．超綱生詞。有的學(xué)生在閱讀訓(xùn)練和測試中存在著“生詞恐懼心理”，一遇到生詞就有讀不下去的感覺。那么閱讀理解時遇到大量生詞該怎么辦?查詞典當(dāng)然是排除詞義障礙的一種方法，當(dāng)然這只有在平常的閱讀訓(xùn)練中才可以使用。但是，頻繁的查閱詞典既影響閱讀速度，又容易破壞學(xué)生閱讀的思路和興趣。況且，一詞多義是英語詞匯的主要特點(diǎn)，詞典不一定能為學(xué)生提供單詞在特定的上下文中的具體或確切的含義。平時的練習(xí)中遇到生詞不要馬上查詞典，可以通過一定的方法來猜測理解。猜測詞義不僅是一項(xiàng)閱讀技巧，也是高考閱讀能力考查的一個方面，每年在高考閱讀中都有猜測詞義的試題。掌握正確方法快速而又準(zhǔn)確地猜測出生詞的含義，對提高閱讀速度和答題效率相當(dāng)重要。該類題常見的考查形式有：1.Thephrase“…”inthesentencecouldbereplacedby____.2.Theword“…”intheparagraphrefersto____.3.Whatisthemeaningoftheunderlinedwordintheparagraph?/Whatdoestheunlinedwordmean?4.Whichofthefollowingistheclosestinmeaningtothephrase“…”?5.Theword“…”mostnearlymeans____.對此類試題，考生應(yīng)該進(jìn)行大膽猜測，但這種猜測不是胡亂的，盲目的，而是有一定的方法和技巧。下面介紹幾種常見的猜測詞義的方法供同學(xué)們加以運(yùn)用。1．構(gòu)詞法猜詞閱讀中常常會遇到一些由熟悉的單詞派生或合成的新詞。掌握構(gòu)詞法對猜測詞義很有幫助。如：unforeseeable.這個詞，可以根據(jù)構(gòu)詞法把它拆成un,fore,see,able；其中see是詞根，fore是“先，前，預(yù)”的含義，un是否定，able是“能……的，可……的”，因此unforeseeable是“未能預(yù)見到的”意思。學(xué)*科網(wǎng)…Bakerconcludesthatpeopledonothavetheabilitytosensewhenthey’rebeingstaredat.Ifpeopledoubttheouteofhistwoexperiments,saidBaker,“Isuggesttheyrepeattheexperimentsandseeforthemselves.”…70.Theunderlinedword“oute”inthelastparagraphmostprobablymeans.A.value B.resultC.performance D.connection【答案】B2．利用同義近義詞猜詞在生詞所出現(xiàn)的上下文中，有時會出現(xiàn)與之同義或近義的詞語或結(jié)構(gòu)，這時可從熟悉的詞語中推知生詞的含義。統(tǒng)稱在詞或短語之間有并列連詞and或or，這些詞語或短語在句中作相同的成分，并且and或or連接的兩項(xiàng)內(nèi)容在含義上是接近的或遞進(jìn)的，由此確定同等關(guān)系中的某個生詞所屬的義域，甚至推出它的大致詞義。…Fermat’sLastTheorem（定理）,firstputforwardbytheFrenchmathematicianPierredeFermatintheseventeenthcentury,thetheoremhadbaffledandbeatenthefinestmathematicalminds,includingaFrenchwomanscientistswhomadeamajoradvanceinworkingouttheproblem,andwhohadtodresslikeamaninordertobeabletostudyattheEcolePolytechnique.…65.Whichofthefollowingbestexplainsthemeaningoftheword“baffle”asitisusedinthetext?A.Toencouragepeopletoraisequestions.B.Tocausedifficultyinunderstanding.C.Toprovideapersonwithanexplanation.D.Tolimitpeople’simagination.【答案】B3．利用反義詞猜詞對比是描述，說明事物的常用方式。在對比中，對比的事物是互為相反的，因此根據(jù)反義或?qū)Ρ汝P(guān)系可從已知推出未知。利用反義詞來說明生詞的意義，如反義詞hotandcold,perfectandimperfect，甚至前、后句為肯定與否定或是與不是等，在句內(nèi)詞與詞之間，在段內(nèi)句與句之間的關(guān)系上起著互為線索的作用?！瑼child’sbirthdaypartydoesn’thavetobeahassle;itcanbeabasketoffun,accordingtoBethAnaclerio,anEvastonmotheroftwo,ages4and18months.…74.Whatdoestheunderlinedword“hassle”probablymean?A.Apartydesignedbyspecialists.B.Aplanrequiringcarefulthought.C.Asituationcausingdifficultyortrouble.D.Ademandmadebyguests.【答案】C【解析】根據(jù)前句的否定doesn’t與后句的肯定canbe這一對比關(guān)系，可以判斷出，為了慶祝孩子的生日，又不至于麻煩，可以買一個生日開心包。