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Прочитайте текст и выберите утверждение соответствующее содержанию текста Electricity plays a very i...: ответ на тест 781518 - Английский язык

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Electricity plays a very important part both in industry and in agriculture. We use electricity as a means of transportation and communication. A primitive man depended upon fire, smoke or other kind of signals to send his thoughts to his neighbour. And a modern man can talk with someone in some distance. In recent years electricity has made a great contribution to radio communication between the spaceships and also between the austronauts and the Earth. In addition to that we apply electricity in automation and in research. Much of today's scientific research depends on the solution of different difficult mathematical problems, some of which would require days to solve by the used methods. Electrically-operated computers now give the answers to these problems in seconds.
Варианты ответов
  • Electricity is not necessary in agriculture.
  • A primitive man couldn’t live without electricity.
  • With the help of electricity it is possible to communicate between the spaceships and the Earth.
  • There are no problems in scientific research.
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Вопрос задал(а): Анонимный пользователь, 13 Ноябрь 2020 в 01:29
На вопрос ответил(а): Анастасия Степанова, 13 Ноябрь 2020 в 01:29

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Electricity plays a very important part both in industry and in agriculture. We use electricity as a means of transportation and communication. A primitive man depended upon fire, smoke or other kind of signals to send his thoughts to his neighbour. And a modern man can talk with someone in some distance. In recent years electricity has made a great contribution to radio communication between the spaceships and also between the austronauts and the Earth. In addition to that we apply electricity in automation and in research. Much of today's scientific research depends on the solution of different difficult mathematical problems, some of which would require days to solve by the used methods. Electrically-operated computers now give the answers to these problems in seconds.
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Electricity plays a very important part both in industry and in agriculture. We use electricity as a means of transportation and communication. A primitive man depended upon fire, smoke or other kind of signals to send his thoughts to his neighbour. And a modern man can talk with someone in some distance. In recent years electricity has made a great contribution to radio communication between the spaceships and also between the austronauts and the Earth. In addition to that we apply electricity in automation and in research. Much of today's scientific research depends on the solution of different difficult mathematical problems, some of which would require days to solve by the used methods. Electrically-operated computers now give the answers to these problems in seconds.
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Вопрос № 781519

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Radio was invented in Russia. The world’s first receiver was constructed in 1895 by the great Russian scientist Alexander Popov. There were no transmitters then, therefore his receiver could only pick up signals produced by lightning discharges during a thunderstorm. A. Popov demonstrated a device called a “storm indicator” at a meeting of the Russian Physico-Chemical Society in St. Petersburg on May 7, 1895. This day is marked now as Radio Day.

Вопрос № 781520

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Alexander Popov found a way of transmitting Morse code signals. In 1897 he sent the world’s first wireless telegram over a distance of 600 m and four years later the range of transmission was increased to 150 km. Ever since, thanks to the work of many scientists of the world, the methods of transmission and reception have been constantly improved. Nowadays radio communication has no limits.

Вопрос № 781521

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Teletypewriters are widely used for high speed telegraph communications as well as for transmission of written messages. For economical transmission over long distances it is essential that only a single wire or transmission channel be required to carry the signal. Furthermore, the reliable and efficient operation can be secured by using not more than two conditions on the line, such as current and no current, or positive impulses and negative impulses.

Вопрос № 781522

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