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经过近半个世纪的努力，我国广播电视网已发展成为世界上覆盖人口最多的信息传播网，在国民经济社会信息化进程中发挥着越来越重要的作用。一、我国广播电视网的发展概况及特点（一）我国广播电视网的发展概况本世纪20年代，我国出现了无线电广播。随着延安新华广播电台于1940?
After nearly half a century of hard work, China’s radio and television network has developed into the world’s most populous network of information dissemination, playing an increasingly important role in the national economic and social information process. I. Overview and Characteristics of the Development of China’s Broadcasting Network (I) Overview of the Development of China’s Broadcasting Network In the 1920s, there was a radio broadcast in our country. With Yan’an Xinhua radio station in 1940?