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  3. What proportion of the world’s electricity supply is provided by hydroelectric power? Global hydroelectric power in theory is a

What proportion of the world’s electricity supply is provided by hydroelectric power? Global hydroelectric power in theory is a

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问题 What proportion of the world’s electricity supply is provided by hydroelectric power?
Global hydroelectric power in theory is approximately ______ than the amount that has been taken advantage of today.
选项
答案four times larger
解析 本句中出现than表比较的词，并且所填空是在than之前，故此处应填比较的数字。本题涉及到全球水力发电与目前实际水力发电的利用的比较，故将答案出处定位到末段。该段首句提到Theoretical global hydroelectric power is approximately four times larger than the amount that has been taken advantage of today，其中题干中的in theory对应Theoretical，句型基本没有转换，故答案为。
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