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问答题
Assuming that the length of a channel is 1000m and the propagation rate of a signal on the channel is
Assuming that the length of a channel is 1000m and the propagation rate of a signal on the channel is 
m/s, the propagation delay of a single path is______μs
答案：
5
的一个原函数是
，则
等于（ ）. 
