单项选择题

The rule regarding look-outs applies（）.

A.in restricted visibility
B.between dusk and dawn
C.in heavy traffic
D.All of the above

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单项选择题

A.the prevention of collision
B.the promotion of the traffic flow
C.the complying of port regulation
D.the development of navigational technique

单项选择题

A.adopted
B.adapted
C.adjusted
D.admitted

单项选择题

A.from right side
B.from left side
C.at the termination
D.from either side