What proportion of the world’s electricity supply is provided by hydroelectric power? A drawback to low head hydroelectric powe

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问题 What proportion of the world’s electricity supply is provided by hydroelectric power?
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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大学英语六级

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What proportion of the world’s electricity supply is provided by hydroelectric power? A drawback to low head hydroelectric powe

大学英语六级

Internationaltravelcanbearichandrewardingadventure.Wewouldliketooffersomeadvicetohelpyouplanasafeandhealt

IfeelthatIwouldhavemorescopeforpersonaldevelopmentinyourcompanyandthattheworkwillbemorechallengingforme.

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Theappealofadvertisingtobuyingmotivescanhavebothnegativeandpositiveeffects.Consumersmaybeconvincedtobuyapro

A、Sixtydollars.B、Thirtydollars.C、Ninetydollars.D、Onehundredandtwentydollars.BW:Theadmissionpriceis$90perperson

A、Eliminatingtheoriginalvegetationfromthebuildingsite.B、Makingthehousesinanareasimilartooneanother.C、Deciding

A、Thestoriesprobablyweren’ttrue.B、Tomdoesn’tusuallytellfunnystories.C、She’ssurprisedTomwassoseriouslastnight.

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