A drawbridge may use visual signals to acknowledge a vessel’s request to open the draw. Which signal indicates that the draw will NOT be opened immediately?（） -题库考试答案搜索网

A drawbridge may use visual signals to acknowledge a vessel’s request to open the draw. Which signal indicates that the draw will NOT be opened immediately?（）

单选题

2022-01-04 01:12

A、A flashing amber light
B、A fixed red light
C、A white flag raised and lowered vertically
D、A flashing white light

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正确答案

B

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