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单选题
1977. 系统中显示由脉冲编码传输而来的信息的部分。包括电报机、选择呼叫系统,呼叫选择系统等。
A
That portion of the system which presents information derived from pulse-coded transmissions. Includes telephone exchange, SELCAL, CALSEL, etc.
B
That portion of the system which presents information derived from sine wave-coded transmissions. Includes Teleprinter, SELCAL, CALSEL, etc.
C
That portion of the system which presents information derived from pulse-coded transmissions. Includes Teleprinter, SELCAL, CALSEL, etc.
答案解析
正确答案：C
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