单选题在能见度不良的水域中,多艘被拖船的最后一艘,如配有船员,应以每次不超过()的间隔连续鸣放()的声号。A2分钟;一长两短B1分钟;一长两短C2分钟;一长三短D1分钟;一长三短
单选题
在能见度不良的水域中,多艘被拖船的最后一艘,如配有船员,应以每次不超过()的间隔连续鸣放()的声号。
A
2分钟;一长两短
B
1分钟;一长两短
C
2分钟;一长三短
D
1分钟;一长三短
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