精英家教網 > 初中英語 > 題目詳情
Which of the following does paper burn in?
A．CO2B．N2C．HeD．O2
D
CO2 二氧化碳； N2氮氣；He氦氣；O2氧氣。句意：紙張在下列哪種氣體中燃燒？結合常識，可知選Ｄ。
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