处罚是治安管理的必要手段，处罚的目的是( )。
A．为了教育本人
B．为了教育他人
C．维护治安秩序
D．给以必要的惩戒
参考答案：A,B,C
— How about the book you are reading now?
— Excellent indeed. You can find many problems we have come across ________ in it.[ ]
A. covered
B. covering
C. are referred
D. referred
QRS波群增宽原因有哪些？
