You are approaching a vertical lift bridge.You know the span is fully open when（）. -题库考试答案搜索网

You are approaching a vertical lift bridge.You know the span is fully open when（）.

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2022-01-02 08:55

A、Three white lights in a vertical line are lit
B、A red light starts to flash at about 60 times a minute
C、A yellow light is illuminated on the bridge pier
D、There is a range of green lights under the lift spa

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标签：沿海与大洋航行

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