广播和电视是上个世纪前叶相继发明的听、视媒体。在其后的岁月里,随着科学技术的不断进步和社会的发展,随着广播电视的日趋普及,其在政治、经济、军事、文化、科技、社会生活等各个方面发挥着极大的和极其明显的作用。在全球化时代的今天,广播电视的作用和功能更是非同寻常,已成为无以伦比的大众强势媒体。与此同时,广播电 Radio and television were invented in the previous century as the listening and viewing media. In the years that follow, with the continuous progress of science and technology and the development of society, with the increasing popularization of radio and television, it has played a very important role in politics, economy, military affairs, culture, science and technology, social life and other aspects Extremely obvious effect. In the era of globalization, the role and function of radio and television are even more remarkable. They have become an unrivaled mass media. In the meantime, radio