人教版高中英语选修八Unit3Writing.pptVIP

Unit 3 * * 概要写作 阅读下面短文，根据其内容写一篇60词左右的内容概要。 In the history of television, there were many inventors working on the idea of watching pictures on a screen. Inventors from all over the world had been working on transmitting pictures to a screen since the 1830s, but the first physical television didn’t appear until the 1900s. Five men became the most famous inventors of what we know today as television. A German inventor named Paul Nipkow invented the first rotating (旋转的) disk that would allow pictures to transmit over wire in 1884. His discovery was the first electromechanical (电动机械的) television scanning system in the world. John Baird became famous when he invented the first pictures in motion that were televised in Europe in 1924. He later transmitted the human face to a screen, and during World War II invented the first color-picture tube. While it would be some time before color TV became popular in American households, his contribution to the history of TV was enormous. * * Charles Jenkins invented a mechanical television called “radiovision”, which was said to have transmitted one of the first moving images in 1923. This American inventor went on to promote his theories in the technology of the television along with other inventors when they transmitted the first live pictures to a screen. Charles Jenkins was also famous for creating the first television station in North America. Vladimir Zworykin invented the first cathode-ray tube, which he named kinescope (显像管) and started a new era in the history of TV. Before the kinescope, televisions in the 1920s were mechanical. The cathode-ray tube was not only needed for transmission; this device transformed the television into an electronic device. Finally, an American farmer named Philo Farnsworth made a breakthrough in the history of TV at the age of 13, when he discovered a way to transmit images to a screen by the use of 60 horizontal (水平的) lines, which made the picture clearer. Farnsworth al