30.“A vessel restricted by her ability to manoeuvre by the nature of her work”係指：
(A)危險船舶
(B)操縱失靈船舶
(C)吃水受限制船舶
(D)因工作性質而操縱受限制船舶

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統計： A(0), B(9), C(7), D(51), E(0) #1205291