Hassle的意思應(yīng)該與fun相反，而與difficulty,trouble相近。答案為C。4．利用上下文語境猜詞任何一篇文章中的句子在內(nèi)容上都不是絕對孤立的，都跟句子所在的段落及整整篇文章有關(guān)。利用上下文提供的情景和線索，進(jìn)行合乎邏輯的綜合分析進(jìn)而推測詞義，是閱讀過程中的一大關(guān)鍵，這也是近年來高考考查的熱點(diǎn)。（2018·新課標(biāo)卷III）Adultsunderstandwhatitfeelsliketobefloodedwithobjects.Whydoweoftenassumethatmoreismorewhenitestokidsandtheirbelongings?ThegoodnewsisthatIcanhelpmyownkidslearnearlierthanIdidhowtolivemorewithless.Ifoundthepreholidaysagoodtimetoencourageyoungchildrentodonatelessusedthings,anditworked.Becauseofourefforts,ourdaughterGeorgiadiddecidetodonatealargebagoftoystoalittlegirlwhosemotherwasunabletopayforherholidayduetoillness.Shechosetosellafewlargerobjectsthatwerelessoftenusedwhenwepromisedtoputthemoneyintoherschoolfund(基金）(ourkindergartendaughterisseriousaboutbeingadoctor).……【文章大意】這是一片夾敘夾議文。文章講述作者引導(dǎo)孩子主動捐獻(xiàn)玩具，并從玩耍簡單玩具中獲得快樂的做法?！敬鸢浮緼5．利用定義和解釋猜詞有些文章，特別是科技文章，通常會對一些關(guān)鍵詞給予定義，我們可以利用定義來猜測這些詞的意思。釋義法就是根據(jù)文章中的字里行間，對生詞以定語（從句）、表語甚至用逗號、破折號等標(biāo)點(diǎn)符號引出并加以解釋說明的方式。“Organicproduceisalwaysbetter,”Goldsaid.“Thefoodisfreeofpesticides(農(nóng)藥),andyouaregenerallysupportingfamilyfarmsinsteadoflargefarms.Andmoreoftenthannotitislocally(本地)grownandseasonal,soitismoretasty.”Goldisoneofagrowingnumberofshoppersbuyingintotheorganictrend,andsupermarketsacrossBritainarecountingonmorelikehimastheygrowtheirorganicfoodbusiness.62.Whatisthemeaningof“theorganictrend”asthewordsareusedinthetext?A.Growinginterestinorganicfood.B.Betterqualityoforganicfood.C.Risingmarketfororganicfood.D.Higherpricesoforganicfood.【答案】A【解析】由Goldisoneofagrowingnumberofshoppersbuyingsomething可以推斷出，越來越多的顧客像Gold一樣開始購買有機(jī)食物，其實(shí)也就是對這類食物產(chǎn)生了越來越濃厚的興趣。答案為A。6．根據(jù)語義轉(zhuǎn)折猜詞有時文章的作者為了增強(qiáng)表達(dá)效果，會用一些含有表示意思轉(zhuǎn)折的連詞，副詞或短語。如：though,although,still,but,yet,instead,insteadof,however,while,onthecontrary,ontheotherhand,unlike,ratherthan,foronething,foranother等，我們可以根據(jù)轉(zhuǎn)折意思猜測詞義?！璈oweverobviousthesefactsmayappearatfirstglance,theyareactuallynotsoobviousastheyseemexceptwhenwetakespecialpainstothinkaboutthesubject.…71.InParagraph3,“takespecialpains”probablymeans“_____”.A.tryveryhardB.takeourtimeC.areveryunhappyD.feelespeciallypainful【答案析】A7．利用經(jīng)驗(yàn)和常識猜詞…“IwasonthewaytoapersonalinjuryaccidentinWestNashville.AsIgotontoHighway40,bluelightsandsirens(警笛)going,IfellinbehindagoldPontiacFirebirdthatsuddenlyseemedtotakeoffquicklydownthehighway.Thedriversomehowpanickedatthesightofme.Hewasgoingmorethanahundredmilesanhourandbeganpassingcarsontheshoulder.”63.Themeaningof“panicked”inParagraph2isrelatedto___________.A.shameB.hateC.angerD.fear【答案】D【解析】根據(jù)本段內(nèi)容描述，可以知道panicked意思是“驚慌”，相當(dāng)于fear。