Вопрос № 912159 - Английский язык

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Look at the picture. These are different shapes. They are triangles, squares, rectangles and circles.
Triangles have three sides and three angles. Squares and rectangles have four sides. Squares have four equal sides, but rectangles have two equal sides. Circles do not have angles or sides.

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There are different shapes in the picture. They are triangles, squares, rectangles and circles.
Triangles have three angles. Squares and rectangles have four sides. Squares have four equal sides, but rectangles have two equal sides. Circles do not have angles or sides.
Закончите предложение
Squares and rectangles have _______.

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An electric current is a flow of electricity. There are two kinds of electricity, positive and negative. Glass rubbed with silk is positively charged, ebonite rubbed with fur is negatively charged.
Like charges repel, unlike charges attract. The leaf electroscope is used to detect, distinguish and measure charges.
The ultimate particle of negative electricity is called the electron; that of positive electricity is called the proton.

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Engineering is a very practical activity. It is the process of applying the latest achievements of science and technology into practice.
1_______. Mechanical engineers are experts in the design and manufacture of tools and machines. 2_______.
Electrical engineering deals with producing and applying electricity in various fields of national economy. 3_______.
Components and equipment for computing and communicating are the products of electronic engineering. 4_______.

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Bikes, planes and cars have wheels and tyres. Locomotives have wheels; they do not have tyres. Bikes have two wheels and two tyres. Planes have wings. Bikes, locomotives and cars do not have wings. Locomotives, cars and planes have engines. Bikes do not have engines.
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Cars do not have …

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Heat causes liquids to expand. This effect is used in the thermostat in Fig. 21.2. An increase in air temperature causes the liquid to expand in the heat sensor. This expansion causes the valve to close and consequently the flow of hot water is reduced.
After a time, the temperature will go down and consequently the liquid will cool and contract. The spring load will now be greater than the liquid pressure and consequently the valve will open. Once again, the hot water flow is increased.
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Heat causes liquids to …