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  • 1. 根据句意和括号内的提示语,完成下列句子,并注意正确的形式。

    1. (1) The scientists guess that Venus(金星)is (无生命的).

    2. (2) This mountain is about four kilometers above the (海平面).

    3. (3) Everybody knows the (环境)is very important to us.

    4. (4) In some big cities, the pollution of the (大气层)is serious.

    5. (5) (温度)usually decreases with height.

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