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2019-2020年高中英语必修7Unit1Livingwithtechnology-Section1Section 1 A text structure analysis of TV and audio devices: a reviewI. Summary of TV and audio devices: a reviewMain idea of the passagebrief introduction of the history of TV and audio devicesMain idea of part 1early history of TVMain idea of part 2TVs in modern ageMain idea of part 3early history of audio devicesMain idea of part 4the development of tape recorders and playersMain idea of part 5the use of digital technology in soundsII. A tree diagram of the text TV and audio device: a reviewaudio eviceTVThe first human ecord(1877)wireless TV (1925)old TVrecorder playerthe first record player(1887)long-distance TV(1928)the first LPs (1958)colour TV (1929)tape records and playersThe first orders(1931)cable TV (1948)modern TVthe transistor(1948)satellite (1962)Digital (1989)cassette corder(1954)web TV (1996)Thefirst D(1982)the Walkman(1979)MD layer(1992)MP3 (1987)III. A retold version of the text TV and audio devices: a reviewThe reading passage is a review of the development of the development of TV and audio devices. It provides some information about the history, the current situation and the future improvement of TV and audio devices. Take TV for example, the first public showings of wireless TV transmissions took place way back in 1925. Then TV kept progressing in the following decades and in xx, 66 per cent house holds in the USA had cable TV. As with TV, audio devices have been developing rapidly and surprisingly. These inventions all bring great convenience and delight to peoples lives.
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