Вопрос № 347513 - Английский язык

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For television fans who can’t make up their minds about which station to watch, a Taiwanese manufacturer has come up with a solution. The firm has introduced a three-screen television set. The unit features a 19-inch (47.5 cm), colour screen flanked on one side by a pair of 5-inch (12.5 cm), black-and-white screens mounted one above the other. Three channels can be watched at once, and using a remote control a viewer can rotate simultaneous broadcasts from one screen to another simply by pressing a button. One or both of the similar screens can also be hooked up to a closed-circuit camera, thus functioning as a security-surveillance monitor.

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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.

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How does digital television work? Basically it performs by splitting the continuous analogue signal into a series of separate pulses. A continuously varying electric signal generated by a usual broadcasting camera is fed into an electronic device which converts it into pulses. These pulses represent binary recordings of the signal’s values at any given moment. At the receiving end of the circuit, the digital signal of binary pulses can be unscrambled back into the analogue signal which is then fed into ordinary TV sets. But the advantages of digital techniques can themselves be used in TV sets in order to improve their reception qualities considerably.

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There are different stories about the beginning of Uncle Sam, but that one Congress officially recognized in 1961 is the story that follows.
Samuel Wilson was born in Arlington, Massachusetts in 1766. He fought in the Revolutionary War with his father and brothers. When the war was over, he moved to Troy, New York. He started a meatpacking business and was well-respected in the community. During the war of 1812, Sam Wilson supplied meat to the U.S. Army in barrels marked U.S. Then asked what the U.S. stood for, one of Wilson’s workers said, Uncle Sam Wilson, the meatpacker. The story gained popularity when it was printed. Soon many things labelled U.S. were being called Uncle Sam’s, not just meat!
After the war, Uncle Sam became the symbol of the nation. People drew him and dressed up like him. Uncle Sam is a U.S.’s symbol that is middle recognized all over the world.

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The two major 1_______ 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 soybeans, sunflower, cotton seed, corn germ, 4_______, etc.

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Some fast foods contain a lot of 1_______ and sugar. Some health 2_______ believe that high-fat and 3_______ foods change children’s behavior. A recent survey in Japan found that badly behaved children ate more 4_______ than well-behaved children.