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"content": "硝酸光照分解的方程式\n$$4HNO_{3}overset{overset{}{phantom{Delta}}}{underset{underset{}{text{或光照}}}{=}}4NO_{2} uparrow + O_{2} uparrow + 2HO_{2}$$\n氢气与氧气燃烧的现象如下图所示：\n",
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