During the day，a dredge will indicate the side on which it is safe to pass by displaying（）. -题库考试答案搜索网

During the day，a dredge will indicate the side on which it is safe to pass by displaying（）.

单选题

2022-06-21 13:40

A、two balls in a vertical line
B、two diamonds in a vertical line
C、a single black ball
D、no shape is shown during the day

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正确答案

B

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标签：船员职务名称

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