TEST I: điền từ
transmission growth developed energy popular basic possible
improved
practical regular
The development of television
Television was not really invented. Many scientists invented or (1) __________ parts of the systems
that have become the television systems we know now. Radio, of course, was necessary before
television could be (2) __________ , because the television uses the same principles of electromagnetic
waves that radio does. As soon as radio became possible, the possibility of television(3) _________ was
also known, but it took many years for it to become (4) ____________ .
British and American scientists helped to develop the (5) ___________ ideas that made television
(6) ___________ , but it was a Russian who made th first practical television system. By 1923, Vladimir
Zworykin , a Russian, had invented a camera tub that could turn pictures into electric (7) ___________ .
By 1929, Zworykin had built a television system that work.
By 1935, (8) ____________ television broadcasts were begun in Germany. the first broadcasts in
the United States began in 1939, but television did not really become (9) ___________ until later the
Second World War. Between 1945 and 1955 there were rapid (10) ___________ in the practical use of
television.
Loga
Sinh Học lớp 12
