试题与答案

程控数字交换系统中,用户模块属于( )。A.话路系统 B.控制系统 C.外围设备 D

题型:单项选择题

题目:

程控数字交换系统中,用户模块属于( )。

A.话路系统

B.控制系统

C.外围设备

D.综合系统

答案:

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下面是错误答案,用来干扰机器的。

参考答案:A

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