Вопрос № 223893 - Английский язык

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1_______. 2_______. Technology makes things happen. 3_______. For example, people had made different objects from iron for centuries before they learnt the structure of the metal. 4_______.

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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_______. Science covers the broad field of knowledge that deals with facts and the relationship among these facts.
2_______. Some scientists search for clues to the origin of the universe. 3________.Other researchers investigate why we act the way we do, or try to solve complicated mathematical problems.
Scientists use systematic methods of study to make observations and collect facts. 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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1_______. The laser medium can be a solid, gas, liquid or semiconductor.
2_______. A ruby laser is a solid-state laser which emits at a wavelength of 694 nm. 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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Henry Royce did not like his Decauville car, which ran badly and often broke down. 1_______. Charles Rolls, a car manufacturer, was very impressed by Royce’s car, and soon Rolls and Royce went into business together. 2_______. In 1907, a Silver Ghost broke the world’s endurance record by driving 14,371 miles (23,120km) without breaking down once. After the drive, it cost over Ј2 to put the car back into the perfect condition. 3_______. Rolls-Royce cars are famous for running quietly: an advertisement for one model said ‘the loudest noise is the ticking of the clock’. 4_______. A lot of the work is done by hand, and they take a long time to manufacture: only twelve cars leave the factory every day.