2019高考英语一轮复习 unit 2 language 牛津译林版必修3

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1、Unit2Language一、阅读理解Ifyouwanttoslowaging,youmightwanttoeatless.Thisfindingisgoodnews---ifyouwereamouse.Theresearchersstudiedmice,notpeople.JohnPriceandotherresearchersstudiedtwogroupsofmice.Onegroupwasabletoeatasmuchasitwanted.Theresearcherslimitedwhatthemiceintheothergroup

2、ate.Theirdiethad35percentfewercaloriesthanthefirstgroupofmice.Pricesaysthemicewiththedietrestrictionswere“moreenergeticandsufferedfewerdisease.”Theywerenotjustlivinglongerbutseemedtostayyoungerforalongerperiodoftime.Theresearchersfoundthatfewercaloriesslowdownanaturalmecha

3、nismincellscalledribosomes.Priceexplainsthatribosomesareresponsibleformakingimportantproteinsinthecells.Butwithfewercalories,theyslowdown.Thisgivesthecellsmoretimetorepairthemselves.Theresearcherssayribosomesusefrom10to20percentofthecell’senergytomakethoseproteins.Pricewro

4、tethat“becauseofthis,itisimpracticaltodestroyanentireribosome”whenitstartstobreakdown.However,“repairingindividualpartsoftheribosomeonaregularbasisenablesribosomestocontinueproducinghighqualityproteinsforlongerthantheywouldotherwise.Thistopqualityproduction,inturn,keepscel

5、lsandtheentirebodyfunctioningwell.”Pricesaid,“ribosomeisaverycomplexmachine,likeacar.”Theyneed“maintenancetoreplacethepartsthatwearoutthefastest.Whentireswearout,”heexplained,“youdon’tthrowthewholecarawayandbuyanewone.Itcostslesstoreplacetheoldtires.”“Food,”hesaid,“isn’tju

6、stmaterialtobeburned---it’sasignalthattellsourbodyandcellshowtorespond.”Pricesaidthefindingshelptoexplainhowexactlyourbodiesage.Andthismay“helpusmakemoreeducateddecisionsaboutwhatweeat.”1.Whatcanweknowaboutthemicewithlimitedcaloriesfromthestudy?A.TheycankeephealthyeasilyB.

7、TheyneedmoreenergytobeactiveC.TheycanlookyoungerthantheyareD.Theywilllivealongerlifelikehumans2.Whatwillhappentoribosomesiftherearefewercalories?A.TheywillcompletelybreakdownB.TheymakeproteinsinthecellsslowlyC.TheywillproducehighqualityproteinsmoreD.Theymayneedmoretimetore

8、pairthemselves3.Priceexplainedtheribosomes’roleofrepairingthemselvesby_________.A.telling