业务信道分配请求次数统计点是（）消息 A: PagingResponce B: ChannelAssignmentMessage C: AssignmentRequest D: AssignmentCompletion
业务信道分配请求次数统计点是（）消息 A: PagingResponce B: ChannelAssignmentMessage C: AssignmentRequest D: AssignmentCompletion
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