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BN KIÊN NHẪN NHỈ ???
Read the text about Alexander Graham Bell and do the tasks:
Alexander Graham Bell is widely known as inventor of the first telephone. He was born on March 3rd, 1847 in Edinburgh, Scotland. When he was 23, Bell emigrated to Canada with his parents and the next year moved th the United States to teach deaf-mute children. With his colleague Thomas Watson, Bell worked very hard on the experimentation to invent devices such as the harmonic telegraph ( used to send multiple messages over a single wire) and phonautograph ( used to draw the shape of the sound waves). The first telephone communication was said to have happened between Bell and Watson in 1876 while Bell was at one end of the line, and Watson worked on the telephone in other room. The first transmitted words were, " Mr Watson, come here. I want to see you"
a. Decide if the statements are T or F
1. Alexander Graham Bell is Scottish /T/
2. He spent all his life in Canada /F/
3. He worked with the deaf when he moved to the USA /T/
4. He wanted to create a device that can transmit human voice /T/
5. He was able to succeed right from the first experiment /F/
6. He worked on his inventions all by himself /F/
b. Answer the questions
1. What is Bell 's "harmonic telegraph"?
It's used to send multiple messages over a single wire
2. What is Bell 's "phonautograph"?
It's used to draw shape of the sound waves
3. When did the first communication over happened and how did it happen?
.... ( mk chịu )
1. Alexander Graham Bell was born in Scotland
2. Alexander Graham Bell went to live in Canada
3. Alexander Graham Bell went to live in the United States
4. Alexander Graham Bell worked with people who could neither speak nor hear
5. Alexander Graham Bell worked with Thomas Watson
6. Alexander Graham Bell invented the telephone
. 1. Where was Alexander Graham Bell born ?
In Scotland
2. Where did he emigrate first ?
He emigrated to Canada first
3. Who did Bell work with at Boston University?
Thomas Watson
4. What did Bell invent ?
The telephone
5. Did Bell conduct many experiments in America?
Yes, he did
6. Where did he successfully demonstrate his invention?
At the countless exhibitions
