Прочитайте текст и заполните пропуски подходящими по смыслу словами To measure dimensions such as th...: ответ на тест 223793 - Английский язык

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To measure dimensions such as the length, height, depth or diameter of a component, micrometers are used. There are different types of micrometer for different 1_______.
To measure the external diameter of a small component such as a small shaft, a micrometer caliper is used; to measure internal 2_______, a micrometer cylinder is used. Depth micrometers are used to measure the 3_______ of a component. The measurements are shown on different 4_______ of scale depending on the type of micrometer.

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To measure dimensions such as the length, height, depth or diameter of a component, micrometers are used. There are different types of micrometer for different 1_______.
To measure the external diameter of a small component such as a small shaft, a micrometer caliper is used; to measure internal 2_______, a micrometer cylinder is used. Depth micrometers are used to measure the 3_______ of a component. The measurements are shown on different 4_______ of scale depending on the type of micrometer.

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Riveting is a 1_______ of joining metals permanently. The process consists of drilling or punching the 2_______ plates, inserting the rivet and then 3_______ it by compression force. There are several standard types of rivet heads with 4_______ uses.

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There have been many 1_______ number systems in the world. A long time ago the Babylonians counted in 60s and today computers count in 2s – using only 1 and 0. We call this 2-number system the binary system. Most systems, however, count in 10s. This is because we have 10 2_______. We call this system the decimal system from ‘decem’, the Latin word for 10.
The Romans used letters like I, V, X and C to count in 10s but these are not very easy to use. The numbers most people use today come from India. We think they were invented by the Hindu people there. In the Hindu system the place of each 3_______ is important. For example, 832 is a different number to 238 or 382. The Hindu system was also used by the Arabs, and we now call them Arabic numbers. In about the 12th century an Italian called Leonardo Fibonacci wrote a book about 4_______ numbers, and people all over Europe began using these numbers.
We do not know who invented the decimal point, but we know that in 1585 a man called Simon Stevin wrote  a book about the decimal point. The book was called ‘The Tenth’. Before we knew about the decimal point, we had to use fractions like Ѕ and system ѕ when we talked about numbers smaller than 1.

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The Eiffel Tower is one of Europe’s most famous 1_______. It stands in the Chap de Mars, a park near the River Seine in Paris. It is 300 metres tall and was built by Alexandre Gustave Eiffel for the Paris Universal Exposition in 1889.
Because the tower was such a tall building, Eiffel wanted to make it easy for people to get to the top. He wanted to use a lift, which was a very new 2_______ at the time. Eiffel asked Elisha Otis to design a lift for the building.
The opening of the Eiffel Tower took place on the 10th June 1889. Eiffel himself lived in the 3_______ where he had his own apartment. Many kings and queens were happy to visit the tower during the opening and, of course, they visited Eiffel’s apartment. Although Eiffel designed the tower for people to visit, it was also used for 4_______ experiments. Nowadays, the tower gets twice as many visitors as the other very famous building in Paris – the Louvre.

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Large office buildings are often as big as small towns. They have their own trains, buses and shops. Such buildings can be found in most cities of the world. When it was finished, however, in 1943, the Pentagon was the world’s largest office building. It is still – many years later – among the largest.
Built in the shape of a pentagon – a 1_______ shape – the building consists of five pentagons, divided into ten sections. Each side of the 2_______ pentagon is about 300 metres long. In the centre, there is a large space open to the sky.
Six storeys high, the Pentagon has a 3_______ floor space of about two million square metres. Around it, there are about 45 kilometres of roads that are part of the building and inside the building itself there are over 25 kilometres of passages. In spite of its great 4_______, however, no office is more than a six minute walk from any other office in the building.