问题
单项选择题
在软交换协议体系中,属于主从协议的是()
A、SIP
B、H.248
C、H.323
D、SCTP
答案
参考答案:B
在软交换协议体系中,属于主从协议的是()
A、SIP
B、H.248
C、H.323
D、SCTP
参考答案:B
A. Sam B. Tom C. Mike 小题2: Mike visited Mount Tai __________. A. last week B. on May 18th C. last year 小题3:It took them __________ to get to the top of the mountain. A. the whole day B. the whole night C. the whole evening 小题4: In the morning, they enjoyed __________ on Mount Tai. A. a big dinner B. visiting a temple C. the sea of clouds 小题5:Mike and Tom are probably __________. A. friends B. father and son C. boss and employee |