雅思阅读模拟题精选及答案解析(1)

  • 来源:本站
  • 发布时间:2019-08-08
  • 55已阅读
您现在的位置:首页 >> 西方诗歌 >> 文章
简介 FromTheEconomistprintedition 1REFRIGERATORSaretheepitomeofclunkytechnology:solid,,anttocoolby

雅思阅读模拟题精选及答案解析(1)

  FromTheEconomistprintedition  1REFRIGERATORSaretheepitomeofclunkytechnology:solid,,anttocoolbyevaporatingaliquidnexttoit,enrefrigeratorsmainjobswerepreservingfoodand,asairconditioners,shigh-techworld,however,  :dby,forexample,aperson,andthepatternofthearray,wn.  3SomeonewhoislookingatthisinverseeffectisAlexMischenko,,heandhiscolleagueshavegeomethingwithcommercialapplications.  4Astowhatthoseapplicationsmightbe,,nevertheless,,though,maybeincoolingcomputers.  5GasLaw,whichdescribesthedoublingofthenumberoftransistorsonachipevery18months,,itmorethandoubles,becausebesidesincreasinginnumber,processor,sothefastertheprocessoris,scompany,Intel,in1993,"single-core"  6Disposingoft℃.At85℃,sheatsinks(copperoraluminiumboxesdesignedtoradiateheataway)edprocessingpowerbetweenfirsttwo,andthenfour,subunits,inordertospreadthethermalload,alsoseemstohavetheendoftheroadinsight.  7Onewayoutofthismaybeasecondcuriousphysicalphenomenon,,thisgeneratesele,asignificantbodyofresearchersisalreadyworkingonit.  8Thetricktoagoodthermoelectricmaterialisacrystalstructureinwhichelectronscanflowfreely,butthepathofphonons--heat-carryi,thistrickishardtopulloff,andthermoelectricmaterialsarethuslessefficientthanparaelectricones(or,atleast,thanthoseexaminedbyDrMischenko).Nevertheless,RamaVenkatasubramanian,ofNextremeThermalSolutionsinNorthCarolina,claimstohavemadethermoelectricrefrigeratorsthatcansitonthebackofcomputerchipsandcoolhotspotsby10℃.AliShakouri,oftheUniversityofCalifornia,SantaCruz,sayshisareevensmaller--sosmallthattheycangoinsidethechip.  9Thelastwordincomputercooling,though,maygotoasyspumpedthroughlittlechannelsintheprocessor,andthencetoaradiator,,IBMsresearchlaboratoryinZurichisexperimentingwithtinyjetsthatstirtheliquidupandthusmakesureallofiteventuallytouch,therefore,acombinationofmicroch,asitwere,handinhandwiththenew.  (830words)  Questions1-5  Completeeachofthefollowingstatementswiththescientistorcompanynamefromtheboxbelow.  WritetheappropriatelettersA-Finboxes1-5onyouranswersheet.              1....andhisresearchgroupuseparaelectricfilmavailablefromthemarkettoproducecooling.  2....soldmicroprocessorsrunningat60mcyclesasecondin1993.  3....saysthathehasmaderefrigeratorswhichcancoolthehotspotsofcomputerchipsby10℃.  4....claimstohavemadearefrigeratorsmallenoughtobebuiltintoacomputerchip.  5....attemptstoproducebettercoolinginpersonalcomputersbystirringupliquidwithtinyjetstomakesuremaximumheatexchange.  Questions6-9  Dothefollowingstatementsagreewiththeinformationgiveninthereadingpassage  Inboxes6-9onyouranswersheetwrite  TRUEifthestatementistrueaccordingtothepassage  FALSEifthestatementisfalseaccordingtothepassage  NOTGIVENiftheinformationisnotgiveninthepassage  edtothem.  uringmoreefficientreferigerators.  blestheheatoutput.  paraelectrics.  Question10  ChoosetheappropriatelettersA-Dandwritetheminbox10onyouranswersheet.      抯heatsinks.      Questions11-14  Completethenotesbelow.  ChooseonesuitablewordfromtheReadingPassageaboveforeachanswer.  Writeyouranswersinboxes11-14onyouranswersheet.  Traditionalrefrigeratorsuse...11...,scientistsaresearchingforothermethodstoproducerefrigeration,especiallyincomputermicroprocessors....12...materialshavebeentriedtogeneratetemperaturedropsfivetimesbiggerthananypreviouslyrecorded....13...eff..14...mayalsobeasystemtorealizeidealcomputercoolinginthefuture.  KeyandExplanations:    SeeParagraph3:...AlexMischenko,,heandhiscolleagueshavegeneratedtemperaturedrops...    SeeParagraph5:ThefirstPentiumchipssoldbyDrMoorescompany,Intel,in1993,ranat60mcyclesasecond.    SeeParagraph8:...RamaVenkatasubramanian,ofNextremeThermalSolutionsinNorthCarolina,claimstohavemadethermoelectricrefrigeratorsthatcansitonthebackofcomputerchipsandcoolhotspotsby10℃.    SeeParagraph8:AliShakouri,oftheUniversityofCalifornia,SantaCruz,sayshisareevensmaller梥osmallthattheycangoinsidethechip.    SeeParagraph9:Toimproveonthis,IBMsresearchlaboratoryinZurichisexperimentingwithtinyjetsthatstirtheliquidupandthusmakesureallofiteventuallytouchestheoutsideofthechannel--thepartwheretheheatexchangetakesplace.    SeeParagraph2:...:attachelectrodestothemandtheygenerateacurrent.    SeeParagraph3(Thatmaybeenoughtochangethephenomenonfromalaboratorycuriositytosomethingwithcommercialapplications.)andParagraph4(Astowhatthoseapplicationsmightbe,,nevertheless,s    SeeParagraph5:Heatisreleasedeverytimealogicaloperationisperformedinsideamicroprocessor,sothefastertheprocessoris,    SeeParagraph9:Inthefuture,therefore,acombinationofmicrochannelsandeitherthermoelectricsorparaelectricsmightcoolcomputers.    SeeParagraph6:Tweakingtheprocessortohavetheendoftheroadinsight.    SeeParagraph1:Todayshigh-techworld,however,    SeeParagraph3:Usingcommerciallyavailableparaelectricfilm,heandhiscolleagueshavegeneratedtemperaturedropsfivetimesbiggerthananypreviouslyrecorded.    SeeParagraph7:...,thisgeneratesele,asignificantbodyofresearchersisalreadyworkingonit.    SeeParagraph9:Thelastwordincomputercooling,though,maygotoasystemevenlesstechythanaheatpump--aminiatureversionofacarradiator.以上就是本文的全部内容,更多精彩请随时关注官网。