2021屆高中英語(yǔ)二輪復(fù)習(xí)(大題)3 閱讀理解 說(shuō)明文 含解析

3閱讀理解說(shuō)明文一典【例題全I(xiàn)II卷Withtheyoungunableaffordleavehomeandoldatriskisolation(孤獨(dú))morefamiliesarechoosingtolivetogether.Thedoorwaytoquiet,forNickBrightleast,leadsstraighttomother-in-law,whoongroundfloor,whilehelivesupstairswithhiswifetheirtwodaughters.Fouryearsagotheyallmovedintoathree-storeyVictorianhouseinBristoloneofagrowingnumberofmultigenerationalfamiliesintheUKlivingtogetherunderroof.Theysharefrontdoorandmachine,butWhiteheadherownkitchen,bathroom,bedroomandlivingroomonthegroundfloatedideatomymumofsharinghouse,saysKathrynWhitehead.RitacutswithNickbecauseIthink’sabigthingforNicktolivewithhismother-in-law.AndwhatdoesNickthink?“Frommystandpoint,itseemstoverywell.WouldIit?Yes,IthinkIwould.”’stoexactlyhowmanypeopleagreehim,researchindicatesthenumbershaverisingfortime.Officialreportssuggestthatthenumberofhouseholdsthreegenerationslivingtogetherrisenfrom325,0002002to419,000in2013.Othervarietiesofmultigenerationalfamilyaremorecommon.peoplelivewiththeirelderlyparents;manymoreadultchildrenarereturningtofamilyhome,iftheyeverleft.Itsaidthatabout25-34-year-oldslivewiththeirparents,comparedwith1991.ThetotalnumberallmultigenerationalhouseholdsinBritainthoughtbe1.8million.Storieslikethataremorecommoninpartsofworldwheremultigenerationallivingisfirmlyrooted.InIndia,particularlyoutsidecities,youngexpectedmoveinwiththeirhusband’sfamilywhentheygetmarried.28.WhomainlyusesgroundfloortheVictorianhouseBristol?A.Nick.B.Rita.C.KathrynD.Thedaughters.29.attitudetowardssharingthehismother-in-law?A.Positive.B.Carefree.C.Tolerant.D.Unwilling.30.theauthorstatementaboutmultigenerationalfamilybasedon?A.traditions.C.Publishedstatistics.

B.Financialreports.D.Publicopinions.

31.thetextmainlyabout?A.Lifestylesdifferentcountries.B.Conflictsgenerations.C.housinginBritain.D.risingoflivinginUK.【案1.B2.A3.C4.D【析這是一篇新聞道。短文報(bào)道了在英國(guó)，由于年輕人負(fù)擔(dān)不起離家的費(fèi)用，而老人又甚感孤獨(dú)，越來(lái)越多的家庭選擇住在一起，出了多世同堂的現(xiàn)象。1.細(xì)節(jié)理解題。根據(jù)第三段butRitaWhiteheadhasherownkitchen,bathroom,bedroomandlivingroomtheground”知，但Rita在樓有自己的廚房、室、臥室和客廳。由此可知Rita布里斯托爾的維利亞式住宅中占用一樓。故選項(xiàng)2.推理判斷題。根據(jù)第五段“Fromstandpoint,itseemstoverywell.WouldIrecommendYes,IthinkIwould.”知，尼克對(duì)和和岳母合住房子的態(tài)度是積極的。A3.細(xì)節(jié)理解題。第六段提到官方告顯示，三代同堂的家庭數(shù)量從2002年32.5萬(wàn)加到2013年41.9萬(wàn)戶。第七段則說(shuō)25-34歲年輕人中有20%母住在一起，而1991年一比例為據(jù)估計(jì)，國(guó)多代同堂的家庭總數(shù)約為180此知者于多世同堂家庭的論述是基于發(fā)布的統(tǒng)計(jì)數(shù)據(jù)C。4.主旨大意題。通讀全文，尤其據(jù)第一段可知，由于年輕人負(fù)擔(dān)不起離家的費(fèi)用，而老年人又感孤獨(dú)，越來(lái)越多的家庭選擇住在一起。所短文主要是關(guān)于英國(guó)該種生活方式的一種上升趨勢(shì)。故D項(xiàng)。二模練(一)societiesdevelopedfoodpreferencesbasedonwhatwasavailableandwhatthegroupdecidedlikedmost.Thosepreferencesthenpassedalongsociallylearnedbehaviors,values,knowledgeandcustomsthatmakeupculture.Besidesmanyothersocialanimalsarebelievedtoexhibitformscultureinvariousways,too.Infact,accordingtonewstudyledbyHarvardscientistLiranSamuni,bonobos(倭猩,ofclosestlivingrelatives,couldbethelatestadditionthelist.TheresearchersstudiedhuntingandfeedinghabitsoftwoneighboringgroupsofbonobosinDemocraticRepublicofCongo.Analyzingthedata,theysawmanysimilaritiesintheofthetwobonobogroups—theEkalakalaandtheKokoalongo.TheyalsotheaccessandopportunitytohuntthesameofThis,however,ispreciselyresearchersnoticedstrikingdifference.Thegroupsconsistentlypreferredtoandfeastontwodifferenttypesofprey.Ekalakalagroupwentafterananomalure尾松鼠.TheKokoalongogrouponthehand,favoreda小羚羊).

