Вопрос № 223792 - Английский язык

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Most cars use water to cool the 1_______. Water flows from the radiator through a 2_______ of water passages and rubber 3_______. A water pump pushes the water round. This system is known a 4_______ system .

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1_______ is very important for farm animals. The necessary amount of water being unavailable, the cattle may be in poor condition. The 2_______ of water required by livestock depends on the nature of the feed, the size and the activity of the animal and the season. Milk containing about 87 per cent of water, dairy cows must 3_______ large quantities of water for the production of milk. A high-yielding 4_______ is given 8-10 gallons of water per day.

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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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The raw materials for plastics are coal and 1_______, and many plastic materials today are produced from oil. Plastics can be divided into two main 2_______. The first group, called thermoplastics, includes well-known plastics such as PVC, nylon and polythene. These can be treated (heated, softened and cooled) several times, and can be formed into combs, pipes and bags, in addition to many other similar 3_______.
Thermosetting 4_______ include melamine, polyurethane and phenolic resin, and can be made into tableware, foams and plugs respectively. However, this group differs from thermoplastics because they can be treated only once and harden when they are heated.

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 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.