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单选题
A buoy marking a wreck will show a(n)（）.
A
white light FL (2) and a topmark of 2 black spheres
B
occulting green light and may be lettered
C
yellow light and will be numbered
D
continuous quick white light and may be numbered
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考题
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单选题When using a buoy as an aid to navigation which of the following should be considered?（）A
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fixed red lightB
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考题
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考题
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考题
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考题
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考题
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考题
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考题
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fixed red lightB
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考题
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考题
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Green squareB
Red and green banded squareC
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