回拨损耗测量反映的是电缆的阻抗一致性性能。
参考答案:对
一送多受轨道电路,同一道岔区段最多不应超过()个接收端。
A socket is composed of two addresses: (72) 。
A.MAC address and IP address
B.MAC address and port address
C.port number and IP address
D.E-mail address and IP address