“Itbasicallyliketwohumanculturesexploitingacommonresourceindifferentways,”saysSamuni.abouttwocultureslivingcloseeachotherhavingdifferentpreferences:Onepreferschickenwhileotherismoreabeef-eatingculture.Usingstatisticalmodeling,theresearchersfoundthattheonlyvariablethatcouldreliablypredictpreypreferencewaswhetherthehuntersEkalakalaKokoalongo.Theresearchershaven'tyetinvestigatedhowbonobogroupslearnedthishuntingpreference,butthroughtheiranalysistheyabletoruleoutecologicalfactorsorgeneticdifferences.Basically,itmeansallevidencepointstowardthisbeingalearnedsocialbehavior.“Ifourclosestlivingrelativeshavesomeculturaltraits(),thenlikelyourancestorsalreadyhadsomecapacityforculture,”says.5.doparagraphs3and4mainlytalkabout?A.findingsofthestudy.B.backgroundofthestudy.C.processofstudy.D.challengesdoingthestudy.6.HowdoesSamuniperceivethetwogroups’differenthuntingpreferences?A.areunusualphenomenon.B.arealearnedsocialbehavior.C.contradicthumancultures.D.bonobos’highintelligence.7.ofthefollowingcouldinfluencethebonobos'preypreference?A.timingofhunting.B.theybelongto.C.Theirhuntingtechniques.D.Theirsurroundingenvironment.8.mightthefindingsofthebonobos'huntingpreferenceindicate?A.humansocietyborn.B.Howhumansocietydeveloped.C.Whathelpedhumanculturechange.D.Howhumanculturefirstappeared.【案5.A6.7.【析這是一篇明文章了哈佛大學(xué)科學(xué)家Samuni領(lǐng)導(dǎo)的一項(xiàng)新研究黑可能是

