单项选择题
A.摘机 B.挂机 C.拨号 D.通话
A.Party Service B.Position Service C.Public Service D.Post Service
A.等待 B.转移 C.追踪 D.应答
A.Outgoing Call Barring B.Incoming Call Barring C.Outgoing Call Diversion D.Incoming Call Diversion
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