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 高等继续教育 / 计算机网络
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1. 物理层的主要任务是确定与传输媒体接口的特性。其中,用于描述不同功能事件出现顺序的是物理层的( )。
A、机械特性
B、功能特性
C、电气特性
D、过程特性
  积分
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