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单选题网络管理员

2010-04-14

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参考答案

D

答案解析

结构化系统比非结构化布线系统使用周期长并且具有通用性。跳接设备是将传输介质连接到跳接器上，跳线可用颜色和标号识别。

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3 请选择（2）处最佳答案

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