題組一（2018年高考真題）Passage1(2018·新課標(biāo)卷I，C)Languageshavebeeningandgoingforthousandsofyears,butinrecenttimestherehasbeenlessingandalotmoregoing.Whentheworldwasstillpopulatedbyhuntergatherers,small,tightlyknit(聯(lián)系)groupsdevelopedtheirownpatternsofspeechindependentofeachother.Somelanguageexpertsbelievethat10,000yearsago,whentheworldhadjustfivetotenmillionpeople,theyspokeperhaps12,000languagesbetweenthem.Soonafterwards,manyofthosepeoplestartedsettlingdowntobeefarmers,andtheirlanguagestoobecamemoresettledandfewerinnumber.Inrecentcenturies,trade,industrialization,thedevelopmentofthenationstateandthespreadofuniversalpulsoryeducation,especiallyglobalisationandbettermunicationsinthepastfewdecades,allhavecausedmanylanguagestodisappear,anddominantlanguagessuchasEnglish,SpanishandChineseareincreasinglytakingover.Atpresent,theworldhasabout6,800languages.Thedistributionoftheselanguagesishugelyuneven.Thegeneralruleisthatmildzoneshaverelativelyfewlanguages,oftenspokenbymanypeople,whilehot,wetzoneshavelots,oftenspokenbysmallnumbers.Europehasonlyaround200languages;theAmericasabout1,000;Africa2400;andAsiaandthePacificperhaps3,200,ofwhichPapuaNewGuineaaloneaccountsforwellover800.Themediannumber(中位數(shù))ofspeakersisamere6,000,whichmeansthathalftheworld’slanguagesarespokenbyfewerpeoplethanthat.Alreadywellover400ofthetotalof,6,800languagesareclosetoextinction(消亡),withonlyafewelderlyspeakersleft.Pick,atrandom,BusuuinCameroon(eightremainingspeakers),ChiapanecoinMexico(150),LipanApacheintheUnitedStates(twoorthree)orWadjiguinAustralia(one,withaquestionmark):noneoftheseseemstohavemuchchanceofsurvival.28.Whatcanweinferaboutlanguagesinhuntergatherertimes?A.Theydevelopedveryfast.B.Theywerelargeinnumber.C.Theyhadsimilarpatterns.D.Theywerecloselyconnected.29.Whichofthefollowingbestexplains"dominant"underlinedinparagraph2？A.plex. B.Advanced.C.Powerful. D.Modern.30.Howmanylanguagesarespokenbylessthan6,000peopleatpresent?A.About6,800 B.About3,400C.About2,400 D.About1,20031.Whatisthemainideaofthetext?A.Newlanguageswillbecreated.B.People’slifestylesarereflectedinlanguages.C.Humandevelopmentresultsinfewerlanguages.D.Geographydetermineslanguageevolution.Passage2(2018·新課標(biāo)卷II，) StevenSteinlikestofollowgarbagetrucks.Hisstrangehabitmakessensewhenyouconsiderthathe’sanenvironmentalscientistwhostudieshowtoreducelitter,includingthingsthatfalloffgarbagetrucksastheydrivedowntheroad.Whatisevenmoreinterestingisthatoneof

