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高频保护采用相----地制高频通道是因为

单选题
2021-09-01 20:45
A、所需的加工设备少,比较经济
B、相----地制通道衰耗小
C、减少对通信的干扰
D、相----地制通道衰耗大
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正确答案
A

试题解析

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