内容正文:
Unit 1 Living with technology
Welcome to the unit
1.Early TV was in black and white and ________ (have) a poor picture.
2.Now we can record music using computers.
3.________ (dictionary) never looked like this before.
4.With mobile phones, we can keep in t________ with others wherever we are.
Reading
The ________ (演变,发展,进化) of video and sound ________ (装置,设备)
Early history of TV
The first public TV broadcasts ________ (make) in the USA in 1925. Later, in 1928, the first long-distance TV broadcast was made between the UK and the USA. Regular public broadcasting followed ________ (short) afterwards, first ________ (begin) on 11 May 1928 in New York and on 20 August 1929 in London.
Many different people contributed to the ________ (develop) of TV. Most early TV broadcasts were made using a system ________ (develop) by John Logie Baird in the UK. However, his system was very primitive and had many ________ (缺点,缺陷,不利条件). An American, Philo Farnsworth, made important breakthroughs in the d