Вопрос № 627657 - Английский язык

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A telecommunication system consists of three basic elements:
– a transmitter that takes information and converts it to a signal;
– a transmission medium that carries the signal; and,
– a receiver that receives the signal and converts it back into usable information.
For example, in a radio broadcast the broadcast tower is the transmitter, free space is the transmission medium and the radio is the receiver. Often telecommunication systems are two-way with a single device acting as both a transmitter and receiver or transceiver. For example, a mobile phone is a transceiver.
Telecommunication over a phone line is called point-to-point communication because it is between one transmitter and one receiver. Telecommunication through radio broadcasts is called broadcast communication because it is between one powerful transmitter and numerous receivers.

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1 _______. The work of chewing is done by the gizzard, the part, the part of the bird’s stomach where the food is ground up. 2 _______. After food is swallowed, it passes into a space called a “crop”, in the chicken’s gullet, or throat. 3 _______. Then the food passes into the gizzard. 4 _______.

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The crackle heard in radio receiver can also be produced by switching of high-voltage power lines.

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The use of HF/DF was given much credit, along with microwave radar, for the eventual defeat of the very serious German submarines threat.

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Short wave can be transmitted on larger frequency than long or medium wave.

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The receivers have perfectly accurate clocks as a rule.