正确答案: ABCD
来话显示 呼叫转移 呼叫等待 多方通话
题目:移动通信网在基本业务基础上开发的补充业务,包括()和呼叫限制等。
解析:ABCD
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学习资料的答案和解析:
[多选题]彩色摄影和彩色电视中重现的所谓基色有( )
红
绿
蓝
解析:ABD
[单选题]The exponential growth of mobile broadband traffic is certainly () by both, the increasing demand for known and new data services,such as mobile internet access, social networking,location-based services/personal navigation and so on, and the data () and storage capabilities of state-of-the-art terminals, such as smartphones and the most recent tablets.
lead
[多选题]一级交换中心的职能有()。
汇接所管辖的二级交换中心的电路
组织一级交换区之间的迂回
疏通本交换区与本交换区以外的转话业务
疏通所辖的本交换区内各二级交换区之间的转话话务。
解析:A, B, C, D