Вопрос № 105648 - Английский язык

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The television receiver includes tube circuits for receiving, amplifying, and synchronizing the signals, and a large cathod tube called a kinescope. This part of the device converts the video impulses from the transmitting station into luminous spots on a fluorescent screen. In the kinescope the amplified video signals are applied to the grid, and through it control the intensity of the electron beam.

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No doubt colour television will eventually supersede black-and-white transmissions. But there are other revolutionary developments to come, such as the “flat” screen - it will replace the conventional receiver box with its cathode-ray tube. The first screen, which can be hung on the wall like a picture, may be no more than 2 to 3 inches thick. It has a fluorescent coating like conventional tubes, but the electrons from the cathode move almost parallel with it instead of striking it at a right angle. They start their journey from an electronic “gun” at the top behind the screen, shooting downwards; at the bottom they are reflected by a “reversing lens” to travel vertically upwards along the screen, which they eventually hit by the influence of a grid of conductors which accumulate electric charges from the electron beam and give them off to the screen. The flat screen will be especially suitable for colour reception.

Although each school in England decides its own _______, they must include certain compulsory subjects.

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The expected _____ of unemployment this year is higher than the previous one.

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_____ usually shows that you are interested in what the person is saying.

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Harvard University is the oldest institution of higher _____ in the USA.