A .186.2Hz
B .131.8Hz
C .123Hz
D .114.8Hz
[单选题]机车台异频呼叫车站台的信令是()。A .186.2HzB .131.8HzC .123HzD .114.8Hz
[单选题]机车台同频呼叫机车台的信令是()。A .186.2HzB .131.8HzC .123HzD .114.8Hz
[单选题]车站同频呼叫机车的信令为()。A .186.2HzB .131.8HzC .114.8HzD .123Hz
[单选题]地面台同频呼叫机车台的信令是()。A .186.2HzB .131.8HzC .114.8HzD .123Hz
[单选题]车站台主呼机车台时,呼叫信令为()。A . 123.0HZB . 186.2HZC . 131.8HZD . 114.8HZ
[单选题]TWC-43机车电台同频呼叫车站的频率()A . 123HzB . 131.5HzC . 114.8Hz
[单选题]地面台异频呼叫机车台的信令是()。A .186.2HzB .131.8HzC .114.8HzD .123Hz
[单选题]地面台同频呼叫地面台的信令是()。A .186.2HzB .131.8HzC .114.8HzD .123Hz
[单选题]机车台呼叫另一机车台,由车站台转信时,应发送()呼叫信号。A . 114.8Hz+186.2HzB . 115.8Hz+186.2HzC . 116.8Hz+186.2HzD . 115.8Hz+188.2Hz
[单选题]车站台异频转信时,机车台发射频率为()。A . f1B . f2C . f3D . f4