RS-232-C的电气特性采用V.28标准电路,允许的数据速率是( ),传输距离不大于( )。
问题1选项
A.1Kb/s
B.20Kb/s
C.100Kb/s
D.1Mb/s
问题2选项
A.1m
B.15m
C.100m
D.1Km
正确答案及解析
正确答案
解析
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