课堂任务5-1 认识现代通信技术
课堂任务5-2 现代通信技术的应用
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https://abooks.hep.com.cn/h5/resource/detail?resourceId=P3CZ2HA58&projectId=PK9APHMVT
https://abooks.hep.com.cn/h5/resource/detail?resourceId=P3TZN7A58&projectId=PK9APHMVT