Прочитайте текст и заполните пропуски подходящими по смыслу словами Electronic computers 1__________...: ответ на тест 606835 - Английский язык

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Electronic computers 1______________ the trajectories of spaceships, help prepare, launch and monitor the rockets that carry the most complicated and sophisticated equipment. Radio-electronic 2_____________ ensure reliable communication with space probes at distances amounting to scores of 3______________ of kilometres, relay telephotos of distant planets. Hundreds of 4______________ devices perform various tasks on board every satellite and spaceship. It may be said that in the near future electronics will surely make great strides and help the humanity gain new victories in science and engineering.

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Electronic computers 1______________ the trajectories of spaceships, help prepare, launch and monitor the rockets that carry the most complicated and sophisticated equipment. Radio-electronic 2_____________ ensure reliable communication with space probes at distances amounting to scores of 3______________ of kilometres, relay telephotos of distant planets. Hundreds of 4______________ devices perform various tasks on board every satellite and spaceship. It may be said that in the near future electronics will surely make great strides and help the humanity gain new victories in science and engineering.

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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 2______________ idea, which was 3______________ into one of the most astonishing sciences of our time, was conceived. It was our Russian scientist A. S. Popov, who discovered the principle of wireless 4______________ that finally led to the development of electronic tubes 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 tube was the heart of electronics and, hence, the field of electronics was usually 2_______________ as the study of the motion of electrons in vacuum tubes. However, it was found that small, controlled quantities of gas introduced into a "vacuum tube" could make it perform switching, 3______________ 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  4______________.

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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 advantages over electron vacuum 3______________, - miniature dimensions and high reliability. Thus electronics 4______________ 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 3______________ by a laser is much more intense than ordinary light. With ordinary light, all the light waves are of 4_____________ lengths. With lasers, all the light waves are of the same length, and this increases the intensity.