Вопрос № 223766 - Английский язык

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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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Engineering is a very practical activity. It is the process of applying the latest achievements of science and technology into practice.
There are a lot of branches in engineering. Mechanical engineers are experts in the design and manufacture of tools and machines. Mechanical engineering has marine, automobile, aeronautical, heating and ventilating branches.

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Yesterday from 4 till 6 o’clock Ann and Alice were working in the laboratory. They were studying different electrical devices and instruments. One of them, a multimeter, was on their demonstration table all the time.
The multimeter is used for measuring three types of electrical units, namely: voltage, resistance and current. This device has several scales, a needle, a function selector, two leads, a crocodile clip and a probe.

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Wood used for construction purposes is usually changed into laminated wood or wood panel products. Large structural wooden members are produced by glueing small strips of wood together.
Wood in panel form is more advantageous for many building purposes than board. Why is it so? First of all, because wood panels are much easier to install than boards. They require much less labour for the process of installation. Besides, swelling and splitting in panels are greatly decreased compared with boards. As to plywood panels, they are made up of thin wooden veneers glued together. It is of great importance to note that when wooden structures are designed the future stresses of their structural members must be predetermined.

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Henry Cavendish was born in 1731 and died in 1810. He was an English nobleman who did scientific experiments as a hobby. In 1781 he made the important discovery that water is not an element but a compound of the gases we now call hydrogen and oxygen. He described his experiments to the Royal Society in 1785. His method was new. He showed that if electric sparks are passed through a mixture of hydrogen and oxygen the two gases combine explosively and form water. This was a dangerous experiment. Cavendish did his experiment safely; he wisely used a strong brass container for the gases. He also passed electric sparks through air and found that gases which readily dissolve in water form acids. We explain this reaction today as follows: oxygen and nitrogen combine and form oxides of nitrogen.
Cavendish also noticed that air contained a small proportion of a gas which did not combine with any other gas even if we pass electric sparks through it for a long time. Now we think that this gas was probably argon, one of the inert gases. It was rediscovered many years later.

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In algebra, letters are used to express the general properties of numbers. Representing one number by the letter a and another by the letter b, we can write the equality.
                                   a x b=b x a
or, more shortly, ab=ba.
If no other sign is indicated, the multiplication sign is understood between any two letters written side by side.
To represent numbers letters of the Latin alphabet are generally used.