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  3. What emitted from the exhaust pipe of the GM minivan the author drove is so clea

What emitted from the exhaust pipe of the GM minivan the author drove is so clea

游客2023-09-16  29
问题 What emitted from the exhaust pipe of the GM minivan the author drove is so clean that it is drinkable. [br] To separate hydrogen from oxygen needs electricity that can be created by ______.
选项
答案 fossil fuels and coal
解析 由题干关键词To separate hydrogen from oxygen need electricity定位到第三个小标题下第三段第二、三句。根据这两句可知从氧里分解氢需要用电，而发电又要用到矿物燃料。
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