单选题When approaching a preferred-channel buoy，the best channel is NOT indicated by the（）.Alight characteristicBcolor of the uppermost bandCshape of an unlighted buoyDcolor of the light
单选题
When approaching a preferred-channel buoy，the best channel is NOT indicated by the（）.
A
light characteristic
B
color of the uppermost band
C
shape of an unlighted buoy
D
color of the light
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