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  3. What proportion of the world’s electricity supply is provided by hydroelectric power? When did hydroelectric power was universa

What proportion of the world’s electricity supply is provided by hydroelectric power? When did hydroelectric power was universa

admin2009-08-19  17
问题 What proportion of the world’s electricity supply is provided by hydroelectric power?
When did hydroelectric power was universally considered as an environmentally safe and clean means of electricity generator?
选项 A、Around 250 BC.
B、In 1982.
C、In the middle .years of 20th century.
D、Until only recently.
答案D
解析 本题考查人们普遍认为水力发电是一种干净没有污染的发电方式的时间，故将答案出处定位到第八段。该段首句明确指出是2003年左右人们才普遍认识到，四个选项中只有[D]最为接近，故为答案。
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