Вопрос № 347503 - Английский язык

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Through the years other machines were invented, both to receive and transmit messages. These machines are called teleprinters. They use a code called the International 5-unit teleprinter code instead of the Morse code. It is called a "5-unit" code because a letter or a figure is made up of five impulses of electrical current, either positive or negative - three positive, two negative; one positive, four negative; and so on. All the letters are the same length in time. This is quite different from the Morse code, where E is the shortest and "nought" the longest.

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A lot of people began to see how electro-magnets could be used to send messages. One of the most famous people of all in communication is Samuel Morse. He invented the Morse code. This code is still used in signaling all over the world. His idea was simple. He thought of using time, sending current along a wire for a long time or a short time. Combining different sets of these “impulses”, just using the long or short, he made a code for the whole alphabet, and the numbers from 0 to 9.

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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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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.