【单选题】【消耗次数：1】
以下网络传输介质中传输速率最高的是________。
①
双绞线
②
同轴电缆
③
光纤
④
电话线
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传输介质是网络中收发双方之间通信的物理媒介。下列传输介质中，具有很高的数据传输速率、信号衰减最小、抗干扰能力最强的是（ ）。
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传输介质是网络中收发双方之间通信的物理媒介。下列传输介质中，具有很高的数据传输速率、信号衰减最小、抗干扰能力最强的是（ ）。
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