单选题DSCF/HF值班接收机必须自动扫描接收；（）A2187.5KHZ/156.525KHZB8414.5KHZ/156.525KHZC2187.5KHZ/8414.5KHZD2187.5/8414.5/156.525KHZ
单选题
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
参考解析
解析：
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