雅思阅读实战训练模拟试题（一）

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1、精品文档雅思阅读实战训练模拟试题（一）雅思阅读实战训练模拟试题（一）★TimetocoolitDec13th2006FromTheEconomistprintedition1REFRIGERATORSaretheepitomeofclunkytechnology:solid,reliableandjustalittlebitdull.Theyhavenotchang★TimetocoolitDec13thFromTheEconomistprintedition1REFRIGERATORSaretheepitomeofclunkytechnology:s

2、olid,reliableandjustalittlebitdull.Theyhavenotchangedmuchoverthepastcentury,butthentheyhavenotneededto.Theyarebasedonarobustandeffectiveidea--drawheatfromthethingyouwanttocoolbyevaporatingaliquidnexttoit,andthendumpthatheatbypumpingthevapourelsewhereandcondensingit.Thismethodofp

3、umpingheatfromoneplacetoanotherservedmankindwellwhenrefrigerators’mainjobswerepreservingfoodand,asairconditioners,coolingbuildings.Today’shigh-techworld,however,demandshigh-techrefrigeration.Heatpumpsarenolongeruptothejob.Thesearchisonforsomethingtoreplace2016全新精品资料-全新公文范文-全程指导写

4、作–独家原创16/16精品文档them.2Onesetofcandidatesareknownasparaelectricmaterials.Theseactlikebatterieswhentheyundergoatemperaturechange:attachelectrodestothemandtheygenerateacurrent.Thiseffectisusedininfra-redcameras.Anarrayoftinypiecesofparaelectricmaterialcansensetheheatradiatedby,forex

5、ample,aperson,andthepatternofthearray’selectricaloutputscanthenbeusedtoconstructanimage.Butuntilrecentlynoonehadbotheredmuchwiththeinverseofthisprocess.Thatinverseexists,however.Applyanappropriatecurrenttoaparaelectricmaterialanditwillcooldown.3Someonewhoislookingatthisinverseef

6、fectisAlexMischenko,ofCambridgeUniversity.Usingnetmerciallyavailableparaelectricfilm,heandhiscolleagueshavegeneratedtemperaturedropsfivetimesbiggerthananypreviouslyrecorded.Thatmaybeenoughtochangethephenomenonfromalaboratorycuriositytosomethingwithnetmercialapplications.2016全新精品

7、资料-全新公文范文-全程指导写作–独家原创16/16精品文档4Astowhatthoseapplicationsmightbe,DrMischenkoisstillalittlehazy.Hehas,nevertheless,setupanetpanytopursuethem.Heforeseesputtinghisdiscoverytouseinmoreefficientdomesticfridgesandairconditioners.Therealmoney,though,maybeincoolingnetputers.5Gadgetsconta

8、iningmicroprocessorshavebeengettinghotterforalo