Вопрос № 223844 - Английский язык

Metals are materials most widely used in industry because of their properties. The study of the production and properties of metals is known as metallurgy.
The separation between the atoms in metals is small, so most metals are dense. The atoms are arranged regularly and can slide over each other. That is why metals are malleable (can be deformed and bent without fracture) and ductile (can be drawn into wire). Metals vary greatly in their properties. For example, lead is soft and can be bent by hand, while iron can only be worked by hammering at red heat.
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Metals are materials most widely used in industry because of their properties. The study of the production and properties of metals is known as metallurgy.
The separation between the atoms in metals is small, so most metals are dense. The atoms are arranged regularly and can slide over each other. That is why metals are malleable (can be deformed and bent without fracture) and ductile (can be drawn into wire). Metals vary greatly in their properties. For example, lead is soft and can be bent by hand, while iron can only be worked by hammering at red heat.

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Steel, copper and aluminium are used in making engineering products.
Steel is a grey plastic material. It is heavier than aluminium but it is the hardest and the strongest of these three metals.
Copper is a red metal. It is harder and stronger than aluminium and more flexible than steel. But copper is the heaviest and the most expensive metal. The lightest and the most flexible of these materials is aluminium. It is a white hard metal.
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What kind of metal is aluminium?

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Many people have just returned from enjoyable holiday in the South West of England. But as well as being a major tourist attraction, this region also contains a healthy industry which provides a wide range of machining services.
The company set up in 1999 is a family-run business. It specializes in the machining of various precision parts.
Two years ago the company bought a new machining centre. ‘Much of our work involves machining different sizes of parts and producing large numbers of holes’, says the managing director. ‘This machine centre will help us become more efficient and reduce the level of skill required for certain key operations.’
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When was the company set up?

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Concrete is the name of artificial stone. The materials from which concrete is formed are sand, pieces of broken stone and cement mixed with water in suitable proportions. These materials are called ingredients of concrete. The sand and broken stone form the skeleton of concrete. Dry cement is an inert powder, but on the addition of water a chemical reaction takes place.
This causes the whole mix to set and harden forming a solid mix.
Water used in concrete mix is ordinary drinking water. It must be free from any impurities. The amount of water added influences the properties of concrete. Concrete products must be manufactured according with existing standards. Having chosen component materials builders must be well familiar with technology of concrete and use them in correct proportions.
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Which materials form the skeleton of concrete?

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One of the centres of the American automobile industry is Detroit. It is located in the southeast of Michigan, on the Detroit River, connecting Lakes Erie and St. Clair, right opposite Windsor, in Canada. It was founded in 1701 by a French trader Antoine de la Monte Cadillac, who built a fort on the river. Later, thanks to Henry Ford, Detroit became the leading centre of the automobile industry. Today about 34.000 cars are produced here every day.
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Whom was Detroit founded by?