2012届上海市高三二模英语——阅读C篇

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1、2012届上海市高三二模英语试卷——C篇(崇明)(C)Lotsofbacteriacangrowintheseeminglyunfriendlyenvironmentunderglaciers(冰川),aregionformerlyconsideredfreeofmuchbiology.ThisfindingbyglaciologistsworkinginSwitzerlandcouldhelpsolvesomepuzzlesofthelasticeageandpointthewayforfindinglifeonotherplanets.Bacteri

2、awithoddlifestyleshavebeenunderincreasingstudylately,withmostresearchfocusedonthespecieswhichpreferhothomes.Thenewstudyshiftsattentiontotheotherendofthethermometer(温度计).Theexcitingthingistheideaofpushingthewindowofacceptablebacterialenvironmentsalittlebitfartheropen.Researchersha

3、vepreviouslycollectedsmallnumbersofbacteriafromiceinAntarcticaandGreenland,buttheycouldnotdeterminewhetherthesewereactivebacteriaorjustfrozencellsblowninbywind.Incontrast,theearthbeneathtwoSwissglaciersharborslargecoloniesofbacteria—hundredsofmillionsofcellspergram—thatappeartobe

4、growingat0℃.Scientistsfolloweduponthesefindingsbytakingsamplesofice,water,andearthattwomountainglaciers.Theyfoundthatearthbeneaththeglacierscontainedmuchlargerpopulationsofbacteriathandidsurfaceandinnerpartofice.Thosefindingsindicatethatthebacteriaweregrowingatthebottomoftheglaci

5、erandarenotsomethingwashedinwhilethescientistsdrilledthroughtheice.Lookingatthebacteriaunderamicroscope(显微镜),theresearchersfoundthatmanywereintheprocessofdividing,andhealthyundertheice.Thebacteriamightbreakdownmineralsandplantremainsoriginallyburiedbeneaththeglacierorlaterwashedi

6、nbywatergoingslowlythroughtheice,scientistssay.“Someoftheassumptionswehavemadeinthepastnowmustbeseriouslyquestioned,”sayresearchers.“IfbacteriacanliveunderglaciersonEarth,whynotonotherplanets?Thenewstudypointsoutinmanywaysthatthebottomsofglaciersareprobablyquitegoodenvironmentsfr

7、omthepointofviewofbacteria.So,maybethebottomoftheicesheetsonotherplanetswouldbeasensibleplacetotryifyou’regoingtolookforlifeonthem.”72.Whatisspecialaboutthenewstudyonbacteria?A.Itfocusesonthebacteriainhotenvironments.B.Itopensthewindowsofthebacteriallabswider.C.Itpaysmoreattentio

8、ntothebacteriainthethermometer.D.Itchang