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单项选择题

The mechanical energy can be changed back into electrical energy by means of a generator．

A．通过发电机这种途径可以将机械能转变为电能。
B．利用发电机可以将机械能转变为电能。
C．借助于发电机可以把机械能返回电能。
D．使用发电机这个方法能将机器产生的能量还原成电。

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热门试题

单项选择题Which of the following statements is TRUE according to the passage

A．It is no proper to wear a red dress in summer.
B．We feel happier and more active if we see light and bright colors.
C．All the machines in a factory are painted orange.
D．No machines in a factory are painted black.

单项选择题Most of suicide victims are ______.

A．middle-aged males
B．men from age 40 to the mid-60s
C．blue collar workers
D．white collar workers