题干

如图为某化学反应的微观示意图,图中“●”表示硫原子,“○”表示氧原子.下列说法中错误的是(   )

A:甲是SO2

B:反应中,甲、乙、丙三种物质的分子个数比为2:1:2

C:该反应属于化合反应

D:反应前后,分子、原子种类均不变

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答案(点此获取答案解析)

D

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