单选题Buoys which only mark the left or right side of the channel will never exhibit a light with which characteristic? （）AFlashingBQuick flashingCComposite group flashingDEqual interval (isophase)
单选题
Buoys which only mark the left or right side of the channel will never exhibit a light with which characteristic? （）
A
Flashing
B
Quick flashing
C
Composite group flashing
D
Equal interval (isophase)
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