单选题A vessel transferring provisions or cargo at sea shall display during the day（）.Atwo black balls in a vertical lineBthree black balls in a vertical lineCthree shapes in a vertical line； the highest and lowest shall be red balls and the middle a white diamondDthree black shapes in a vertical line； the highest and lowest shall be balls and the middle one a diamond
单选题
A vessel transferring provisions or cargo at sea shall display during the day（）.
A
two black balls in a vertical line
B
three black balls in a vertical line
C
three shapes in a vertical line； the highest and lowest shall be red balls and the middle a white diamond
D
three black shapes in a vertical line； the highest and lowest shall be balls and the middle one a diamond
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