Stein'sjobsisdefendinganindustrybehindtheplasticshoppingbags. Americansusemorethan100billionthinfilmplasticbagseveryyear.Somanyendupintreebranchesoralonghighwaysthatagrowingnumberofcitiesdonotallowthematcheckouts(收銀臺).Thebagsareprohibitedinsome90citiesinCalifornia,includingLosAngeles.Eyeingtheseheadwinds,plasticbagmakersarehiringscientistslike

Stein

to

makethecasethattheirproductsarenotasbadfortheplanetasmostpeopleassume. Amongthebagmakers'argument:manycitieswithbansstillallowshoppers

to

purchasepaperbags,whichareeasilyrecycledbutrequiremoreenergy

to

produceandtransport.Andwhileplasticbagsmaybeugly

to

lookat,theyrepresentasmallpercentageofall

garbage

onthegroundtoday. Theindustryhasalsotakenaimattheproductthathasappearedasitsreplacement:reusableshoppingbags.Thestrongerareusablebagis,thelongeritslifeandthemoreplasticbaguseitcancelsout.However,longerlastingreusablebagsoftenrequiremoreenergy

to

make.Onestudyfoundthatacottonbagmustbeusedatleast131timestobebetterfortheplanetthanplastic. Environmentalistsdon'tdispute（質(zhì)疑）thesepoints.Theyhopepaperbagswillbebannedsomedaytooandwantshoppers

to

usethesamereusablebagsforyears.24.WhathasStevenSteinbeenhiredtodo?A.Helpincreasegrocerysales. B.Recyclethewastematerial.C.Stopthingsfallingofftrucks. D.Arguefortheuseofplasticbags.25.Whatdoestheword“headwinds”inparagraph2referto?A.Bansonplasticbags. B.Effectsofcitydevelopment.C.Headachescausedbygarbage. D.Plasticbagshungintrees.26.Whatisadisadvantageofreusablebagsaccordingtoplasticbagmakers?A.Theyarequiteexpensive. B.Replacingthemcanbedifficult.C.Theyarelessstrongthanplasticbags. D.Producingthemrequiresmoreenergy.27.Whatisthebesttitleforthetext?A.Plastic,PaperorNeither B.Industry,PollutionandEnvironmentC.RecycleorThrowAway D.GarbageCollectionandWasteControlPassage3(2018·浙江卷，B) StevenSteinlikestofollowgarbagetrucks.Hisstrangehabitmakessensewhenyouconsiderthathe’sanenvironmentalscientistwhostudieshowtoreducelitter,includingthingsthatfalloffgarbagetrucksastheydrivedowntheroad.Whatisevenmoreinterestingisthatoneof

Stein'sjobsisdefendinganindustrybehindtheplasticshoppingbags. Americansusemorethan100billionthinfilmplasticbagseveryyear.Somanyendupintreebranchesoralonghighwaysthatagrowingnumberofcitiesdonotallowthematcheckouts(收銀臺).Thebagsareprohibitedinsome90citiesinCalifornia,includingLosAngeles.Eyeingtheseheadwinds,plasticbagmakersarehiringscientistslike

Stein

to

makethecasethattheirproductsarenotasbadfortheplanetasmostpeopleassume. Amongthebagmakers'argument:manycitieswithbansstillallowshoppers

to

purchasepaperbags,whichareeasilyrecycledbutrequiremoreenergy

to

produceandtransport.Andwhileplasticbagsmaybeugly

to

lookat,theyrepresentasmallpercentageofall

garbage

onthegroundtoday. Theindustryhasalsotakenaimattheproductthathasappearedasitsreplacement:reusableshoppingbags.Thestrongerareusablebagis,thelongeritslifeandthemoreplasticbaguseitcancelsout.However,longerlastingreusablebagsoftenrequiremoreenergy

