警告是公安机关对违反治安管理行为人以( )的方式作出的谴责和告诫。
A．口头
B．书面
C．口头、书面均可
D．羁押
参考答案：B
Johnson has a lot of friends here. He _____ most of them, and they like to play with him. [ ]
A. gets along well with
B. comes up with
C. takes part in
D. lets himself down
同心集成式注水管柱的（）封隔器为配水封隔器。
A、第一级和第二级
B、第一级和第三级
C、第一级和第四级
D、第二级和第四级
