单项选择题

A towing light，according to the Rules，is a（）.

A.white light
B.red light
C.yellow light
D.blue light

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单项选择题

A.special flashing light
B.anchor light
C.sternlight
D.masthead light

单项选择题

A.only if she is towing astern
B.only if the tow exceeds 200 meters
C.at any time when towing
D.if the towing vessel is part of a composite unit

单项选择题

A.Triangular
B.Diamond
C.Circular
D.Octagonal