2012年職稱英語理工類第30講 閱讀理解(十二)(2012年新版)

1、第六篇EatEattotoLiveLiveAmeagerdietmaygiveyouhealthlonglifebutitsnotmuchfunitmightnotevenbenecessary.Wemaybeabletohangonto1mostofthatyouthfulvigevenifwedontstarttodietuntiloldage.StephenSpindlerhiscolleaguesfromtheUniversit

2、yofCalifniaatRiversidehavefoundthatsomeofanelderlymouseslivergenescanbemadetobehaveastheydidwhenthemousewasyoungsimplybylimitingitsfoodffourweeks.Thegeicrejuvenationwontreverseotherdamagecausedbytimefthemousebutcouldhelp

3、itslivermetabolizedrugsgetridoftoxins2.Spindlersteamfedthreemiceanmaldietftheirwholelivesfedanotherthreeonhalfrations3.Threememicewereswitchedfromthenmaldiettohalffeed3famonthwhentheywere34monthsoldequivalenttoabout70hum

4、anyears.Theresearcherscheckedtheactivityof11000genesfromthemouseliversfoundthat46changedwithageinthenmallyfedmice.Thechangeswereassociatedwiththingslikeinflammationfreeradicalproduction4probablybadnewsfmousehealth.Inthem

5、icethathaddietedalltheirlives27ofthose46genescontinuedtobehavelikeyounggenes.Butthemostsurprisingfindingwasthatthemicethatonlystarteddietinginoldagealsobenefitedfrom70percentofthesegenechanges.“Thisisthefirstindicationth

6、attheseeffectskickin5prettyquickly“saysHuberWarnerfromtheNationalInstituteonAgingnearWashingtonD.C.NooneyetknowsifcalierestrictionwksinpeopleasitdoesinmicebutSpindlerishopeful.“Theresattractingtemptingevidenceouttheretha

7、titwillwk“hesays.Ifitdoeswkinpeopletheremightbegoodreasonsfrejuvenatingtheliver.Aswegetolderourbodiesarelessefficientatmetabolizingdrugsfexample.AbriefperiodoftimeofdietingsaysSpindlercouldbeenoughtomakesureadrugiseffect

8、ive.ButSpindlerisntsurethetradeoffiswthit6“Themicegetlessdiseasetheylivelongerbuttheyrehungry“hesays.“Evenseeingwhatadietdoesitsstillhardtogotoarestaurantsay:Icanonlyeathalfofthat.“Spindlerhopeswesoonwontneedtodietatall.

9、HiscompanyLifeSpanGeicsinCalifniaislookingfdrugsthathavetheeffectsofcalierestriction.詞匯：D)Wehavetobegindietingfromchildhood.2.Whydoestheauthmentionanelderlymouseinparagraph2A)Todescribetheinfluenceofoldageonmice.B)Toillu

10、stratetheeffectofmeagerfoodonmice.C)Totellushowmiceslivergenesbehave.D)Toinfmusoftheprocessofmetabolizingdrugs.3.WhatcanbeinferredaboutcompletelynmallyfedmicementionedinthepassageA)Theywillnotexperiencefreeradicalproduct

11、ion.B)Theywillexperiencemegeicrejuvenationintheirlifetime.C)Theyhavemeoldlivergenestobehavelikeyounggenes.D)Theyaremelikelytosufferfrominflammation.4.AccdingtotheauthwhichofthefollowingmostinterestedtheresearchersA)Themi

12、cethatstarteddietinginoldage.B)27ofthose460ldgenesthatcontinuedtobehavelikeyounggenes.C)Calierestrictionthatwksinpeople.D)Dietingthatmakessureadrugiseffective.5.AccdingtothelasttwoparagraphsSpindlerbelievesthatA)calieres

13、trictionisveryimptanttoyoungpeople.B)seeingtheeffectofadietpeoplewilleatlessthannmal.C)dietingisnotagoodmethodtogiveushealthalonglife.D)drugsdonothavetheeffectsofcalierestriction.答案與題解：1D第一段第一句講‘‘節(jié)食可能不是非做不可的事”，第二句講“即使上了年

14、紀(jì)再節(jié)食，我們?nèi)匀挥锌赡茉诤艽蟪潭壬媳３智啻夯盍Α?，因此，“我們必須從小就開始節(jié)食”是錯(cuò)誤的，D是答案。2B第二段提及“一只高齡老鼠”的時(shí)候，作者談到，“只要連續(xù)四周限制它進(jìn)食，它的肝臟基因就會(huì)變得和衰老前一樣充滿活力”。據(jù)此，“為了描述節(jié)食對(duì)老鼠所產(chǎn)生的影響”最好地回答了題干中的問題。3D第四段提到，“正常飼養(yǎng)的老鼠隨著年齡的增長有46條肝臟基因會(huì)發(fā)生變化，這種變化與炎癥和身體組織無限激增相關(guān)”，因此，D正確。4.A第四段最后一個(gè)句子