一个站点至少需要()DNS服务器。
A.1个
B.2个
C.3个
D.不需要
参考答案:A
The boy got ______ for his dangerous driving. [ ]
A. punish
B. punished
C. punishing
D. being punished
反向闭环功控的开始点是()
A、R-TCH preamble Msg;
B、F-Channel Assignment Msg;
C、MsAck Order Msg;
D、BsAck Order Msg。