推荐回答（2个）
Telecommunications refers to by telephone, radio and TV remote transmit and receive information. It can make people all over the world contact each other, timely access to information. With the help of telecommunication technology, people can be passed between different countries in different towns and personal information, telecom and transfer important medium of news, information and entertainment. Electrical signal is usually spread in the medium, such as copper wire or in the form of radio waves propagation in the air, and the light signal is usually in the fiber optic cable transmission
Telecommunications refers to the telephone, radio and TV transmitting and receiving information. It can make people around the world are connected with each other, timely access to information. With the help of telecommunication technology, people cantransfer information between different cities in different countries and.Telecommunications is also important media news, information and entertainment. The electrical signal is usually spread in the copper wire, medium or transmitted in the form of radio waves in the air. And the light signal is transmitted in fiber optic cables.
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