题目内容
6．Which of the following does paper burn in？（ ）| A． | CO2 | B． | N2 | C． | He | D． | O2 |
分析 纸在下列哪一种气体中燃烧？
解答 答案D N2氮气，He氦气，O2氧气，CO2二氧化碳．根据化学常识可知，纸只能在氧气中燃烧，故答案选D．
点评 本题考查考生的化学常识在英语中的运用．
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