Carbon dioxide, which makes a between us and the sun, prevents heat from getting out of the atmosphere easily, so the earth is becoming warmer.A．difference B．comparisonC．connection D．barrier 题目和参考答案——青夏教育精英家教网—

题目内容

Carbon dioxide, which makes a ________ between us and the sun, prevents heat from getting out of the atmosphere easily, so the earth is becoming warmer.

A．difference B．comparison

C．connection D．barrier

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