我們現(xiàn)存的最親密的親戚之一，且對(duì)其進(jìn)行研究觀察，來(lái)證明這一種習(xí)得的社會(huì)行為。5．主旨大意題。根據(jù)文章第三TheresearchersstudiedthehuntingandfeedinghabitsoftwoneighboringgroupsofbonobosintheDemocraticRepublic研人研究了剛果民主共和國(guó)兩個(gè)相鄰的倭黑猩猩群體的狩獵和進(jìn)食習(xí)慣。和文章第段Thegroupsconsistentlypreferredtohuntfeastondifferenttypesofprey.Ekalakalagroupwentafterananomalure(鱗松鼠.TheKokoalongogroupthehand,favoredaduiker(羚)這組動(dòng)物一直喜歡捕食兩不同類型的獵物拉組尋找一個(gè)鱗尾松鼠，科科阿隆戈部落更喜歡小羚羊。知，文章第三段和第四段主要講述了研究的發(fā)現(xiàn)。故A。6斷題章這本上就像是兩種人文化以不同的方式開(kāi)發(fā)同一種資源說(shuō)“兩種文化，雖然相距很近但卻有著不同的偏好：一種更喜歡吃雞肉，而另一種則更喜歡牛肉章倒數(shù)第二段研究人員還沒(méi)有調(diào)查倭黑猩猩群體是如了解這種狩獵偏好的，但通過(guò)分析，他們能夠排除生態(tài)因素或遺傳差異?；旧?，這味著所有的證據(jù)都表明這是一種習(xí)得的社會(huì)行為。可知認(rèn)兩個(gè)倭黑猩猩群體不同的狩獵偏好是種習(xí)得的社會(huì)行為。故7．推理判斷題。根據(jù)文章第六利統(tǒng)計(jì)模型，研究人員發(fā)現(xiàn)，唯一能可靠預(yù)測(cè)獵物偏好的變量獵人是?？ɡɡ?duì)還是科科阿隆戈?？芍鼈兯鶎俚娜后w會(huì)影響倭黑猩猩的獵物偏好。故B8．理判斷題。根據(jù)文章第一第一句

societiesdevelopedfoodpreferencesbasedonwhatwasavailableandwhatthedecideditlikedmost人會(huì)的食物偏好是建立在現(xiàn)有食物和群體最喜歡的食物的基礎(chǔ)上的。和文章最后一段Ifourclosestlivingrelativeshavesomecultural特),thenit'slikelyourancestorsalreadyhadcapacityforculture如我們現(xiàn)存的近親有一些文化特征，那么很可能我們的祖先經(jīng)有了一些文化能力?？赏浦?，倭黑猩猩獵偏好的發(fā)現(xiàn)可能表明人類文化最初是如何出現(xiàn)的。故D(二)Masksthathelpedsaveduringthecoronaviruspandemic(流)areprovingadeadlydangerforwildlife,withbirdsandmarinecreaturestrappedintheincredibleofabandonedfacialcoveringslitteringanimalhabitats.Single-usesurgicalmaskshavefoundaroundpavements,waterwaysandbeachesworldwidesincecountriesbegandemandingtheirinpublicplacestoslowthepandemic'sspread.獼)havespottedchewingthestraps(子)offoldanddesertedmasksMalaysiaapotentialchokingdangerformonkeys.AndinincidentthatcapturedheadlinesBritain,鷗wasrescuedincityChelmsfordafteritslegstangled（結(jié)instrapsofdisposablemasktoaTheanimalwelfarecharitywasalertedafterbirdspottedmotionlessbutstillalive,andtheyittoawildlifehospitalfortreatmentbeforeitsrelease.Thebiggestmayinthewater.Morethanl.5billiontheirwayintotheworld'soceanslastyear.Accountingforaround6,200extratonsofmarineplasticpollution,accordingtoenvironmentalgroupOceansAsia.AlreadytheresignsthatmasksareworseningthreatstomarineConservationistsinBrazilinsidethe

stomachofapenguinafteritsbodywaswasheduponabeach,whileadeadpufferfish(河)discoveredcaughtinsideanotheroffthecoastofMiami.Masksglovesare“particularlyproblematic”forsea，saysGeorgeLeonard,chiefscientistU.S.-basedNGOOceanConservancy."Whentakesthoseplasticshundredsofyearstobreakdowntheenvironment,theyformsmallerandsmallerparticles,"headded,"thoseparticlesthenenterthefoodchainandimpactentireecosystems."Fortunately,therehasbeenshifttowardsgreaterofreusableclothmasksasthehaswornbutarestillchoosingthelightersingle-varieties.Campaignershaveurgedpeoplethrowawaythemproperlyandremovethestrapstoreducetheriskanimalstrapped.Asiahasalsocalledontoincreasefinesforlitteringandencouragetheuseofwashablemasks.9.roleplayduringthecoronaviruspandemic?A.peoplefreeoftheB.makepeoplemoremysterious.C.helpreducethespeedofpandemic'sspread.D.areofgreathelpfulwildlife.10.authorusestheexampleofMacaquesandagulltoshowthatA.thedesertedmasksputindangerB.theanimalslackenoughfoodC.theyenjoyplayingwithstrapsD.forpeopletoprotecttheanimals11.does“particularlyproblematic”inPara.4meanbyLeonard?A.Marinecreaturesintrouble.B.gloveswillfinallythreatenthewholeecosystems.C.plasticseasybreakdown.D.particlesmasksandglovesaresmallerandsmaller.12.thepassageismainlyabout?A.AnimalprotectionB.plasticpollutionC.HowreducetheriskofabandonedmasksD.desertedendangeringwildlife【案9.C10.A11.B12.D【析本文是一篇說(shuō)文型冠狀病毒大流行病幫助拯救生命的口大量地散落在動(dòng)

