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问题详情

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?（）

A、A flashing amber light

B、A fixed red light

C、A white flag raised and lowered vertically

D、A flashing white light

时间：2022-01-04 01:12 关键词：各种英文申请书

答案解析

B

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