【題目】If H2 burn in O2, we can get ___________.
A.H2
B.H2O
C.O2
D.H2O2

【答案】B
【解析】句意:如果氫氣在氧氣中燃燒,我們可以得到水。此題考查對語句的正確理解,及對化學(xué)的相關(guān)知識的把握,根據(jù)語境可知此題選擇B。水的分子式是H2O。

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