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电报历史
agnescqlu224222
- 2 hours 21 minutes ago
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电报诞生于19世纪中叶,最初作为一种远距离通信方式,极大地影响了当时的社会面貌。早期的电报系统依赖于莫尔斯电码进行信息编码,并由专业的操作员进行处理??
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