2019高考英语一轮阅读理解巩固练（1）含解析

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1、2019高考英语一轮阅读理解巩固练（1）李仕才AIfyouwanttoslowaging,youmightwanttoeatless.Thisfindingisgoodnews---ifyouwereamouse.Theresearchersstudiedmice,notpeople.JohnPriceandotherresearchersstudiedtwogroupsofmice.Onegroupwasabletoeatasmuchasitwanted.Theresearcherslimitedwh

2、atthemiceintheothergroupate.Theirdiethad35percentfewercaloriesthanthefirstgroupofmice.Pricesaysthemicewiththedietrestrictionswere“moreenergeticandsufferedfewerdisease.”Theywerenotjustlivinglongerbutseemedtostayyoungerforalongerperiodoftime.Theresearchers

3、foundthatfewercaloriesslowdownanaturalmechanismincellscalledribosomes.Priceexplainsthatribosomesareresponsibleformakingimportantproteinsinthecells.Butwithfewercalories,theyslowdown.Thisgivesthecellsmoretimetorepairthemselves.Theresearcherssayribosomesuse

4、from10to20percentofthecell’senergytomakethoseproteins.Pricewrotethat“becauseofthis,itisimpracticaltodestroyanentireribosome”whenitstartstobreakdown.However,“repairingindividualpartsoftheribosomeonaregularbasisenablesribosomestocontinueproducinghighqualit

5、yproteinsforlongerthantheywouldotherwise.Thistopqualityproduction,inturn,keepscellsandtheentirebodyfunctioningwell.”Pricesaid,“ribosomeisaverycomplexmachine,likeacar.”Theyneed“maintenancetoreplacethepartsthatwearoutthefastest.Whentireswearout,”heexplaine

6、d,“youdon’tthrowthewholecarawayandbuyanewone.Itcostslesstoreplacetheoldtires.”“Food,”hesaid,“isn’tjustmaterialtobeburned---it’sasignalthattellsourbodyandcellshowtorespond.”Pricesaidthefindingshelptoexplainhowexactlyourbodiesage.Andthismay“helpusmakemoree

7、ducateddecisionsaboutwhatweeat.”1.Whatcanweknowaboutthemicewithlimitedcaloriesfromthestudy?A.TheycankeephealthyeasilyB.TheyneedmoreenergytobeactiveC.TheycanlookyoungerthantheyareD.Theywilllivealongerlifelikehumans2.Whatwillhappentoribosomesiftherearefewe

8、rcalories?A.TheywillcompletelybreakdownB.TheymakeproteinsinthecellsslowlyC.TheywillproducehighqualityproteinsmoreD.Theymayneedmoretimetorepairthemselves3.Priceexplainedtheribosomes’roleofrepairingthemselvesby_________.A.te