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單項(xiàng)選擇題

A vessel restricted in her ability to maneuver is one which（）.

A.through some exceptional circumstance is unable to maneuver as required by the Rules
B.from the nature of her work is unable to maneuver as required by the Rules
C.due to adverse weather conditions is unable to maneuver as required by the Rules
D.has lost steering and is unable to maneuver

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