Ответы на вопрос:
Ihave a pet.it is a hamster.it is very funny and nice animal.he is clever and agile.
1who worked out the theory of radio receiving devices? 2 what did a. popov invent? 3 how did the invention affect radio devices? 4 what are the main parameters of radio receivers? 5 does sensitivity mean a measure of the receiver's ability to receive weak signals? 6 which parameter means the ability of the receiver to reject undesirable signals? 7 what does fidelity mean? 8 the principle of operation of the radio receiver is not very difficult understand, is it? 9 are there various types of receivers? 10 where are used communication receivers? 11 are broadcast receivers used in radio, telephone and telegraph service or in sound and visual programms?
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