Вопрос № 223894 - Английский язык

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.1_______. Science covers the broad field of knowledge that deals with facts and the relationship among these facts. Scientists study a wide variety of subjects. 2_______. They examine the structure of the cells of living plants and animals. 3________. Scientists use systematic methods of study to make observations and collect facts. 4_______.

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The word “science” comes from the Latin word “scientia”, which means knowledge. Science covers the broad field of knowledge that deals with facts and the relationship among these facts.
Scientists study a wide variety of subjects. Some scientists search for clues to the origin of the universe and examine the structure of the cells of living plants and animals. 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 data. They develop theories that help them order and unify facts. Scientific theories consist of general principles or laws that attempt to explain how and why something happens or has happened.
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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.

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Sometimes the tides are very high and this can be a big problem for the towns near the cost. 1_______. London has a special mechanical ‘wall’ to stop the tide coming into the city.
2_______. In some places, the sea goes out a very long way. In the summer, for example, you can walk from England to Wales! As the tide comes in and goes out, it cleans the beaches.
In the ports, the ships wait for the high tide. 3______.
The tides can also help to make electricity.
4_______.