A 20-meter power-driven vessel pushing ahead or towing alongside will display（）.<br>A:a single white light forward<br>B:two masthead lights in a vertical line<br>C:two towing lights in a vertical line<br>D:two all-round red lights where they can best be seen

A 20-meter power-driven vessel pushing ahead or towing alongside will display（）.
A:a single white light forward
B:two masthead lights in a vertical line
C:two towing lights in a vertical line
D:two all-round red lights where they can best be seen

出自：海船船员证

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