单项选择题

In writing this letter the author is ______.

A．disagreeing with a proposal
B．criticizing a proposal
C．supporting a proposal
D．putting forward a proposal
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单项选择题
Which of the following is NOT an advantage of wind energy
A．Wind energy does not require the flooding of large land areas.
B．Wind energy produces no waste products.
C．The availability of wind energy is not dependent on the weather.
D．Wind energy does not produce thermal or chemical effluents.
单项选择题
From the passage it can be assumed that wind energy is better because ______.
A．it is cheaper than electric power
B．it does not alter the environment as much as other types of power
C．it lasts longer than electric power
D．it is more efficient than electric power
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