Вопрос № 782202 - Английский язык

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 Scientific theories consist of general principles or laws that attempt to explain how and why something happens or has happened.  1_______.
2_______. As scientific knowledge has grown and become more complicated,
many new fields of science have appeared. 3_______. Numerous areas of science overlap each other and it is often hard to tell where one science ends and another begins. 4_______.

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1_______.  A theory is considered to become a part of scientific knowledge if it has been tested experimentally and proved to be true.
2_______. As scientific knowledge has grown and become more complicated,
many new fields of science have appeared. 3_______. Numerous areas of science overlap each other and it is often hard to tell where one science ends and another begins. 4_______.

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There are many different types of lasers. 1_______. The first type of laser was called a ruby laser.2_______. Other lasing mediums can be selected based on the desired emission wavelength, power needed and pulse duration. 3_______. The reason that CO2 laser is so dangerous is because it emits laser light in the infrared and microwave region of the spectrum. 4_______.

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 The Montgoflfier brothers built the first hot-air balloon in France.
1_______. They went up in a basket on September 19th, 1783. The balloon flew for about three kilometers.
 2_______. They travelled nine kilometers in twenty-five minutes.
3_______. The balloonists were two Englishmen in India. The biggest hot-air balloon is the Gerald A. Heineken. 4_______.

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Lifts are controlled by a microprocessor in the machine room.This logs all passenger calls and monitors the number of passengers travelling from floor to floor, the position of any car in the system, and its speed. 1 _______. Lifts have many safety devices which make it virtually impossible for an accident to happen. 2 _______. Each one is strong enough to support the car. If the car starts too quickly, a governor or safety brake locks the car to the guide rails. 3 _______. Doors on the car ensure that no passenger can be injured by contact with the shaft. The car cannot move until both sets of doors are closed. 4 _______. All these things combined make travel in lifts one of the safest journeys you can make!

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For large-screen and wide-screen TVs, the sockets come with double-focus gaps. The socket works from 29.1 to 32.5 mm and base pin circles of 15.24 mm. To save time in connection, the sockets come with two high-voltage wires that offer a snap-in format. Engineers can remove these wires from the socket easily, for maintenance. At the same time, the compact design saves space in board mounting. With a DC 20 kV/min. withstanding voltage, the socket offers an insulation resistance greater than 10,000Щ at DC 1 kV. The spark discharge start voltage equals DC 14 to 17 kV for the number 1 and 2 pins, DC 1.2 to 2.4 kV for number 8 pin, and DC 1 to 2.2 kV for the number 6, 7, 9, 10, 11 and 12 pins.
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Engineers can remove these wires from the socket easily, _______.