Вопрос № 348064 - Английский язык

Прочитайте текст и заполните пропуски подходящими по смыслу словами 1_______ metals are based on iron. They are usually 2_______ with carbon because it increases the strength of 3_______ and makes it much more useful to the engineer. Slight variations in carbon content can make very great differences in the properties of the metal. Wrought iron is a ferrous metal with carbon content of less than 0.05 %. Chains and 4_______ can be produced from this alloy.

Прочитайте текст и заполните пропуски подходящими по смыслу словами 1_______ metals are based on iron. They are usually 2_______ with carbon because it increases the strength of iron and makes it much more useful to the engineer. Slight variations in carbon content can make very great differences in the properties of the 3_______. Wrought iron is a ferrous metal with carbon content of less than 0,05 %. Chains and 4_______ can be produced from this alloy.

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

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Man has always tried 1_______ his standard of living by changing his surroundings and by making tools to simplify the everyday tasks necessary for his existence. At first, the only 2_______ he could use were those he could see around him – stone, wood and so on. He survived in competition with other animals because of his abilities with his 3_______ and their coordination with his brain. Because he did not have 4_______ and speed of some animals, his survival depended on his skillful use to get food and to keep him warm and safe.

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A variety of housing has been provided in new towns, including two-storey houses, bungalows, flats and maisonettes. The greatest demand is for 1_______ with gardens. Many families moving to the new towns have previously lived in overcrowded conditions in flats or rooms in the centres of cities and want the space and freedom of a house and 2_______ where children can play in safety. In view of this preference, care is taken to provide houses of varied 3_______ types, avoiding monotony and ensuring privacy. Houses may, for example, be built in courts, closes, terraces or other groupings and set various distances from, and angles to, roads. A number of 4_______ such as bricks and cements of different colours and panels of natural timber are also used.

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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 fingers. We call this system the decimal 2_______ 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 3_______ by the Hindu people there. In the Hindu system the place of each number 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.