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1、2012屆上海市高三二模英語試卷——C篇(崇明)(C)Lotsofbacteriacangrowintheseeminglyunfriendlyenvironmentunderglaciers(冰川),aregionformerlyconsideredfreeofmuchbiology.ThisfindingbyglaciologistsworkinginSwitzerlandcouldhelpsolvesomepuzzlesofthelasticeageandpointthewayforfindinglifeonotherplanets.Bacteri
2、awithoddlifestyleshavebeenunderincreasingstudylately,withmostresearchfocusedonthespecieswhichpreferhothomes.Thenewstudyshiftsattentiontotheotherendofthethermometer(溫度計(jì)).Theexcitingthingistheideaofpushingthewindowofacceptablebacterialenvironmentsalittlebitfartheropen.Researchersha
3、vepreviouslycollectedsmallnumbersofbacteriafromiceinAntarcticaandGreenland,buttheycouldnotdeterminewhetherthesewereactivebacteriaorjustfrozencellsblowninbywind.Incontrast,theearthbeneathtwoSwissglaciersharborslargecoloniesofbacteria—hundredsofmillionsofcellspergram—thatappeartobe
4、growingat0℃.Scientistsfolloweduponthesefindingsbytakingsamplesofice,water,andearthattwomountainglaciers.Theyfoundthatearthbeneaththeglacierscontainedmuchlargerpopulationsofbacteriathandidsurfaceandinnerpartofice.Thosefindingsindicatethatthebacteriaweregrowingatthebottomoftheglaci
5、erandarenotsomethingwashedinwhilethescientistsdrilledthroughtheice.Lookingatthebacteriaunderamicroscope(顯微鏡),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
