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医务人员用3％的过氧化氢溶液为伤者处理伤口时，在伤口上会产生大量的气泡。下

列有关说法中，错误的是 （ ）

A生成的气体可能是过氧化氢分解产生的氧气

B伤口处的生物酶可能对过氧化氢的分解起到催化作用

C只有二氧化锰能够使过氧化氢在常温下迅速分解产生氧气

D过氧化氢和水的分子构成不同，所以它们的化学性质不同