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首页 2007年12月六级真题.doc

2007年12月六级真题.doc

2007年12月六级真题.doc

于敏熙 2017-10-17 评分 0 浏览量 0 0 0 0 暂无简介 简介 举报

简介:本文档为《2007年12月六级真题doc》,可适用于高等教育领域,主题内容包含年月六级真题ÊÓÃÊýÖúÆÔÓÚÈËÃÇÑϺÍÉúîµÄÓÏìPartIIReadingComprehension(SkimmingandSca符等。

年月六级真题ÊÓÃÊýÖúÆÔÓÚÈËÃÇÑϺÍÉúîµÄÓÏìPartIIReadingComprehension(SkimmingandScanning)(minutes)SevenwaytoSavetheWorldForgettheoldideathatconservingenergyisaformofselfdenialªridingbicycles,dimmingthelights,andtakingfewershowersThesedaysconservationisallaboutefficiency:gettingthesameªorbetterªresultsfromjustafractionoftheenergyWhenaslumpinbusinesstravelforcedUlrichRamertocutcostsathisfamilyªownedhotelinGermany,hereplacedhundredsofthehotelswastefullightbulbs,gettingthesamelightforpercentlesspowerHeboughtanewwaterboilerwithadigitallycontrolledpump,andwrappedinsulationaroundthepipesSpendingaboutê,ontheseandotherimprovements,heslashedhisê,fuelandpowerbillbyê,Asabonus,thehotelslowerenergyneedshavereduceditsannualcarbonemissionsbymorethanmetrictonsForus,savingenergyhasbeenvery,veryprofitable,hesaysAndmostimportantly,werenotgivingupasinglecomfortforourguestsEfficiencyisalsoagreatwaytolowercarbonemissionsandhelpslowglobalwarmingButthebestargumentforefficiencyisitscostªor,moreprecisely,itsprofitabilityThatsbecauseuicklygrowingenergydemandreuiresimmenseinvestmentinnewsupply,nottomentionthedrainofrisingenergypricesNowonderefficiencyhasmovedtothetopofthepoliticalagendaOnJan,theEuropeanUnionunveiledaplantocutenergyuseacrossthecontinentbypercentbyLastMarch,ChinaimposedapercentincreaseinenergyefficiencybyEvenGeorgeWBush,theTexasoilman,isexpectedtotalkaboutenergyconservationinhisStateoftheUnionspeechthisweekThegoodnewsisthattheworldisfullofproven,cheapwaystosaveenergyHerearetheseventhatcouldhavethebiggestimpactInsulateSpaceheatingandcoolingeatsuppercentofalltheworldsenergyTheresvirtuallynolimittohowmuchofthatcanbesaved,asprototypezeroenergyhomesinSwitzerlandandGermanyhaveshownTheresbeenasurgeinnewwaysofkeepingheatinandcoldout(orviceversa)Themostadvancedinsulationfollowsthelawofincreasingreturns:ifyouaddenoughyoucanscaledownoreveneliminateheatingandairconditioningeuipment,loweringcostsevenbeforeyoustartsavingonutilitybillsStudieshaveshownthatgreenworkplaces(onesthatdontconstantlyneedtohavetheheatorairconditionerrunning)havehigherworkerproductivityandlowersickratesChangeBulbsLightingeatsuppercentoftheworldselectricity,ortheeuivalentofroughly,tonsofcoaladayFortypercentofthatpowersoldfashionedincandescentlightbulbsªathcenturytechnologythatwastesmostofthepoweritconsumesonunwantedheatCompactfluorescentlamps,orCFLS,notonlyusetopercentlesselectricitythanincandescentbulbstogeneratethesameamountoflight,buttheyalsolasttimeslongerPhasingoldbulbsoutbywouldsavetheoutputofpowerplantsandavoidthereleaseofmilliontonsofcarbonintotheatmosphereeachyearComfortZoneWaterboilers,spaceheatersandairconditionershavebeennotoriouslyinefficientTheheatpumphasalteredthateuationItremovesheatfromtheairoutsideorthegroundbelowandusesittosupplyheattoa

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