UnitUnit11Reading 2TV and audio devices: a reviewUnit 1 课件描述： 这是 Reading 板块的第二课时。由于 Reading 板块的文章不仅为学生提供丰富的信息，同时又富含字、词、句等语言材料供学生学习，所以第二课时教学主要关注学生对字词句等语言知识的学习和运用，如重要短语的理解和用法以及核心词汇的理解和用法等。Important phrases • the evolution of video and sound devices• shortly afterwards• contributed to the development of TV. • was very primitive and had many drawbacks• made important breakthroughs in the development of the TV • in the late 1920s and early 1930s• adopt many of the principles•constructed the first colour TV •regular colour TV broadcasts were delayed •within a short time •Satellites allow live TV programmes to be broadcast •over vast distances•make TV accessible to people who live far away from cities•throughout the countryside and the remote areas•a small percentage of people •benefit from satellite TV•broadcast the signals • made the first recording of a human voice • used round tubes to record on• used discs as alternative to tubes• be wound up by hand • Times sure have changed!• employed steel tape to record on• paper tape also tore easily. • by the late 1960s• Sound and video goes digital.• The first CDs were made available. • with the adaptation of digital technology• make … things of the past• keep pace with• foresee what the future will bringKey words1. contribute2. adopt3. delay4. access5. wind6. tear7. live• Many different people contributed to the development of TV. •contribute (v.) •1. to give money, help, ideas etc. to something that a lot of other people are also involved in contribute to/towards City employees cannot contribute to political campaigns.• contribute sth. to/to...
