铁路信号工ZPW-2000轨道电路单项选择题每日一练(2017.08.14)

A.16.1
B.24.7
C.17
D.11.4

A.50
B.100
C.150
D.200

A.16
B.24
C.36
D.48

A.发送盒
B.接收盒
C.衰耗盒

A.2
B.4
C.8
D.16