12六级真题试题.docx
《12六级真题试题.docx》由会员分享,可在线阅读,更多相关《12六级真题试题.docx(17页珍藏版)》请在冰豆网上搜索。
12六级真题试题
2007年12月大学英语六级考试真题
PartIWriting(30minutes)
Directions:
Forthispart,youareallowed30minutestowriteashortessayentitledDigitalAge.Youshouldwriteatleast150wordsfollowingtheoutlinegivenbelow.
1.如今数字化产品得到越来越广泛的使用,并举例
2.数字化产品的使用对人工作,学习,生活产生的影响
DigitalAge
________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
PartIIReadingComprehension(SkimmingandScanning)(15minutes)
Directions:
Inthispart,youwillhave15minutestogooverthepassagequicklyandanswerthequestionsonAnswerSheet1.
Forquestions1-7,choosethebestanswerfromthefourchoicesmarked[A],[B],[C]and[D].
Forquestions8-10,completethesentenceswiththeinformationgiveninthepassage.
SevenWaystoSavetheWorld
Forgettheoldideathatconservingenergyisaformofself-denial—ridingbicycles,dimmingthelights,andtakingfewershowers.Thesedaysconservationisallaboutefficiency:
gettingthesame—orbetter—resultsfromjustafractionoftheenergy.WhenaslumpinbusinesstravelforcedUlrichRǒmertocutcostcostsathisfamily-ownedhotelinGermany,hereplacedhundredsofthehotel’swastefullightbulbs,gettingthesamelightfor80percentlesspower.Heboughtanewwaterboilerwithadigitallycontrolledpump,andwrappedinsulationaroundthepipes.Spendingabout€100,000ontheseandotherimprovements,heslashedhis€90,000fuelandpowerbillby€60,000.Asabonus,thehotel’slowerenergyneedshavereduceditsannualcarbonemissionsbymorethan200metrictons.“Forus,savingenergyhasbeenvery,veryprofitable,”hesays.“Andmostimportantly,we’renotgivingupasinglecomfortforourguests.”
Efficiencyisalsoagreatwaytolowercarbonemissionsandhelpslowglobalwarming.Butthebestargumentforefficiencyisitscost—or,moreprecisely,itsprofitability.That’sbecausequicklygrowingenergydemandrequiresimmenseinvestmentinnewsupply,nottomentionthedrainofrisingenergyprices.
Nowonderefficiencyhasmovedtothetopofthepoliticalagenda.OnJan.10,theEuropeanUnionunveiledaplantocutenergyuseacrossthecontinentby20percentby2020.LastMarch,Chinaimposeda20percentincreaseinenergyefficiencyby2020.EvenGeorgeW.Bush,theTexasoilman,isexpectedtotalkaboutenergyconversationinhisStateoftheUnionspeechthisweek.
Thegoodnewsisthattheworldisfullofproven,cheapwaystosaveenergy.Herearetheseventhatcouldhavethebiggestimpact:
Insulate
Spaceheatingandcoolingeatsup36percentofalltheworld’senergy.There’svirtuallynolimittohowmuchofthatcanbesaved,asprototype“zero-energyhomes”inSwitzerlandandGermanyhaveshown.There’sbeenasurgeinnewwaysofkeepingheatinandcoldout(orviceversa).Themostadvancedinsulationfollowsthelawofincreasingreturns:
ifyouaddenough,youcanscaledownoreveneliminateheatingandair-conditioningequipment,loweringcostsevenbeforeyoustartsavingonutilitybills.Studieshaveshownthatgreenworkplaces(onesthatdon’tconstantlyneedtohavetheheatorair-conditionerrunning)havehigherworkerproductivityandlowersickrates.
ChangeBulbs
Lightingeatsup20percentoftheworld’selectricity,ortheequivalentofroughly600,000tonsofcoaladay.Fortypercentofthatpowersold-fashionedincandescentlightbulbs—a19th-centurytechnologythatwastesmostofthepoweritconsumesonunwantedheat.
Compactfluorescentlamps,orCFLs,notonlyuse75to80percentlesselectricitythanincandescentbulbstogeneratethesameamountoflight,buttheyalsolast10timeslonger.Phasingoldbulbsoutby2030wouldsavetheoutputof650powerplantsandavoidthereleaseof700milliontonsofcarbonintotheatmosphereeachyear.
ComfortZone
Waterboilers,spaceheatersandairconditionershavebeennotoriouslyinefficient.Theheatpumphasalteredthatequation.Itremovesheatfromtheairoutsideorthegroundbelowandusesittosupplyheattoabuildingoritswatersupply.Inthesummer,thesystemcanbereversedtocoolbuildingaswell.
MostnewresidentialbuildingsinSwedenarealreadyheatedwithground-sourceheatpumps.Suchsystemsconsumealmostnoconventionalfuelatall.Severalcountrieshaveusedsubsidiestojump-startthemarket,includingJapan,wherealmost1millionheatpumpshavebeeninstalledinthepasttwoyearstoheatwaterforshowersandhottubs.
RemakeFactories
Fromsteelmillstopaperfactories,industryeatsupaboutathirdoftheworld’senergy.Theopportunitiestosavearevast.InLudwigshafen,GermanchemicalsgiantBASFrunsaninterconnectedcomplexofmorethan200chemicalfactories,where