【同课异构】2018-2019学年译林版高中英语选修8课件:Unit 1《Period Two Reading》
【同课异构】2018-2019学年译林版高中英语选修8课件:Unit 1《Period Two Reading》第3页

When did regular public TV broadcasting begin around the world? It began on 11 May 1923 in New York and in London on 20 August 1929. What is WebTV? It is the TV set combined with the World Wide Web.

What was invented in 1954? The cassette recorder was invented in 1954.