to

make.Onestudyfoundthatacottonbagmustbeusedatleast131timestobebetterfortheplanetthanplastic. Environmentalistsdon'tdispute（質(zhì)疑）thesepoints.Theyhopepaperbagswillbebannedsomedaytooandwantshoppers

to

usethesamereusablebagsforyears.24.WhathasStevenSteinbeenhiredtodo?A.Helpincreasegrocerysales. B.Recyclethewastematerial.C.Stopthingsfallingofftrucks. D.Arguefortheuseofplasticbags.25.Whatdoestheword“headwinds”inparagraph2referto?A.Bansonplasticbags. B.Effectsofcitydevelopment.C.Headachescausedbygarbage. D.Plasticbagshungintrees.26.Whatisadisadvantageofreusablebagsaccordingtoplasticbagmakers?A.Theyarequiteexpensive. B.Replacingthemcanbedifficult.C.Theyarelessstrongthanplasticbags. D.Producingthemrequiresmoreenergy.27.Whatisthebesttitleforthetext?A.Plastic,PaperorNeither B.Industry,PollutionandEnvironmentC.RecycleorThrowAway D.GarbageCollectionandWasteControlPassage4(2018·北京卷，D)PreparingCitiesforRobotCarsThepossibilityofselfdrivingrobotcarshasoftenseemedlikeafuturist’sdream,yearsawayfrommaterializingintherealworld.Well,thefutureisapparentlynow.TheCaliforniaDepartmentofMotorVehiclesbegangivingpermitsinAprilforpaniestotesttrulyselfdrivingcarsonpublicroads.Thestatealsoclearedthewayforpaniestosellorrentoutselfdrivingcars,andforpaniestooperatedriverlesstaxiservices.California,itshouldbenoted,isn’tleadingthewayhere.panieshavebeentestingtheirvehiclesincitiesacrossthecountry.It’shardtopredictwhendriverlesscarswillbeeverywhereonourroads.Buthoweverlongittakes,thetechnologyhasthepotentialtochangeourtransportationsystemsandourcities,forbetterorforworse,dependingonhowthetransformationisregulated.Whilemuchofthedebatesofarhasbeenfocusedonthesafetyofdriverlesscars(andrightfullyso),policymakersalsoshouldbetalkingabouthowselfdrivingvehiclescanhelpreducetrafficjams,cutemissions(排放)andoffermoreconvenient,affordablemobilityoptions.Thearrivalofdriverlessvehiclesisachancetomakesurethatthosevehiclesareenvironmentallyfriendlyandmoreshared.Dowewanttocopy—orevenworsen—thetrafficoftodaywithdriverlesscars?Imagineafuturewheremostadultsownindividualselfdrivingvehicles.Theytoleratelong,slowjourneystoandfromworkonpackedhighwaysbecausetheycanwork,entertainthemselvesorsleepontheride,whichencouragesurbanspread.Theytaketheirdriverlesscartoanappointmentandsettheemptyvehicletocirclethebuildingtoavoidpayingforparking.Insteadofwalkingafewblockstopickupachildorthedrycleaning,theysendtheselfdrivingminibus.Theconvenienceevenleadsfewerpeopletotakepublictransport—anunwelesideeffectresearchershavealreadyfoundinridehailing(叫車)services.AstudyfromtheUniversityofCaliforniaatDavissuggestedthatreplacingpetrolpoweredprivatecarsworldwidewithelectric,selfdrivingandsharedsystemscouldreducecarbonemissionsfromtransportation80%andcutthecostoftransportationinfrastructure(基礎(chǔ)設(shè)施)andoperations40%by2050.Feweremissionsandcheapertravelsoundprettyappealing.Thefirstmerciallyavailabledriverlesscarswillalmostcertainlybefieldedbyridehailingservices,consideringthecostofselfdrivingtechnologyaswellasliabilityandmaintenanceissues(責(zé)任與維護(hù)問題).Butdriverlesscarownershipcouldincreaseasthepricesdropandmorepeoplebeefortablewiththetechnology.Policymakersshouldstartthinkingnowabouthowtomakesuretheappearanceofdriverlessvehiclesdoesn’textendtheworstaspectsofthecarcontrolledtransportationsystemwehavetoday.Theingtechnologicaladvancementpresentsachanceforcitiesandstatestodeveloptransportationsystemsdesignedtomovemorepeople,andmoreaffordably.Thecarofthefutureising.Wejusthavetoplanforit.47.Accordingtotheauthor,attentionshouldbepaidtohowdriverlesscarscan__________.A.helpdealwithtransportationrelatedproblemsB.providebetterservicestocustomersC.causedamagetoourenvironmentD.makesomepeoplelosejobs48.Asfordriverlesscars,whatistheauthor’smajorconcern?A.Safety. B.Sideeffects.C.Affordability. D.Management.49.Whatdoestheunderlinedword＂fielded＂inParagraph4probablymean?A.Employed. B.Replaced.C.Shared. D.Reduced.50.Whatistheauthor’sattitudetothefutureofselfdrivingcars?A.Doubtful. B.Positive.C.Disapproving. D.Sympathetic.題組二（2017年高考真題）Passage1(2017·新課標(biāo)卷II，D)Whenaleafyplantisunderattack,itdoesn’tsitquietly.Backin1983,twoscientists,JackSchultzandIanBaldwin,reportedthatyoungmapletreesgettingbittenbyinsectssendoutaparticularsmellthatneighboringplantscanget.Thesechemicalsefromtheinjuredpartsoftheplantandseemtobeanalarm.Whattheplantspumpthroughtheairisamixtureofchemicalsknownasvolatileorganicpounds,VOCsforshort.ScientistshavefoundthatallkindsofplantsgiveoutVOCswhenbeingattacked.It’saplant’swayofcryingout.Butisanyonelistening?Apparently.Becausewecanwatchtheneighboursreact.Someplantspumpoutsmellychemicalstokeepinsectsaway.Butothersdodoubleduty.Theypumpoutperfumesdesignedtoattractdifferentinsectswhoarenaturalenemiestotheattackers.Oncetheyarrive,thetablesareturned.Theattackerwhowaslunchingnowbeeslunch.Instudyafterstudy,itappearsthatthesechemicalconversationshelptheneighbors.Thedamageisusuallymoreseriousonthefirstplant,buttheneighbors,relativelyspeaking,staysaferbecausetheyheardthealarmandknewwhattodo.Doesthismeanthatplantstalktoeachother?Scientistsdon’tknow.Maybethefirstplantjustmadeacryofpainorwassendingamessagetoitsownbranches,andso,ineffect,wastalkingtoitself.Perhapstheneighborsjusthappenedto“overhear”thecry.Soinformationwasexchanged,butitwasn’tatrue,intentionalbackandforth.Charles

