Unit 1 Welcome to the unit -Reading 课时作业- 高中英语牛津译林版（2020）必修第三册

Unit1SectionⅠWelcometotheunit&Reading课时作业（原卷+答案）Ⅰ.阅读理解ATheendangeredpandasintheQinlingMountainsmightfaceanewthreat(威胁):thelossoftheirfood,bamboo,whichmakesup99%oftheirmeals.Adultpandasspendmostofthetimeeatingbambooandhavetotakeinatleast40poundsadaytostayhealthy.However,anewstudywarnedthattheymightsoonfindtheirfoodgonebecausemostofthebamboointheQinlingMountainsmightdisappearbytheendofthecenturyasaresultoftherisingtemperature.AteammadeupofresearchershasstudiedtheeffectsofclimatechangeonthebamboointheQinlingMountains.Theyhavefoundthatbambooisverysensitivetoclimatechange.“80%to100%ofthebamboowillbegoneiftheaveragetemperatureincreasesby3.5degreesCentigradeworldwidebytheendofthecentury，”saidLiuJianguo,oneofthereport'sauthors.Headded,“Thisishowmuchthetemperaturewillriseby2100evenifallcountrieskeeptheirpromisesintheParisAgreement.Butyouknowwhatishappeningaroundtheworld.”Inrecentyears,Chinahasbeentryingitsbesttoprotecttheendangeredpandasbysettingupmoreandbiggernaturereserves(保护区)．“Butitisfarfromenoughandtheendangeredpandasneedcooperationfromtherestoftheworld,becausetheirfutureisnotjustinthehandsoftheChinese，”saidShirleyMartinfromWorldWildlifeFundbutnotamemberoftheteam.TheQinlingMountainsarehometoabout345pandas.Thatisabout18%oftheChina'swildpandapopulation.Inaddition,about375arelivinginresearchcentersandzoosinChina.1．Whatcanwelearnfromthefirstparagraph?A．LotsofthebamboointheQinlingMountainswillprobablydisappear.B．TheQinlingMountainscannotprovideenoughbambooforthepandas.C．PandasintheQinlingMountainsarejustthreatenedwiththelossoffood.D．Pandashavealreadyeaten99%ofthebamboointheQinlingMountains.2．WhatdidLiuJianguomean?A．ChinaneedsmorehelpfromWorldWildlifeFund.B．Thecurrentclimateisnotsuitableforbambooanymore.C．Chinaismakinggreateffortstoprotectthepandas.D．Itisdifficulttopreventthetemperaturefromrisingby3.5℃.3．HowmanywildpandasarethereinChina?A．About345. B．About720.C．About1，900. D．About2，275.4.Whichcanbethebesttitleforthetext?A．TheDisappearanceofBambooB．NecessityofChangingPandas'FoodC．EffortsMadetoSavePandasD．ANewThreatFacedbyPandasBAstudyhasfoundthatalifetimeofregularexerciseandactivitycanslowdowntheagingprocess(衰老过程).Researcherssaythatgettingoldershouldnotnecessarilymeanbecomingweakerorsicker.Theirresearchshowsthatthedevotiontoalifeofmovementandexercisemayhelpuslivenotonlylonger,butalsomorehealthily.Fortheirstudy,theresearchersstudiedtwogroups.Thefirstgroupwasmadeupof125non­professionalcyclistsbetweentheagesof55and79.Thisgroupincluded84healthymenand41healthywomen.Thisgroupwascalledthe“cyclists”．Researchersthenfound130peopletomakeupthesecondgroup.Withinthisgroup,75peoplewereagedfrom57to80.Theother55werebetweentheagesof20and36.Thepeopleinthisgroupwerealsohealthy,buttheydidnotexerciseregularly.Thisgroupwascalledthe“non­exercisers”.Smokers,heavydrinkersofalcoholandpeoplewithotherhealthissueswerenotincludedinthestudy.Then,researchersgavebothgroupsaseriesoftests.Theytestedtheirmusclemass(肌肉质量),muscularstrength,percentageofbodyfatandthestrengthoftheirimmunesystems(免疫系统).Thentheresearcherscomparedtheresultsofthetwogroups.Resultsshowedthatthecyclistsdidnotexperiencebodychangesusuallyregardedasanormalagingprocess.Forexample,theydidnotlosemusclemassormuscularstrength.Also,theirbodyfatdidnotincreasewithage.Theresearchersalsofoundsomethingtheyhadnotexpected.Thestudyshowedthattheimmunesystemsofthecyclistsdidnotageeither.Theresearchersadviseusalltofindtheexercisethatwelikeinourlives.5．