译林版高中英语选修七Unit 1 Living with technology Reading 课件（28张ppt）

(共28张PPT)
M7 Unit1 Living with technology
refrigerator
washing machine
Air conditioner
microwave oven
vacuum cleaner
desktop
laptop
The evolution of video and sound devices
Reading strategy: understanding headings
If you want to obtain some specific information, for instance, information about satellite TV, from this passage as fast as possible, what will you do?
Looking at headings and subtitles
（副标题）
______history of TV
(in order of______ )
Early history of____________
________________ go digital
TV
Audio
devices
Early
time
modern
age: Cable TV, satellite TV, digital TV,…
The
_______
sound recorders
Sound and video
1. Color TV became popular within just a few years after it was invented. ( )
2. People without satellite dishes do not benefit at all from satellite TV broadcasts. ( )
Reading (Part C1):
F（12-14）
F（24）
3. Some of the first tape recorders used plastic tape to record on. ( )
4. Records and cassettes do not offer as good a sound quality as CDs. ( )
5. New technology will soon make many of the things talked about in the article out of date. ( )
T（43-45）
F（28）
T(49-50)
Part One:（L1-25)
black-and-white TV
Make a timeline of the development of TV
1925
The first public TV broadcast were made in the USA
1928
Long-distance TV broadcast was made
between the UK and the USA.
Regular public broadcasting began.
1938
The first color TV program was broadcast
1951
Regular color TV broadcasts began in the USA




John Logie Baird
Most early TV broadcasts were made using his system. However, his system was very ________
and had many ____________.
primitive
drawbacks
Early history(1-17)
Philo Farnsworth
————————
He made important ______________ in the development of TV. Modern TVs use many of the ___________ first discovered by him.
breakthroughs
principles
1962
in , Satellites were used to broadcast TV
The Modern age(19-25)
Satellites make TV _________ to people who live far away from cities.
accessible
Satellite TV dishes
They can often be seen throughout the countryside and remote areas.

However, most people benefit ______ satellite TV, as local TV companies broadcast the _______ to the population living nearby.
from
signals
distributed
Part Two:(L26-52)
Early history of sound devices(26-32)
1877 :
Thomas Edison made the first recording
of a human voice.
tubes
Early record players used ______
to record on.
In 1887, Emile Berliner
used _______ as alternatives to tubes.
discs
tape recorders
Sound and video devices (33-41)
In1928, the first_______________used to copy sound were in Germany. Most early recorders employed __________ to record on.
steel tape
_____________________
were developed by the ________
late 1960s
Portable cassette player
Video recorders


By the late 1970s, video recorders for home use were introduced.
___________(1982)
Digital era
数字时代

_______(1993)
_______(1995)
VCD
DVD
the first CDs
Sound and video go digital
Keys for activity D.
1. ____ 2. ____ 3. ____
4. ____ 5. ____ 6. ____
7. ____ 8. ____
e
d
h
c
f
a
b
g
Keys for activity E.
1. __________ 2. ____________
3. __________ 4. ____________
5. __________ 6. ____________
7. __________
foresaw
drawbacks
constructed
delayed
percentage
receiver
Eventually