DSCF/HF值班接收机必须自动扫描接收;()
A:2187.5KHZ/156.525KHZ
B:8414.5KHZ/156.525KHZ
C:2187.5KHZ/8414.5KHZ
D:2187.5/8414.5/156.525KHZ
出自:船舶GMDSS证