智课网TOEFL备考资料托福综合写作真题及解析摘要:新托福考试在托福写作方面做了很大的调整,在原来的一篇独立写作上增加了一篇综合写作。不少同学都反应,综合写作好难,又要听又要读才能写。是的,现在小编为大家准备了一篇托福综合写作真题,并进行了分析。考生可根据下面的分析找找做综合写作的技巧。Directions:Youhave20minutestoplan,write,andreviseyourresponsetoareadingpassageandalectureonthesametopic.First,readthepassageandtakenotes.Then,listentothelectureandtakenotes.Finally,writeyourresponsetothewritingquestion.Typically,agoodresponsewillrequirethatyouwrite150-225words.ReadingCarmanufacturersandgovernmentshavebeeneagerlyseekingareplacementfortheautomobile'smainsourceofpower,theinternal-combustionengine.Byfarthemostpromisingalternativesourceofenergyforcarsisthehydrogen-basedfuel-cellengine,whichuseshydrogentocreateelectricitythat,inturn,powersthecar.Fuel-cellengineshaveseveraladvantagesoverinternal-combustionenginesandwillprobablysoonreplacethem.汽车制造商和政府都在积极地寻找内燃机的代替品,而目前内燃机是汽车主要的动力源。目前为止,氢燃料电池发动机是最有竞争力的汽车动力代替品。氢燃料电池发动机是用氢作燃料产生电能以充当汽车的动力。鉴于燃料电池发动机相对于内燃机发动机优点多多,因而可以很快替代内燃机。Oneofthemainproblemswiththeinternal-combustionengineisthatitreliesonpetroleum,eitherintheformofgasolineordieselfuel.Petroleumisafiniteresource;someday,wewillrunoutofoil.Thehydrogenneededforfuel-cellenginescannoteasilybedepleted.Hydrogencanbederivedfromvariousplentifulsources,includingnaturalgasandevenwater.Thefactthatfuel-cellenginesutilizeeasilyavailable,renewableresourcesmakesthemparticularlyattractive.内燃机发动机的问题之一就是对于石油的依赖,而石油具体的形式是汽油或者柴油。石油是不可再生资源,总有一天会用尽的。而燃料电池发动机所使用的氢则不是那么容易消耗完的。氢有多种来源,比如天然气和水。燃料电池发动机很容易得到,而这种能源的可再生性使其特别具有吸引力。Second,hydrogen-basedfuelcellsareattractivebecausetheywillsolvemanyoftheworld'spollutionproblems.Anunavoidableby-productofburningoiliscarbondioxide,andcarbondioxideharmstheenvironment.Ontheotherhand,theonlybyproductoffuel-cellenginesiswater.第二,氢燃料电池发动机还可以在全球范围内解决污染问题,这也是其具有吸引力的原因。使用石油不可避免的副产品就是二氧化碳,这是对环境有害的气体。而与此同时,燃料电池发动机唯一的副产品就是水。Third,fuel-cellengineswillsoonbeeconomicallycompetitivebecausepeoplewillspendlessmoneytooperateafuel-cellenginethantheywilltooperateaninternal-combustionengine.Thisistrueforonesimplereason:afuel-cellautomobileisnearlytwiceasefficientinusingitsfuelasanautomobilepoweredbyaninternal-combustionengineis.Inotherwords,thefuel-cellpoweredcarrequiresonlyhalfthefuelenergythattheinternal-combustionpoweredcardoestogothesamedistance.第三,因为燃料电池发动机的使用费用比内燃机发动机低,燃料电池发动机很快就会在价格上很有竞争力了。这个道理是很简单的。燃料电池汽车的能量利用率几乎是使用内燃机发动机的汽车的两倍。换句话说,行驶相同的距离,使用燃料电池发动机汽车只需要消耗内燃机汽车的一半能量。相关推荐:名师点评:托福听力怎么应对名师点评:托福备考水杯原理新托福参考资料选择相关字搜索:托福综合写作真题