小学、初中、高中各种试卷真题知识归纳文案合同PPT等免费下载www.doc985.com课时作业(一)Unit1SectionⅠWelcometotheunit&ReadingⅠ.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．ANewThreatFacedbyPandas小学、初中、高中各种试卷真题知识归纳文案合同PPT等免费下载www.doc985.comBAstudyhasfoundthatalifetimeofregularexerciseandactivitycanslowdowntheagingprocess(衰老过程).Researcherssaythatgettingoldershouldnotnecessarilymeanbecomingweakerorsicker.Theirresearchshowsthatthedevotiontoalifeofmovementandexercisemayhelpuslivenotonlylonger,butalsomorehealthily.Fortheirstudy,theresearchersstudiedtwogroups.Thefirstgroupwasmadeupof125non-professionalcyclistsbetweentheagesof55and79.Thisgroupincluded84healthymenand41healthywomen.Thisgroupwascalledthe“cyclists”．Researchersthenfound130peopletomakeupthesecondgroup.Withinthisgroup,75peoplewereagedfrom57to80.Theother55werebetweentheagesof20and36.Thepeopleinthisgroupwerealsohealthy,buttheydidnotexerciseregularly.Thisgroupwascalledthe“non-exercisers”.Smokers,heavydrinkersofalcoholandpeoplewithotherhealthissueswerenotincludedinthestudy.Then,researchersgavebothgroupsaseriesoftests.Theytestedtheirmusclemass(肌肉质量),muscularstrength,percentageofbodyfatandthestrengthoftheirimmunesystems(免疫系统).Thentheresearcherscomparedtheresultsofthetwogroups.Resultsshowedthatthecyclistsdidnotexperiencebodychangesusuallyregardedasano...