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问题详情

In a ()switching system, a call was established and routed in a set of progressive electromechnical steps, each under the direct control of the user ’ s dialing pulse.

A、step-by-step

B、crossbar

C、stored-program-control

D、manual

时间：2021-09-01 21:07 关键词：联大河南师范大学计算机科学与技术专业英语

答案解析

A

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