问题
单项选择题
三接近区段，进站信号机开放绿黄灯信号时，FS盘输出（）的移频信号。
A.16.9Hz
B.13.6Hz
C.11.4Hz
答案
参考答案：B
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三接近区段，进站信号机开放绿黄灯信号时，FS盘输出（）的移频信号。
A.16.9Hz
B.13.6Hz
C.11.4Hz
参考答案：B
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