大学英语六级考试
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What proportion of the world's electricity supply is provided by hydroelectric power?
正确答案：有， 或者 答案解析：有， 2小题>
A drawback to low head hydroelectric power stations is that they depend on ______ .
A the solar activity
B seasonal water flow
C seasonal wind direction
D the earth's self rotation
正确答案：有， 或者 答案解析：有， 3小题>
How far water drops to the turbines in a power station is known as ______ .
A the heads
B the flow rate
C the vertical distance
D the heights
正确答案：有， 或者 答案解析：有， 4小题>
How is the flow rate of a hydroelectric power station quantified?
A The depth of the water.
B Volume over time.
C Speed over time.
D The width of the water.
正确答案：有， 或者 答案解析：有， 5小题>
When do high head power plants use surplus electricity to transfer water to a second reservoir?
A In the morning.
B At noon.
C In the afternoon.
D At night.
正确答案：有， 或者 答案解析：有， 6小题>
What underwater action can lead to the production of pollution similar to that produced by fossil fuel power stations?
A Mass dying of underwater creature.
B Recycling of underwater waste products.
C Decomposing flooded vegetation.
D Abstracting underwater oil.
正确答案：有， 或者 答案解析：有， 7小题>
When did hydroelectric power was universally considered as an environmentally safe and clean means of electricity generator?
A Around 250 BC.
B In 1982.
C In the middle .years of 20th century.
D Until only recently.
正确答案：有， 或者 答案解析：有， 8小题>
The origin of hydroelectric power is the ______ produced when water obeys the laws of gravity.
正确答案：有， 或者 答案解析：有， 9小题>
Global hydroelectric power in theory is approximately ______ than the amount that has been taken advantage of today.
正确答案：有， 或者 答案解析：有， 10小题>
Exploiting hydroelectric power resource can cost billions of dollars, for hydroelectric plants normally have ______ .
正确答案：有， 或者 答案解析：有，
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······hydroelectric是什么意思_百度作业帮
hydroelectric是什么意思
hydroelectric是什么意思
hydroelectric 意思hydroelectric[英][ˌhaɪdrəʊɪˈlektrɪk][美][ˌhaɪdroɪˈlɛktrɪk]adj.水力发电的; 例句:1.Hydroelectric power provides almost one-fifth of the world's electricity. 水电提供了世界差不多1/5的用电量.2.Once built, nuclear plants produce some of the cheapest electricity available other than big hydroelectric dams. 一旦建成,这些核电厂的发电成本将比大型水电站低得多.3.Officials have argued that the environmental benefits of hydroelectric power outweigh its costs. 政府官员曾指出,水力发电给环境带来的好处大于成本.hydroelectric-generator的用法和样例：
Solar heat also drives the Earth's rain cycle, powering modern hydroelectric generators.
太阳热影响地球的雨循环并供给现代水力发电机的动力。
"double fulcrum" hydroelectric generator
“两支点”水轮发电机组
This paper investigates a new method of diagnosis for faults of hydroelectric generating set.
摘要本文提出了一种水轮发电机组故障诊断的新方法。
Furthermore, fuzzy expert system is employed to representing the uncertainty knowledge of the hydroelectric generating units.
针对水电机组的多层次故障诊断结构,研究了其诊断专家知识面向对象的表示方法;
It is shown that the static stability of adjustable speed hydroelectric generating units with DFG is interrelated to the feedback coefficients of their controllers.
分析结果表明,可调速双馈水轮发电机组的静态稳定性与控制器的反馈系数密切相关。
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