主站与PMU通信宜采用网络通讯方式,在网络通信方式下底层传输协议采用()。
A、TCP
B、UDP
C、IP
参考答案:A
_______hard you try, it is difficult to lose weight without cutting down the amount you eat .
A.However
B.Whatever
C.Whichever
D.Whenever
制表符键是键盘上的()键
A.Shift
B.Ctrl
C.Tab
D.Alt