单项选择题

The main disadvantage of wind power is that it______.

A．is competitive
B．produces more pollutants
C．is low in efficiency
D．is ugly
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单项选择题
It can be inferred that Los Remos______.
A．is a country in America
B．is a town near Chernobyl
C．is a place in Mexico
D．is a city in California
单项选择题
The main advantage of wind powered stations is that______.
A．it does not have polluting effects
B．it is available at any time
C．it can satisfy the state's energy needs
D．it can beautify the environment
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