You may take TV for granted.Why?Most people have a TV and watch it every day.But if you were born 100 years ago,you would not be able to watch TV .You wouldn’t even know what TV is!　　In the 19th century,scientists started to think about how to

You may take TV for granted.Why?Most people have a TV and watch it every day.But if you were born 100 years ago,you would not be able to watch TV .You wouldn’t even know what TV is!　　In the 19th century,scientists started to think about how to
You may take TV for granted.Why?Most people have a TV and watch it every day.But if you were born 100 years ago,you would not be able to watch TV .You wouldn’t even know what TV is!　　In the 19th century,scientists started to think about how to make machines that send pictures a long way.In 1900,they thought of a word for this kind of machine – television.Since then,many people around the world have tried to build a TV .　　On e early inventor was a Scottish engineer named John Logie Baird.He built the first TV in Britain in 1926.On his television,people could see a person’s face.But the face was not very clear and couldn’t move.　　Around the same time,in 1927,American Philo Farnsworth built the first modern television.His television on ly showed a simple black line.It didn’t have any sound but the picture could move.　　Farnsworth was on ly 20 when he built the first television.But he was not the on ly inventor of TV .Russian Vladimir Zworkin also invented many imp ortant things.　　Over the next few years,televisions really started to improve.In the 1930s,people began to make TV programmes.In 1938,families could buy televisions and watch them at home.　　The early televisions were black and white,and there were on ly a few channels (频道).Some of them had to be used with a radio so that people could listen as well as see.Later,people could buy colour televisions.By 1967,most TV programmes were in colour.（1）.This passage mainly tells us ____.　A .what a television is 　　B.how a television works 　　C.how the television was invented 　　D.why it is good to watch television （2）.Which of the following statements is true about the first television?A .It was made in China.　　B.It could show clear pictures.　　C.It was invented by an engineer.　　D.The pictures on it could move.（3） The first modern television was better than the old on es because ____.A .it on ly showed a black line.　B.it showed pictures with sounds 　　C.the pictures were in colour 　　D.the pictures could move （4）.The underlined word “improve” means “____”.A .get better 　B.impossible 　　C.imp ortant D.sell well

You may take TV for granted.Why?Most people have a TV and watch it every day.But if you were born 100 years ago,you would not be able to watch TV .You wouldn’t even know what TV is!　　In the 19th century,scientists started to think about how to
1.C 电视是如何被发明的
2.C 它是由一个工程师发明的
3.D 画面可以动
4.A 改进,变的更好