催化剂再生前后必须及时调换、确认盲板位置正确。
参考答案:对
在违反治安管理行为构成要件中,( )处于核心地位。
A.危害行为
B.主观要件
C.危害结果
D.主体要件
-What’s wrong with Tom? He didn’t talk to all the afternoon.
-Oh, he failed in his exam.
A.somebody
B.anybody
C.nobody
D.no one