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Вопрос № 191096 - Английский язык

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What prevents interruption in the signal reception when a caller moves from one geographic area to another?
Варианты ответов
  • Cellular telephones communicating by radiowave does.
  • A central controller keeping track of the movement of the mobile subscriber and automatically rerouting the call does.
  • Large metropolitan areas containing hundreds of thousands of customers does.
  • Modern cellular systems having small dimensions and light weight does.
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Вопрос задал(а): Анонимный пользователь, 10 Ноябрь 2020 в 00:07
На вопрос ответил(а): Анастасия Степанова, 10 Ноябрь 2020 в 00:07

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In an analogue 1_______ network, the caller is connected to the person he wants to talk to by switches at various telephone exchanges. The switches form an electrical connection between two users and the setting of these 2_______ is determined electronically when the caller dials the number. Once the connection is made, the caller’s voice is transformed to an electrical signal using a small microphone in the caller’s handset. This 3_______ signal is then sent through the network to the user at the other end where it 4_______ back into sound by a small speaker in that person’s handset. There is a separate electrical connection that works in reverse, allowing the user to converse.
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Вопрос № 191097

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Вопрос № 191098

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Вопрос № 191099

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Вопрос № 191100

Определите основную идею текста
Environment through which all transmitted signals propagate
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