Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
The invention of the phonograph happened quite by accident. Thomas Edison moved to Menlo Park, New Jersy in 1876, where he established an industrial research laboratory. There, Edison was working on a carbon telephone transmitter to improve the existing Bell telephone system.
In that laboratory a year later, Edison invented the phonograph while he was trying to
improve a telegraph repeater. He attached a telephone diaphragm to the needle in the telegraph
repeater; in this way, he was able to reproduce a recording that could be played back. After he made some improvements to the machine, he tested it. He recited “Mary Had a Little Lamb” into the machine and played his voice back to a very surprised audience.
a)Was the phonograph an accidental invention
Yes, it was.
26. What is the best title for the passage?
A. Thomas Edison’s many inventions
B. Improvements in telephone and telegraph
C. The History of Menlo Park
D. An accidental invention
27. In what year did the invention of phnograph occur?
A. 1876 B. 1877 C. 1878 D. the article does not say
28. What was Edison working on when he created the phonograph?
A. A telegraph repeater B. A telegraph diaphragm
C. A telephone repeater D. A telephone diaphragm
29. According to the passage, how was the phonograph made?
A. With a telephone needle and a recorder
B. From a recording of a telegraph
C. With only a telegraph repeater
D. From a combination of telephone & telegraph part
30. According to the passage, how did Edison test his new invention?
A. He made improvements to the machine.
B. He used a carbon transmitter.
C. He read a children’s rhyme.
D. He produced the audience voice.
A. Choose the correct answer
it seems entirely (1) to us that there're teams of scientists in universities and other institutions around the world, attempting to (2) the way the world works. however it hasn't always been that (3) . although the scientific method is now four or five hundred years old the ancient Greeks for example believed that they could work out the (4) of natural events just by the power of thought
during the 17th century more and more people began to realise that they could(5) their scientific ideas by designing a relevant (6) and seeing what happened . a lot of (7) was made in this way by individual scientists. these men and women often worked alone carrying out (8) into many different areas of science, and they often received very little (9) for their hard work. at the start of the 20th century though it became (10) the science was becoming more complicated and more expensive. the individual scientist disappeared to be replaced by highly qualified teams of experts. modern science was born
1. physical-natural-typical-real
2. create-invent-construct-discover
3. route-method-way-technique
4.aims-reasons-causes-impulses
5.calculate-estimate-measure-test
6. experiment-research-attemp-analysis
7. development-movement-progress-evolution
8. experiment-research-discovery-education
9. award-prize-gift-reward
10. clear-true-accurate-actual
B. circle the correct word
1. many materials have been used for artificial / false teeth including wood
2. be careful. you might give yourself an electric/electronic shock
3.i'm afraid the problem with your washing machine is the engine/motor
4. many employers in the chemicals industry/factory object to the new law
5. my computing exam is taking place/occuring next week
6. technology is a fundamental part of new/modern life
7. we had our car serviced and it seems there's a problem with the engine/machine
This scientist is doing an experiment / innovation in a data / laboratory.He's probably testing a theory / knowledge as a part of his research / discovery. The results / machine could lead to a new medical application
Cảm ơn bạn nhiều lắm