物棲息地，正被證明是野生動(dòng)物海洋生物的致命危險(xiǎn)。9．細(xì)節(jié)理解題。根據(jù)文章第一第一句thathelpedsavelivesduringthecoronaviruspandemic(流病)areprovingadeadlydangerforwildlife在狀病毒大流行期口罩幫助拯救生命和第二段最后一句toslowthepandemic'sspread流行病的蔓延?？芍谡钟兄跍p緩大流行的傳播速度。故項(xiàng)10判斷題據(jù)段提從國(guó)開(kāi)始要求在公共場(chǎng)所使用一次性外科口罩來(lái)減緩這種行病的蔓延以來(lái)各地的人行道道海灘都發(fā)現(xiàn)了一次性外科口罩猴嚼口罩帶子存在息危險(xiǎn)只海鷗（海鷗)的腿在一次性口罩的帶子上纏住長(zhǎng)達(dá)一周，可推得出遺棄的口罩使野生動(dòng)物面臨危險(xiǎn)。故選A項(xiàng)．判斷題。由第四段Whenittakesthoseplasticshundredsofyearstobreakdowntheenvironment,theyformsmallerandsmallerparticles,headded,“thoseparticlesthenenterthefoodchainandimpactentireecosystems.這塑需百年的時(shí)間在環(huán)境中分解，們會(huì)形成越來(lái)越小的顆粒，他補(bǔ)充說(shuō)，這些顆粒隨后進(jìn)入食物鏈，影響整個(gè)生態(tài)系統(tǒng)可知，口罩和手套最終會(huì)威脅到整個(gè)生態(tài)系統(tǒng)。故B項(xiàng)12旨大意題據(jù)一段Masksthathelpedlivesduringthecoronaviruspandemicareprovingadeadlydangerforwildlife,withbirdsmarinecreaturestrappedtheincrediblenumberofabandonedfacialcoveringslitteringonanimalhabitats.事明，在冠狀病大流行期間曾幫助拯救生命的口罩對(duì)野生動(dòng)物來(lái)說(shuō)是一種致命的危險(xiǎn)量遺棄的面部覆物在動(dòng)物棲息地隨處散落類海洋生物受到威脅以要是關(guān)于廢棄的口罩危及野生動(dòng)物。故選D。(三)Astheeffectsofclimatechangebecomemoredisastrous,well-knownresearchinstitutionsandgovernmentagenciesarefocusingnewmoneyandattentiononidea:artificiallycoolingtheplanet,inthehopesbuyinghumanitymoretimetocutgreenhousegasemissions.Thatstrategy,calledsolarclimateintervention)orsolargeoengineering,involvesreflectingofsunenergybackintospaceabruptlyreducingglobaltemperaturesinathatimitatestheeffectsofcloudsflowingoutfromthevolcaniceruptions.Theideaconsideredasadangerousandfanciedsolution,onethatwouldencouragepeopletoburningfossilfuelswhileexposingtheplanettounexpectedandpotentiallythreateningsideeffects,producingmoredestructivehurricanes,wildfiresfloodsotherdisasters.But,globalcontinues,producingmoredestructivehurricanes,wildfiresandotherdisasters,someresearchersandpolicyexpertsthatconcernsaboutgeoengineeringshouldbeoutweighedtheimperativebetterunderstandit,caseconsequenceofclimatebecometerribletheworldcanforbettersolutions.Onewaytocooltheearthbyinjectingaerosols氣溶膠)intoupperlayeroftheatmospherewherethoseparticlesreflectsunlightawayfromtheearth.Thatprocessworks,accordingtoMacMartin,aresearcher

