What proportion of the world’s electricity supply is provided by hydroelectric power? How is the flow rate of a hydroelectric p

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问题 What proportion of the world’s electricity supply is provided by hydroelectric power?
How is the flow rate of a hydroelectric power station quantified?

选项 A、The depth of the water.
B、Volume over time.
C、Speed over time.
D、The width of the water.

答案B

解析本题考查水流速的计算方式，故将答案出处定位到第五段。根据上题的分析可知，决定发电站的发电量有两个因素，其中一个是the flow rate，并对其进行了解释：calculated as volume over time，明确指出水流速度通过水流量除以时间(volume over time)来计算，其中quantified≈calculated，故[B]为答案。

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大学英语六级

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What proportion of the world’s electricity supply is provided by hydroelectric power? How is the flow rate of a hydroelectric p

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