Прочитайте текст и заполните пропуски подходящими по смыслу словами Electronic computers are widely ...: ответ на тест 284239 - Английский язык

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Electronic computers are widely used in 1_______________ research аnd industrial designing. Huge radio-telescopes, 2_____________ with sensitive instruments and powerful
amplifiers enable man 3_______________ an insight into the remotest corners of space, discover 4_________________ and puzzling phenomena of nature.

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Electronic computers are widely used in 1_______________ research аnd industrial designing. Huge radio-telescopes, 2_____________ with sensitive instruments and powerful
amplifiers enable man 3_______________ an insight into the remotest corners of space, discover 4_________________ and puzzling phenomena of nature.

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The realm of 1 ______________ of to-day influences almost, every aspect of human activity, while it was only in the beginning of our century that the basic idea, which was to develop into one of the most astonishing sciences of our time, was conceived. It was our Russian 2______________ A. S. Popov, who discovered the principle of wireless 3______________ that finally led to the development of electronic 4______________ for use in various communication devices.

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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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The first semiconductor 1______________ was invented in 1948. It meant another important advance in the development of 2_____________. Semiconductors  possess  a number  of valuable 3______________ over electron  vacuum tubes, - miniature dimensions and high 4______________. Thus electronics became the study of electron motion in solids. The realm of electronics widened still more. This opened up other fields of application for electronics.

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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.