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英语
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When we burn coal and wood,they ____ greenhouse gases
A.give in B.give out C.give off D.give up
人气:443 ℃ 时间:2020-04-03 01:24:41
解答
C give off放出(气体、气味、光、热等)
句子意思:当我们燃烧煤和木头的时候,就会放出会导致温室效应的气体
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