Darwin,

over

150

years

ago,

imagined

a

world

far

busier,

noisier

and

more

intimate(親密的)

than

the

world

we

can

see

and

hear.

Our

senses

are

weak.

There’s

a

whole

lot

going

on.32.

What

does

a

plant

do

when

it

is

under

attack?A.

It

makes

noises.

B.

It

gets

help

from

other

plants.C.

It

stands

quietly

D.

It

sends

out

certain

chemicals.33.

What

does

the

author

mean

by

“the

tables

are

turned”

in

paragraph

3?A.

The

attackers

get

attacked.B.

The

insects

gather

under

the

table.C.

The

plants

get

ready

to

fight

back.D.

The

perfumes

attract

natural

enemies.34.Scientistsfindfromtheirstudiesthatplantscan.A.predictnaturaldisastersB.protectthemselvesagainstinsectsC.talktooneanotherintentionallyD.helptheirneighborswhennecessary35.whatcanweinferfromthelastparagraph?A.Theworldischangingfasterthanever.B.PeoplehavestrongersensesthanbeforeC.TheworldismoreplexthanitseemsD.PeopleinDarwin’stimewereimaginative.Passage2(2017·新課標(biāo)III卷，C)Afteryearsofheateddebate,graywolveswerereintroducedtoYellowstoneNationalPark.FourteenwolveswerecaughtinCanadaandtransportedtothepark.Bylastyear,theYellowstonewolfpopulationhadgrowntomorethan170wolves.GraywolvesoncewereseenhereandthereintheYellowstoneareaandmuchofthecontinentalUnitedStates,buttheyweregraduallydisplacedbyhumandevelopment.Bythe1920s,wolveshadpracticallydisappearedfromtheYellowstonearea.TheywentfarthernorthintothedeepforestsofCanada,wheretherewerefewerhumansaround.Thedisappearanceofthewolveshadmanyunexpectedresults.Deerandelkpopulations—majorfoodsources(來源)forthewolf—grewrapidly.Theseanimalsconsumedlargeamountsofvegetation(植被),whichreducedplantdiversityinthepark.Intheabsenceofwolves,coyotepopulationsalsogrewquickly.Thecoyoteskilledalargepercentageofthepark’sredfoxes,andpletelydroveawaythepark’sbeavers.Asearlyas1966,biologistsaskedthegovernmenttoconsiderreintroducingwolvestoYellowstonePark.Theyhopedthatwolveswouldbeabletocontroltheelkandcoyoteproblems.Manyfarmersopposedtheplanbecausetheyfearedthatwolveswouldkilltheirfarmanimalsorpets.Thegovernmentspentnearly30yearsingupwithaplantoreintroducethewolvers.TheU.S.FishandWildlifeServicecarefullymonitorsandmanagesthewolfpacksinYellowstone.Today,thedebatecontinuesoverhowwellthegraywolfisfittinginatYellowstone.Elk,deer,andcoyotepopulationsaredown,whilebeaversandredfoxeshavemadeaeback.TheYellowstonewolfprojecthasbeenavaluableexperimenttohelpbiologistsdecidewhethertoreintroducewolvestootherpartsofthecountryaswell.28.Whatisthetextmainlyabout?A.WildliferesearchintheUnitedStates.B.PlantdiversityintheYellowstonearea.C.Theconflictbetweenfarmersandgraywolves.D.ThereintroductionofwolvestoYellowstonePark.29.Whatdoestheunderlinedword＂displaced＂inparagraph2mean?A.Tested. B.Separated. C.Forcedout. D.Trackeddown.30.Whatdidthedisappearanceofgraywolvesbringabout?A.Damagetolocalecology.B.Adeclineinthepark’sine.C.Preservationofvegetation.D.Anincreaseinthevarietyofanimals.31.Whatistheauthor’sattitudetowardstheYellowstonewolfproject?A.Doubtful. B.Positive. C.Disapproving. D.Uncaring.Passage3(2017·天津卷)Thismonth,Germany’stransportminister,AlexanderDobrindt,proposedthefirstsetofrulesforautonomousvehicles(自主駕駛車輛).Theywoulddefinethedriver’sroleinsuchcarsandgovernhowsuchcarsperformincrasheswherelivesmightbelost.Theproposalattemptstodealwithwhatsomecallthe“deathvalley”ofautonomousvehicles:thegreyareabetweensemiautonomousandfullydriverlesscarsthatcoulddelaythedriverlessfuture.Dobrindtwantsthreethings:thatacaralwayschoosesproperty(財(cái)產(chǎn))damageoverpersonalinjury;thatitneverdistinguishesbetweenhumansbasedonageorrace;andthatifahumanremoveshisorherhandsfromthedrivingwheel—tocheckemail,say—thecar’smakerisresponsibleifthereisacrash.