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  3. The passage gives a general description of both the advantages and disadvantages brought by a hydrogen economy. In the United S

The passage gives a general description of both the advantages and disadvantages brought by a hydrogen economy. In the United S

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问题 The passage gives a general description of both the advantages and disadvantages brought by a hydrogen economy.
In the United States, most of the electricity is generated from coal or natural gas.
选项 A、Y
B、N
C、NG
答案A
解析 根据标题Where Does the Hydrogen Come From?下末段首句Where will the electricity for the electrolysis of water come from?可以发现，Currently，about 68 percent of the electricity produced in the United States comes from coal or natural gas．而about 68 percent表明，大部分电都来源于煤和天然气。
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