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ID:35879498
大小:36.74 KB
页数:11页
时间:2019-04-21
《2019高考英语一轮阅读理解巩固练(1)含解析》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
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
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