2019-2020年高考英语二轮复习 阅读理解训练（5）

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1、2019-2020年高考英语二轮复习阅读理解训练（5）【xx高考英语湖北省汉阳市联考试题】400-year-oldplantsfromtheLittleIceAgewerebroughtbacktolife,whichcouldhelpusunderstandhowtheEarthwilldealwithclimatechange.Moss(藓类植物)foundburiedbeneaththeTeardropglacier(冰川)onEllesmereIslandinCanadahasbeenbroughtbacktolife.Fin

2、dingssuggestthattheseplantscouldhelprepopulateregionsexposedbymeltingicecaps.PlantsthatwereburiedbeneaththickiceinCanadamorethan400yearsagoandwerethoughttohavefrozentodeathhavebeenbroughtbacktolifebyCanadianscientists.Samplesofthemossplant,coveredbytheglacierduringtheLi

3、ttleIceAgeof1550to1850AD,werereplantedinalabattheUniversityofAlbertaandgrewnewstems(茎).Researchersnowthinkthesefindingscangiveindicationastohowregionscanrecoverastheicecoveringthemmelts.BiologistDr.CatherineLaFargeandherteamattheUniversityofAlbertawereexploringtheregion

4、aroundtheTeardropglacieronEllesmereIsland.IceonEllesmereIslandregionhasbeenmeltingataroundfourmeterseachyearforthepastnineyears.Thismeansthatmanyareasoflandthatwerepreviouslycoveredbyicehavesincebeenexposed.ManyecosystemsthatwerethoughttohavebeendestroyedduringtheLittle

5、IceAgebetween1550and1850ADcannowbestudied,includingmanyspeciesthathaveneverbeenstudiedbefore.Whileexamininganexposedareaofland,LaFargeandherteamdiscoveredasmallareaofmosscalledAulaniumturgidum.Itisatypeofbryophyte(苔藓类植物)plantthatmainlygrowsacrossCanada,theUSandtheHighla

6、ndsofScotland.DrLaFargenoticedthatthemosshadsmallpatchesofgreenstems,suggestingitiseithergrowingagainorcanbeencouragedtorepopulate.DrLaFargetoldtheBBC,“Whenwelookedatthesamplesindetailandbroughtthemtothelab,Icouldseesomeofthestemsactuallyhadnewgrowthofgreenbranches,sugg

7、estingthattheseplantsaregrowingagain,andthatblewmymind.Whenwethinkofthickareasoficecoveringthelandscape,we’vealwaysthoughtthatplantshavetoefromrefugia(濒绝生物保护区),neverconsideringthatlandplantsefromunderneathaglacier.It’sawholeworldofwhat’singoutfromunderneaththeglaciertha

8、treallyneedstobestudied.Theiceisdisappearingprettyfast.Wereallyhavenotexaminedallthebiologicalsystemsthatexist