CornellUniversity.knowcertaintywecancooltheplanet,”hesaidaninterview.What’sstillunclear,headded,iswhathappensnext.Temperature,MacMartinsaid,anindicatorforalotofclimateeffects.doesittostrengthofhurricanes?asked,“Whatdoestoagricultureproduction?doesitdototheriskoffires?AnotherinstitutionbyNationalScienceFoundationwillanalyzehundredsofsimulationsaerosolinjection,testingeffectsonweatherextremesaroundtheworld.goaloftheresearchtolooksweetspot:theofartificialcoolingthatcanreduceextremeweathereventswithoutcausingbroaderchangesinregionalrainfallpatternsorsimilarimpacts.13．Whyresearchersgovernmentagenciescoolingtheearth?Apreventnaturaldisasters.C．imitatevolcaniceruptions.

B．moretimetoreducegasemissions.Dencouragemorepeopleburfossil14．Whatresearchersworriedaboutintermsofglobalwarming?A．volcanoeswillout.BMoresolarenergywillgointospace.CMoredisasterswillendangerthefutureoftheworld.DPeoplewillkeepburningfossiltokeepwarm.15．WhatcanbeinferredfromDouglas’ininterview?AHethinksresearchremainsbeB．optimisticabouteffectofcoolingtheearth.C．concernedaboutthereductionagricultureproduction.DHedisapprovesofthepracticeofclimateintervention.16．Whattheunderlinedwords“sweetspotinthelastparagraphATherainfallpatternofaregion.B．droptemperature.C．ofextremeweatherevents.DTheinjectionamountofaerosol.【案13.B14.C15.16.【析這是一篇說(shuō)文章要述球候化各種災(zāi)難性的天氣和關(guān)研究機(jī)構(gòu)提出的各種可能的應(yīng)對(duì)辦法。13細(xì)節(jié)理解題根第一段提著變化的影響變得更加嚴(yán)重研究機(jī)構(gòu)和政府機(jī)正把新的資金和注意力集中在一個(gè)想法地溫贏得更多時(shí)間來(lái)減少溫室氣體放研究者和政府機(jī)構(gòu)給地球降溫是了贏得更多的時(shí)間來(lái)減少溫室氣體的排放。故項(xiàng)

