[单项选择]

In this section there are several reading passages

followed by a total of twenty multiple-choice questions. Read the passages carefully and then mark your answers on your COLOURED ANSWER SHEET{{/I}}

Telecommunications stand for devices and systems that transmit electronic or optical signals across long distances. Telecommunications enables people around the world to contact one another, to access information instantly, and to communicate from remote areas. Telecommunications usually involves a sender of information and one or more recipients linked by a technology, such as a telephone system, that transmits information from one place to another. Telecommunications enables people to sand and receive personal messages across town, between countries, and to and from outer space. It also provides the key medium for delivering news, data, information, and entertainment.
Telecommunications devices c
A. It converts data from one form to another.
B. It will be out of date soon.
C. It serves as a link between senders and recipients of message.
D. It transmits message more efficiently than other devices.