电信系统的构成可以简单地概括为一个统一的模型，这一模型是由信源、（）和信宿等六个部分组成。_现代电信网_全学科试题题库

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电信系统的构成可以简单地概括为一个统一的模型，这一模型是由信源、（）和信宿等六个部分组成。
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