Buoys which only mark the left or right side of the channel will never exhibit a light with which characteristic? （）<br>A:Flashing<br>B:Quick flashing<br>C:Composite group flashing<br>D:Equal interval (isophase)

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)

出自：海船船员证

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