在MSC服务器上受限媒体网关组(RestrictedMGG)必须被连到.()
A.RNC路由
B.BSC路由
C.BICC路由
D.ISUP路由
参考答案:B, D
Cooking calls for _______ patience and time but it is _______ enjoyable experience.
A.a; the
B.不填; an
C.the; an
D.a; 不填