阿摩線上測驗
20. The speed of a vessel adjusted to that of a pilot boat at which the pilot cab safely embark/disembark, it is:
(A) Boarding speed
(B) Harbor speed
(C) Sea speed
(D) Full speed
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統計： A(274), B(43), C(21), D(3), E(0) #3351412
統計： A(274), B(43), C(21), D(3), E(0) #3351412
