试题与答案

2Mbit/s速率通信电缆的允许衰耗() A.6dB B.10dB C.20dB D

题型:单项选择题

题目:

2Mbit/s速率通信电缆的允许衰耗()

A.6dB

B.10dB

C.20dB

D.3dB

答案:

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