题干

王明同学提出了“低温会使酶的活性降低”的假设并设计实验进行验证。他在1、2、3号试管中依次分别加入了3%H2O2溶液5mL和蒸馏水0.5mL,3%H2O2溶液5mL和常温的新鲜猪肝匀浆0.5mL,3%H2O2溶液5mL和冷藏的猪肝匀浆0.5mL,观察到的实验现象是1号试管没有气泡产生,2号和3号试管中都产生了大量气泡。请问下列说法正确的是( )

A:小王的假设不成立

B:应该把1号试管中的3%H2O2溶液换成清水

C:应该把2号试管中的新鲜猪肝匀浆换成煮熟的猪肝匀浆

D:应该把3号试管中3%H2O2溶液换成冷藏的3%H2O2溶液5mL

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D

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