单项选择题

In the last paragraph, the word" temporary" means（）

A．lasting for a short time
B．not deep
C．unimportant
D．developing very slowly

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单项选择题
The largest part of the radiant energy directed toward the earth is（）

A．stored by plants
B．turned into fuel
C．absorbed by the earth' s atmosphere
D．used for electric power
单项选择题
The sun' s energy indirectly provides the earth with（）

A．fuels
B．waterpower
C．light
D．both A and B
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