A modem is a device that converts between analog and digital signals, making it possible for a computer to transmit information over a standard telephone line. ( )
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One megabyte equals approximately 10,000 bytes. ( )
A. 对
B. 错
When power is removed, information in ROM is remained. ( )
A. 对
B. 错
Scanner is an example of the output hardware.( )
A. 对
B. 错
WAN shares the feature that they are limited in range: typically they cover one building. ( )
A. 对
B. 错