单项选择题
Which of following interface are not using CCS7 protocol？（）
A.Gn B.Gd C.Gs D.Gr
单项选择题 When a mobile of B class is on the state of standby，what MM information is registered in SGSN？（）
单项选择题 What can MS do when it is standby state？（）
单项选择题 What could a MS do when its state changes from idle to ready？（）