14理判斷題第三段someresearchersandpolicyexpertsthatconcernsaboutgeoengineeringshouldbeoutweighedbyimperativebetterunderstandincasetheconsequenceofclimatechangebecometerriblethatworldcanforbetter一研究人員和政策專家表示，當(dāng)務(wù)之急是更好了解地球工程，這比對(duì)地球工程的擔(dān)憂更重要化的后果變得如此可怕界不能等待更好的解決案研究者擔(dān)心全球變暖造成的各種難可能會(huì)讓未來(lái)的世界處于危險(xiǎn)中。故C項(xiàng)15．推理判斷題。根據(jù)第五“Whatitdotothestrengthhurricanes?”heasked,“Whatdoesdotoagricultureproduction?Whatdoesitdototheriskoffires?”他：它颶的度什影？對(duì)生產(chǎn)有什么影響？它對(duì)森林火災(zāi)風(fēng)險(xiǎn)有什么影響”可知認(rèn)有很多問(wèn)沒(méi)有解開(kāi)還很多研究有待去做。故選A項(xiàng)16．詞句猜測(cè)題。根據(jù)劃線詞所句Oneofresearchtolooksweetspot:theamountartificialcoolingthatcanreduceextremeweathereventswithoutcausingbroaderchangesinregionalrainfallpatternssimilarimpacts.項(xiàng)研究的目標(biāo)之一是尋找一“佳點(diǎn)”降溫的數(shù)量，既可以減少極端天氣事件，又不會(huì)造成區(qū)域降雨模式的廣泛變化或類似響?？芍@里佳指的是，人工降溫要適度，既可以解決氣候變帶來(lái)的極端天氣，又不會(huì)給氣候成太大的影響，因“asweetspot的是適度的降溫。故選B項(xiàng)(四)Chinasuccessfullysentthe52ndand53rdsatellitesofitsdomesticallydevelopedBeiDouNavigationSatelliteSystem(BDS)—thelastmediumEarthorbitsatellitesfortheBDS-3constellation(星)—intospaceonMonday,thecompletionofglobalnavigationsystemcoreconstellation)andthisyear’sBDSsatellitelaunchcampaign.LaunchedfromXichangSatelliteLaunchCenter,SichuanProvince,onboardaMarch-3BcarrierrocketanExpedition-1upperstage,thetwosatelliteswereinjectedplannedorbitsaftermorethanhoursflight.Sincefirstsatellitewaslaunchedon5,2017,Chinahasconducted18satellitelaunchmissions,successfullysendingintoplannedorbit,settinganationalrecordforhighestmissionfrequencyandsuccessrate.In-orbittestswillcarriedoutbeforetheMEOsatellitesarecommissioned(式委托.BytheconstellationfortheChineseglobalnavigationsatellitesystemwillbesuccessfullycompleted.Ping,chiefdesigneroftheBDS-3system,saidthatthehybridconstellationdesign,inthreeofsatellites—theInclinedGeoSynchronousOrbit(IGSO),andgeosynchronousorbit(GEO)—workinconcertindifferentexclusiveinnovationa“Existingglobalnavigationsatellitesystems,suchtheUSGPSandRussia’sGLONASS,onlyaMEOsatelliteconstellation,saidWang.Thesatellites,inorbit20,000kilometersEarth,areaspecialtypeofsatelliteprovidingglobalservice,whileandsatellites,inanorbit360,000kilometersaboveEarth,mainlyenhanceregionalservicequality,

accordingtoWang.ThatexplainedwhycompletionofMEOconstellationwassignificant,thecompletionofthenetworkforBDS-3,meaningaBDS-3globalcoveragewithoutweakpointscarriedout.FeedbackshowsthattheBDSservicequalitywasalreadycomparablesinceof2018,aftercompletingBDS-3,willgoodasWangsaid.17．manysatelliteswereintotheirplannedorbitsuccessfully?A3.B18.C30.D36.18．What’sadvantageofcomparedwithandGLONASS?AThediversefunctions.B．excellentservicequality.C．lowercostofdesigningit.DTheabilityworkindifferentorbits.19．WhytheMEOsatellitesimportant?ATheyenhanceregionalservicequality.B．Theybeputintouseimmediately.C．Theyenterorbits.DTheyserveworld.20．WhatmaythetheAChinatheFirstCountryLaunchaMEOSatelliteB．ConstellationDeploymentC．BDS-3BenefitedManyCountriesDExploringIsVeryImportanttothe【案17.C18.D19.20.B【析本文是說(shuō)明章述中國(guó)成功發(fā)射自主研發(fā)的第和53北斗導(dǎo)航衛(wèi)成全球?qū)Ш较到y(tǒng)的核心部署，并對(duì)北斗導(dǎo)航系進(jìn)行了介紹。17．細(xì)節(jié)理解題。根據(jù)第三自然中SincefirstBDS-3satellitelaunchedonNovember5,2017,Chinahasconducted18satellitelaunchmissions,successfullysending30intoplanned自年11日發(fā)射第一顆北斗三號(hào)衛(wèi)星以來(lái)，國(guó)已成功執(zhí)行18次斗星任務(wù)，將30衛(wèi)星送入計(jì)劃道?？芍呀?jīng)有30顆衛(wèi)星被送入計(jì)軌道。故選。18．細(xì)節(jié)理解題。根據(jù)第三自然…thehybridconstellationdesign,inthreeofsatellites—theInclinedGeoSynchronousOrbit(IGSO),MEOgeosynchronousorbit(GEO)—workinconcertindifferentorbits,wasexclusiveBDSinnovation…傾斜地球步軌(IGSO)、衛(wèi)(MEO)和同步(Geo)三組衛(wèi)星在不同軌道協(xié)同工作的混星設(shè)計(jì)，是北斗系統(tǒng)的獨(dú)家創(chuàng)新xistingglobalnavigationsatellitesystems,

