利用广播、电视作为传播手段,以录音、录像、文字教材为主要媒体进行教学,这既是广播电视教育形成新型教学系统的优势,也是电大远距离、开放性教育规律的具体体现。自中央电大成立以来,始终比较重视音像教材的建设,并录制了一批质量高、实用性强的音像教材,对于满足电大教学的需要,提高教学效果起到了重要的保证作用。然而,任何教学形式都有其自身的优缺点;特别是在教学手段日趋完善,教育思想不断创新、不断发展 The use of radio and television as a means of communication, recording, video, textbooks as the main media for teaching, which is not only the advantages of radio and television education to form a new teaching system, but also the long-distance, open education, a concrete manifestation of the law of education. Since the founding of the Central Radio and Television University, it has always placed a lot of emphasis on the development of audio-visual teaching materials and has recorded a number of audio-visual teaching materials of high quality and practicability. This has played an important role in ensuring the teaching needs of TV universities and improving teaching effectiveness. However, any form of teaching has its own advantages and disadvantages; especially in the increasingly perfect teaching methods, continuous innovation of educational ideas and continuous development