Прочитайте текст и заполните пропуски подходящими по смыслу словами The range of the 1______________...: ответ на тест 781343 - Английский язык

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The range of the 1______________ use is expanding with 2______________ passing year. The use of picoseconds laser pulses will help to 3______________ faster and more powerful microchips information circuits and computers by mapping more exactly the routes electrons take through semiconductor materials, the rates they travel and the effects of impurities. 4______________ lasers will help research on interactions among molecules in liquids.

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The range of the 1______________ use is expanding with 2______________ passing year. The use of picoseconds laser pulses will help to 3______________ faster and more powerful microchips information circuits and computers by mapping more exactly the routes electrons take through semiconductor materials, the rates they travel and the effects of impurities. 4______________ lasers will help research on interactions among molecules in liquids.

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Lasers are widely used in 1_______________. In Moscow an All-Union Centre for Using Lasers in Surgery has been set up. The first step was made in 1970 by 2_____________ A. Vishnevsky who used a small-capacity 3______________ installation experimenting on animals. Russian scientists have produced Scalpel-1 installation which is widely used in our 4_____________ and is exported to many other countries.

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Lasers are used in 1________________ and in agriculture. Russian scientists have developed a 2______________ instrument - the laser projection 3_______________ (the work received the USSR State Prize). The tremendous brightness of laser radiation 4________________ it possible to project clear images of microobjects onto large screens, magnified 15,000 times.

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Laser beams 1_____________ it possible not only to transmit light 2______________ over great distances, but also to encase it in very thin glass filaments - waveguides. It is possible to transmit simultaneously thousand telephone 3______________ and many 4______________ programmes over a single guide a tenth of a millimetre thick.

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Thermionic emission is the most 1_______________and one most commonly used in electron tubes. In this method 2________________ is heated, resulting in increased thermal or kinetic energy of the unbound electrons. Thus, a greater number of electrons will attain sufficient speed and energy 3________________ from the surface of the emitter. The number of electrons released per unit area of an emitting surface is related to the absolute temperature
of the cathode and a quantity of the work 4_______________must perform when escaping from the emitting surface.