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电报发展史
albertixbv921420
- 51 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信息传递方式,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,并由熟练的操作员进行??
https://gregoryikum292719.answerblogs.com/profile
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