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【单选题】
如果收发两端之间的传输距离为 10km ,信号在媒体上的传输速率为 2.0 × 10 5 km/s ,数据长度为 1000B ,数据发送速率为 100kbit/s ,请问它的发送和传播分别是()A.
8ms 、 50us
B.
0.008s 、 5us
C.
0.00005s 、 0.08s
D.
0.08s 、 0.00005s
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