suchtheUSGPSandRussia’sGLONASS,onlyaMEOsatellite有的全球衛(wèi)導(dǎo)航系統(tǒng)，如美國(guó)的GPS和俄羅斯的，有中軌衛(wèi)星?？芍?，只有北斗擁有不同軌道協(xié)同作能力。故選。19．細(xì)節(jié)理解題。根據(jù)第六自然中Thesatellites,inorbit20,000kilometersEarth,areaspecialtypeofsatelliteprovidingglobalservice,whiletheIGSOandGEOsatellites,inanorbit360,000kilometersaboveEarth,mainlyenhanceregionalservicequality,accordingtoWang.ThatexplainedwhycompletionofMEOconstellationwassignificant.據(jù)王介紹，在地球上空2萬(wàn)里軌道上運(yùn)行的星是提供全球務(wù)的特殊衛(wèi)星類型，而在地球上空36萬(wàn)里上運(yùn)的IGSO和GEO衛(wèi)主高區(qū)域服務(wù)質(zhì)量。這就解了M星的成為何意義重大?？芍狹EO衛(wèi)提全,義重大。故選D20．主旨大意題。根據(jù)第一段successfullysentthe52nd53rdsatellitesofdomesticallydevelopedBeiDouNavigationSatelliteSystem(BDS)—thelasttwomediumEarthorbit(MEO)satellitesfortheconstellation(星座)spaceonMonday,markingthecompletionoftheglobalnavigationsystem’scoreconstellationdeployment(部)andthisyearBDSsatellitelaunchcampaign.國(guó)于本周一功地將其國(guó)內(nèi)研制的北斗導(dǎo)航衛(wèi)星系統(tǒng)）第52顆顆星BDS-3星后兩顆中軌衛(wèi)星）送入太空，標(biāo)志著全球?qū)Ш较到y(tǒng)的核心星座部署和今的北斗導(dǎo)航衛(wèi)星的完成啟動(dòng)活動(dòng)。所以短文的最佳標(biāo)題“BDS-3的星座完成部署”故選。(五)Iftheworldwantstocontrolglobalwarming,watershortageandpollution,thenwealltowelcome“flexitariandiets,sayscientists.Thismeanseatingmainlyplant-basedakeysteptowardanenvironmentfriendlyfutureforin2050,theysay.Foodwastewillneedtobehalvedadfarmingpracticeswillalsotoimprove,accordingthearidoutbytheIntergovernmentalPanelonClimateChange(IPCC).Withoutaction,influencethesystemcouldincreasebyto90%Theauthorsthatpresentfoodindustryhasnumberofconsiderableenvironmentaleffectsincludingbeingagreatdriverofclimatechange,usingupfreshwaterandcausingpollutionthroughuseofchemicalfertilizer.Thestudysaysthatthankstopopulationincomegrowthexpected20102050,theseeffectscouldgrowbetween50-90%.Thiscouldourworldisplanetaryboundaries,theauthorssayrepresenta“safeoperatingspaceforhumanitytheinternationalcommunity”.However,thestudyfindsthatnosinglesolutionwillavoidthedangers,approachneeded.Sowhenitcomestoclimatechange,theauthorslookedtheycalleda“flexitarian”diet.caneatahealthydiestheyhaveincommon,accordingtolatestscientificevidence,isarerelativelyplant-based,”saidDr.MarcofromtheUniversityof“YoucangofromdietthathassmallamountsofanimalproductsmightitaMediterranean-baseddiet;weitflexitariandiet)over

to素的diet—wetriedstaythemosttraditionalofthesewhichinistheflexitarianone,buteventhishasonlyservingofredperweek.Ifthemovedtothistype