5. 由题干关键词obtain hydrogen from oil and natural gas定位至第二个标题Where does the hydrogen come from?下第三段第二句Using a device called a fuel processor or a reformer, you can split the hydrogen off the carbon in hydrocarbon relatively easily and then use the hydrogen.可以使用能源处理器把碳从碳氢化合物中轻松分离出去并获得氢气。因此D)为正确答案。这里的split off意为分离,分裂.
6. 由题干关键词 hydrogen和gasoline定位至第二个标题Where does the hydrogen come from?下第四段倒数第三句When you hear about fuel-cell-powered vehicles, almost all of them plan to get the hydrogen for the fuel cells from gasoline using a reformer. 许多汽车公司正在研制的燃料电池动力车,他们都计划用能源处理设备从汽油中分离出氢气作为汽车的燃料电池。再结合倒数第二句The reason is because gasoline is an easily available source of hydrogen.因为汽油是方便可行的氢气来源。因此B)为正确答案。
7. 由题干关键词derivation of the hydrogen定位至第二个标题Where does the hydrogen come from?下第五段第二句To have a pure hydrogen economy, the hydrogen must be derived from renewable sources rather than fossil fuels要发展纯粹的氢气经济,氢气必须从再生能源中获得,而不是从矿物燃料中获得。因此C)为正确答案。这里的renewable sources意为再生能源,可更新能源,fossil fuels 意为矿物燃料.
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