Вопрос № 223399 - Английский язык

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Any chemically and physically homogeneous mixture of two or more substances is said to be a solution. It is possible to have solution of solids in liquids, liquids in liquids, gases in liquids, solids in solids, etc.
Depending on the size of the dispersed particles we recognize true solutions, colloidal solutions and suspensions.

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In explaining the watery solution of sugar, it has been stated that the 1_______ of such solutions divides the sugar into particles, called 2_______, so small that they cannot be seen with the naked eye. These molecules are distinguished by the great speed at which they 3________. Molecules, which are found in all substances, travel fastest in gases, less rapidly in 4_______, and very slowly in solids.

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For some drugs the addition of auxiliary substances is found to be necessary to overcome certain difficulties in their tabletting.
The application of different pressure during tabletting plays a very important role. Tablets that should dissolve in the mouth, must be more strongly compressed than the tablets for internal administration.

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The water for drinking and domestic purposes is generally supplied by rivers, lakes, wells and springs. Such waters usually contain salts of calcium, iron, magnesium, potassium, sodium, organic matters and traces of different gases from the atmosphere. There is also a variety of suspended matter in natural water.

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At any chemist’s all the drugs are kept in drug cabinets. Each medicine has a label on it. White labels include drugs for internal use, yellow – for external use and blue – for injections. The doze to be taken and directions for the administration are also indicated on a label. It is very important for chemists, nurses, doctors and patients themselves. It prevents confusing different remedies, some of which are poisonous.
Their over dosage may cause unfavourable reactions and even death.

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In medicine the microchip will make the greatest changes to our lives. In the near future we shall all be able to have electronic parts for our bodies that will not wear out. We shall be able to do many things faster and better than we can do now. We shall be able to live much longer.