Unit1 Living with technology

Reading 2

Teaching aims:

Students will learn to use some important phrases and key words.

Teaching procedures:

Step 1 Important phrases

• The evolution of video and sound devices

• contributed to the development of TV

• was very primitive and had many drawbacks

• 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 bring

Step 2 Key words

1. contribute (v.)