A) gasoline is the cheapest source of hydrogen
B) gasoline is a available source of hydrogen
C) gasoline is an environmentally sound source
D) gasoline is being used by many rich countries
7. The greatest part of the hydrogen economy lies in the derivation of hydrogen from ________.
A) fossil fuels
B) electrolytic water
C) renewable sources
D) hydrocarbon-molecules
8. The big problem with hydrogen involves its storage and transportation, for it is massive but not suitable for ________________.
9. There is an obstacle for the construction of hydrogen stations and the transportation infrastructure, which can be overcome with the advent of a dominant _______________.
10. Cars using gasoline-powered fuel-cell have such advantages over traditional ones as higher efficiency and less.________________.
文章梗概:
本文介绍了氢气经济的优势、问题和前景。引言部分指出燃烧矿物燃料的四大问题。第一个标题分析了氢气经济的四大优势。第二个标题介绍了氢气的两个来源通过电解水或者改造矿物燃料获得氢气。第三个标题谈到了氢气的储藏和运输问题。第四个标题预测了氢气经济发展的未来状况。
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