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.com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.Resu...