细菌与自然界的关系：腐生细菌和其他腐生生物一起把动植物的遗体_______ ，促进了自然界的__________________。
分解；物质循环
根据句意，用括号内所给词的适当形式填空。
1. There are some ______(piano) in the room.
2. What club do you want _____ (join)?
3. May I _____ (swim) here?
4. His mother is a ______(music).
5. That is ______ (we) classroom.
设定和实施行政处罚必须以事实为依据，与违法行为的（）相当。
A.事实
B.性质
C.情节
D.社会危害程度
