Вопрос № 911486 - Английский язык

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CAUTION: A ladder can be a very 1_______ tool. Any of these accidents could happen to you. (a) The ladder could slip on an oily 2_______ and you could fall off; (b) the top could fall backwards; (c) a door could open and push the 3_______ backwards or to the side; (d) a metal ladder could touch an 4_______ wire and give you an electric shock; (e) a ladder could fall off boxes or drums.

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There are many superstitions in Britain. But one of the most widely held is that it is unlucky to open an umbrella in the house. 1_______. The person who opens an umbrella in fine weather is very unpopular.
It's very unlucky to walk under a ladder. If you must pass under a ladder you can avoid bad luck by crossing your fingers and keeping them crossed until you've seen a dog.
The number 13 is said to be unlucky for some. 2_______.
The worst misfortune that can befall you is breaking a mirror. That will bring you seven years of bad luck. 3_______.
And at last there is a superstition of touching wood for luck. 4_______.

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A solid body has a definite form, and tends to keep it; a liquid body must be kept in a vessel and adapts itself to the shape of that vessel, but so as to keep its upper surface horizontal, it tends, moreover, to flow from a higher to lower level. A gas, or a gaseous body, cannot be kept in an open vessel, but must be kept in a vessel closed in all sides; it always fills the vessel completely.

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Safety Engineering
This field of engineering has its subject the prevention of accidents. Safety engineers develop methods and procedures to safeguard workers of hazardous occupations. They also assist in designing machinery, factories, ships, and roads, suggesting alternations and improvements to reduce accidents.

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The Arabic system of numerical notation is used in most parts of the world today. This system was first developed in India in the 3rd century BC. At that time the numerals 1, 4, and 6 were written in the same form as today.
The important innovation in the Arabic system was the use of positional notation, in which individual number symbols assume different values according to their position in the written numeral. Positional notation is made possible by the use of a symbol for zero. The symbol 0 makes it possible to differentiate between 11, 101, and 1,001 without the use of additional symbols, and all numbers can be expressed in terms of ten symbols, the numerals from 1 to 9 plus 0. Positional notation also greatly simplifies all forms of written numerical calculation.

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Dynamo is a common device for converting mechanical energy into electric energy. This process depends on the fact that if an electrical conductor moves across a magnetic field, an electric current flows in the conductor.
Usually a dynamo includes an electromagnet, called the field magnet, between the poles of which a suitable conductor, usually in the form of a coil, called the armature, is rotated. The mechanical energy of the rotation, in the form of a current in the armature, is thus converted into electric energy.