单选题A vessel in distress should send by radio telephone the two tone alarm signal followed immediately by the（）.Adistress positionBspoken words Mayday，Mayday，MaydayCship's nameDship's call letters
单选题
A vessel in distress should send by radio telephone the two tone alarm signal followed immediately by the（）.
A
distress position
B
spoken words Mayday，Mayday，Mayday
C
ship's name
D
ship's call letters
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