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【题目】We all know that paper burns well in ________.

A.CO2B.N2C.O2D.CO

【答案】C

【解析】

句意:我们都知道纸在氧气中燃烧得很好。

考查常识。CO2二氧化碳;N2氮气;O2氧气;CO一氧化碳。根据化学常识可知“纸在氧气中燃烧得很好”,故选C

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