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What proportion of the world’s electricity supply is provided by hydroelectric p
What proportion of the world’s electricity supply is provided by hydroelectric p
游客
2023-09-15
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问题
What proportion of the world’s electricity supply is provided by hydroelectric power? [br] A drawback to low head hydroelectric power stations is that they depend on ______ .
选项
A、the solar activity
B、seasonal water flow
C、seasonal wind direction
D、the earth’s self rotation
答案
B
解析
本题考查低水头水力发电站的缺点,故将答案出处定位到第七段。该段介绍了低水头水力发电的工作过程,末句的Unfortunately引出其缺点:their electricity production capacity fluctuates with seasonal water flow in a river,即其缺点是发电量要随着季节性的水流而波动,其中fluctuate意为“波动,涨落”,故[B]为答案。
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