單項(xiàng)選擇題A vessel not using a traffic separation scheme shall avoid it by as（）as is practicable.

A.wide a place
B.wide a margin
C.wide enough
D.wide


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1.單項(xiàng)選擇題Two short blasts of the whistle have all of the following meanings except（）.

A.I intend to meet you starboard to starboard
B.I do not intend to hold course and speed
C.I intend to overtake you on your port side
D.I intend to alter my course to port

2.單項(xiàng)選擇題Under international rules（）.

A.all vessels must carry an after range light
B.vessels less than 50 meters in length need not carry an after range light
C.vessels stopped dead in the water should turn off their range lights
D.vessels over 20 meters in length must carry both range lights from sunset to sunrise