Вопрос № 284238 - Английский язык

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Electronics surrounds us everywhere. Television, tape-recording, radio-receiving - electronics is at the heart of them all. But that is only a small part of 1_______________ and not the most important at that. Extremely complicated electronic systems 2______________ the work of huge plants, enterprises and 3_______________ stations. Electronic appliances are indispensable for planning and controlling our national 4_______________.

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Electronics surrounds us everywhere. Television, tape-recording, radio-receiving - electronics is at the heart of them all. But that is only a small part of 1_______________ and not the most important at that. Extremely 2______________ electronic systems control the work of huge plants, enterprises and 3_______________ stations. Electronic appliances are indispensable for planning and controlling our national _______________.

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Intensive 1______________ of radio-location began in the early forties. All these years the vacuum 2_______________ was the heart of electronics and, hence, the field of 3______________ was usually defined as the study of the motion of electrons in vacuum tubes. However, it was found that small, controlled 4______________ of gas introduced into a "vacuum tube" could make it perform switchings, rectifying and other jobs. To include the category of gas-filled tubes, "vacuum tubes" became converted to "electron tubes" and the science of electronics was expanded to include the study of electron motion in gases.

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A laser is a quantum electronic 1______________. It is a machine for making and concentrating light 2______________ into a very intense beam. The letters LASER stand for Light Amplification by Stimulated Emission of Radiation. The light made by a laser is much more intense than ordinary 3________________. With ordinary light, all the light waves are of different 4________________. With lasers, all the light waves are of the same length, and this increases the intensity.

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The two 1 _______ groups are animal fats and vegetable oils. Butter is a special
2 _______ product from milk. The vegetable 3 _______ are pressed or extracted from a variety of plant seeds. Of primary importance as sources of edible oils are
4 _______, sunflower, cotton seed, corn germ, olives, etc.

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Eggs are versatile, easy to use, easy to digest and most people like them. Store them in a cool place, larder or refrigerator. Brown or white eggs? The answer is that it does not matter, the 1______ is only in the eye of the 2_______. In America they pay extra for 3________ white ones, the British do the same for dark brown. Boil them, 4________ them, fry them with bacon, make an omelet, make mayonnaise.