Howdidtheresearcherscarryoutthestudy?A．Bycomparison.B．Throughdiscussion.C．Byimagination.D．Byreasoning.6．Whichofthefollowingisaresultoftheresearch?A．Thecyclistskeptthin.B．Thenon­exercisersgainedweighteasily.C．Thecyclists'musclesremainedstrongwithage.D．Thenon­exercisersusuallyhadhealthproblems.7．Whichisanunexpectedresultfortheresearchers?A．Thecyclistshadthenormalagingprocess.B.Thecyclists'immunesystemsdidn'tage.C．Thecyclistslostnearlyalltheirfat.D．Everyoneneededexerciseintheirlives.8．Whichofthefollowingcanbethebesttitleforthetext?A．HealthyPeopleNeedMoreExerciseB．TakeExercise:theHarder,theBetterC．CyclingIstheBestWaytoPreventAgingD．ALifetimeofExerciseSlowstheAgingProcessⅡ.完形填空AsourEarth'stemperaturewarmsupbecauseofclimatechange,itishavingunexpectedeffectsonourworld'sforests.Whentemperaturesrise,treesclosetheirskinsto__1__thelossofwater,andthis,inturn,slowsdownthe__2__ofphotosynthesis(光合作用).Asaresult,thesetreesareshorterandgrowslowly,aswellashavea__3__deathrate.Climatechangealsoincreasesthe__4__ofdroughtsandwildfires.Afterwildfires,ittakesawhilefortheforestsystemsto__5__，andinsomecases,theforestsare__6__permanently.Treesthatarestressedarealso__7__toattacksbybacteria(细菌).Intropicalforests,vinesthatusethetreesas__8__canoftenchokethetreesandrobthemofnutrients.Finally,humanshave__9__theforestlandscapethroughlogging.Whentreesarereplantedonthesoil,theywillnevergrowaslargeasthe__10__treesthatwerecutdown.Astheseforestsdisappear,speciesthatoncecalledthem“home”areforcedtochange,__11__thevarietyofthosesystems.__12__，someendangeredspeciesareunableto__13__anddie.Old­growthforestsaredisappearinginallregionsofourworld.Whenforestsdie,youngerforeststhatarereestablishedinthesameareagrowbackweakerandsmaller__14__poorvegetation(植被).Withtreesdyingincreasinglyandcontinuously,willfuturegenerations__15__outonthewondersofforests?1．A.protect B．preventC．save D．free2．A.movement B．situationC．process D．operation3．A.higher B．firmerC．lighter D．smaller4．A.choice B．measureC．qualification D．chance5．A.grow B．rescueC．recover D．decline6．A.ignored B．lostC．hurt D．left7．A.accessible B．enjoyableC．acceptable D．favorable8．A.attention B．commandC．trust D．support9．A.frightened B．paidC．ruined D．wasted10．A.common B．originalC．distant D．strong11．A.affecting B．improvingC．forgetting D．reflecting12．A.Besides B．SurprisinglyC．Otherwise D．Unfortunately13．A.devote B．keepC．adapt D．lead14．A.dueto B．inadditiontoC．insteadof D．inspiteof15．A.pass B．missC．break D．bring参考答案Ⅰ.阅读理解A【语篇解读】本文是一篇说明文。主要讲述了生活在秦岭的大熊猫可能将面临一个新的威胁：其赖以生存的竹子可能会因为气温升高而消失。1．答案与解析：A考查细节理解。根据第一段的内容可知，秦岭地区大熊猫赖以生存的竹子可能会大量消失。故选A。2．答案与解析：D考查推理判断。根据第三段中他所说的话可知，他认为即使所有国家都严格遵守其在《巴黎协定》中的承诺，到2100年全球气温仍将上升3.5摄氏度。故选D。3．答案与解析：C考查简单计算。根据最后一段中的“TheQinlingMountainsarehometoabout345pandas.Thatisabout18%oftheChina'swildpandapopulation”可得出，中国野生大熊猫总数约为1900只。故选C。4．答案与解析：D考查主旨大意。文章开篇点明主题，秦岭地区的大熊猫可能面临新的威胁——其赖以生存的竹子可能消失。故D项最符合题意。B【语篇解读】本文是一篇说明文。主要讲述了一项研究发现终身规律锻炼可减缓衰老过程。5．答案与解析：A考查推理判断。根据第二段至第六段可知，研究人员设立了两个对比小组并比较了两组的结果，即研究人员通过比较来进行研究。故A选项正确。6．答案与解析：C考查细节理解。根据第五段中的“Resultsshowedthatthecyclistsdidnotexperiencebodychanges...theydidnotlosemusclemassormuscularstrength”可知，研究结果显示，骑自行车的人没有随着年龄的增长而失去肌肉质量和肌肉力量，也就是说骑自行车的人的肌肉依然保持强健。故C选项正确。7．答案与解析：B考查细节理解。根据倒数第二段可知，令研究人员没有想到的是，骑自行车的人的免疫系统也没有老化。故B选项正确。8．答案与解析：D考查主旨大意。根据第一段第一句“Astudyhasfoundthatalifetimeofregularexerciseandactivitycanslowdowntheagingprocess(衰老过程)”以及下文内容可知，本文主要说的是一项研究发现终身有规律地运动可以减