Вопрос № 223895 - Английский язык

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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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 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_______. 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_______.

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1_______. Today’s inhabitants of the caves have come here to escape the noise and confusion of modern life. ‘I’ve lived in this cave for twenty years,’ says Hatice Demirci from her beautiful terrace. ‘It’s cool in the summer and warm in the winter. 2_______.’
3_______. They have electricity and water and they believe they enjoy a more healthy and relaxed lifestyle. ‘It’s all natural,’ said Mustafa Yedek, a local tour guide. 4_______. The air is clean; they didn’t use chemicals to build these homes! ‘We think the caves can add a good fifteen years to the length of your life,’ said Mr Yedek.