2015中石油职称英语阅读题：hydrogencars原文及答案

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1、HydrogenCarsARecordgaspricesaremakingroadtripsmoreexpensivethanever.Butwhatif,insteadofgas,yourcarranonthemostabundantelementinouruniverse?Manyexpertsthinkhydrogenwillreplacepetrol,dieselandnaturalgasasthemainfuelforcars,busesandtrucksoverthenextfewdeca

2、des.Alreadycarmanufacturersaroundtheworldhaveinvestedbillionsofdollarsinresearchanddevelopment・BTheadvantagesofhydrogenareenormous:nomoresmog-formingexhaustgases,nomorecarbondioxideemissionsthatcontributetoglobalwarming,nomoreworriesaboutdiminishingoils

3、uppliesandrisingprices.Butsometrickyquestionsneedtobeansweredbeforemass・producedhydrogencarsstartappearingonthestreets・Wherewillthehydrogencomefrom?Howwillmotoristsfillup?Howwillcarsstorethefuel?Andthere'salsothequestionofhowbesttotaptheenergyinthefuelf

4、orgood,on-roadperformanee.cTwokindsofenginescanusehydrogenasafuel;thosethathaveaninternalcombustionengineconvertedtouseitandthosethataremadeupofastackoffuelcells.Internalcombustionengineshavepoweredcarssincetheyfirstbegantoreplacehorse-drawncarriagesmor

5、ethan100yearsago.Theseenginescanbeconvertedtorunonavarietyoffuels,ineludinghydrogen.However;mostcarmakersthinkthatfuelcellspoweringanelectricmotorofferabetteralternative・Unlikeheavybatteriesthatneedfrequentrecharging,fuelcellsmakeelectricityastheygo.Rec

6、entdevelopmentsintechnologytoohavesubstantiallyincreasedtheamountofpowerthatastackofcellscanprovide.Thishasopeneduptheprospectofefficient,non-pollutingelectriccars.DFuelcelltechnologysoundssimple.Thehydrogenfuelreactswithoxygenfromtheairtoproducewateran

7、delectricity,thereverseofthefamiliarelectrolysisprocessthatreleasesoxygenandhydrogenfromwater.Inrealityofcourseit'sabitmorecomplicated・Thebigadvantageofafuelcellengineoveraninternalcombustionenginerunningonhydrogenisitsgreaterefficiency.Thesameamountofh

8、ydrogenwilltakeafuelcellcaratleasttwiceasfarasonewithaconvertedinternalcombustionengine・EHydrogenhasnumerousadvantagesasafuelforvehicles,butabigdisadvantageisthatitisdifficulttostore・Thisisbecauseatnormaltemperatureshydrogenisaga