论文部分内容阅读
A和B可以相互转化,B在沸水中可以生成C,C在空气中氧化成D,D有臭味。问:ABCD各是什么?
A and B can be transformed into each other, B in boiling water can generate C, C in the air is oxidized to D, D smell. Q: What are ABCD each?