He is quite strange, for everything he does is opposite to ______ is considered normal behavior.

A．whether

B．that

C．what

D．which

我国公安机关对危害国家安全的敌对势力、敌对分子和严重危害社会治安秩序的犯罪分子进行 * * 、制裁、改造和监督的社会效能是( )。

A．文化职能

B．经济职能

C．民主职能

D．专政职能