“Thechangetotheroadtrafficlawwillpermitfullyautomaticdriving,”saysDobrindt.Itwillputfullydriverlesscarsonanequallegalfootingtohumandrivers,hesays.Whoisresponsiblefortheoperationofsuchvehiclesisnotclearamongcarmakers,consumersandlawyers.“Theliability(法律責(zé)任)issueisthebiggestoneofthemall,”saysNatashaMeratattheUniversityofLeeds,UK.AnassumptionbehindUKinsurancefordriverlesscars,introducedearlierthisyear,insiststhatahuman“bewatchfulandmonitoringtheroad”ateverymoment.Butthatisnotwhatmanypeoplehaveinmindwhenthinkingofdriverlesscars.“Whenyousay‘driverlesscars’,peopleexpectdriverlesscars.”Meratsays.“Youknow—nodriver.”Becauseoftheconfusion,Meratthinkssomecarmakerswillwaituntilvehiclescanbefullyautomatedwithoutoperation.Driverlesscarsmayendupbeingaformofpublictransportratherthanvehiclesyouown,saysRyanCaloatStanfordUniversity,California.ThatishappeningintheUKandSingapore,wheregovernmentprovideddriverlessvehiclesarebeinglaunched.ThatwouldgodownpoorlyintheUS,however.“Theideathatthegovernmentwouldtakeoverdriverlesscarsandtreatthemasapublicgoodwouldgetabsolutelynowherehere,”saysCalo.46.Whatdoesthephrase“deathvalley”inParagraph2referto?A.Aplacewherecarsoftenbreakdown.B.Acasewherepassingalawisimpossible.C.Anareawherenodrivingispermitted.D.Asituationwheredrivers’roleisnotclear.47.TheproposalputforwardbyDobrindtaimsto__________.A.stoppeoplefrombreakingtrafficrulesB.helppromotefullyautomaticdrivingC.protectdriversofallagesandracesD.preventseriouspropertydamage48.Whatdoconsumersthinkoftheoperationofdriverlesscars?A.Itshouldgettheattentionofinsurancepanies.B.Itshouldbethemainconcernoflawmakers.C.Itshouldnotcausedeadlytrafficaccidents.D.Itshouldinvolvenohumanresponsibility.49.Driverlessvehiclesinpublictransportseenobrightfuturein_________.A.Singapore B.theUK C.theUS D.Germany50.Whatcouldbethebesttitleforthepassage?A.AutonomousDriving:WhoseLiability?B.FullyAutomaticCars:ANewBreakthroughC.AutonomousVehicles:DriverRemoved!D.DriverlessCars:RootofRoadAccidentsPassage4(2017·江蘇卷)Beforebirth,babiescantellthedifferencebetweenloudsoundsandvoices.Theycanevendistinguishtheirmother’svoicefromthatofafemalestranger.Butwhenitestoembryoniclearning(胎教),birdscouldruletheroost.AsrecentlyreportedinTheAuk:OrnithologicalAdvances,somemotherbirdsmayteachtheiryoungtosingevenbeforetheyhatch(孵化).Newbornchickscanthenimitatetheirmom’scallwithinafewdaysofenteringtheworld.Thiseducationalmethodwasfirstobservedin2012bySoniaKleindorfer,abiologistatFlindersUniversityinSouthAustralia,andhercolleagues.FemaleAustraliansuperbfairywrenswerefoundtorepeatonesoundoverandoveragainwhilehatchingtheireggs.Whentheeggswerehatched,thebabybirdsmadethesimilarchirptotheirmothers—asoundthatservedastheirregular＂feedme!＂call.Tofindoutifthespecialqualitywasmorewidespreadinbirds,theresearcherssoughttheredbackedfairywren,anotherspeciesofAustraliansongbird.Firsttheycollectedsounddatafrom67nestsinfoursitesinQueenslandbeforeandafterhatching.Thentheyidentifiedbeggingcallsbyanalyzingtheorderandnumberofnotes.Aputeranalysisblindlyparedcallsproducedbymothersandchicks,rankingthembysimilarity.Itturnsoutthatbabyredbackedfairywrensalsoemergechirpingliketheirmoms.Andthemorefrequentlymothershadcalledtotheireggs,themoresimilarwerethebabies’beggingcalls.Inaddition,theteamsetupaseparateexperimentthatsuggestedthatthebabybirdsthatmostcloselyimitatedtheirmom’svoicewererewardedwiththemostfood.Thisobservationhintsthateffectiv