4. Horizontal fore or aft motion of a vessel is known as __________ .
(A) pitching
(B) surging
(C) swaying
(D) rolling
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統計: A(232), B(364), C(92), D(100), E(0) #2108636
統計: A(232), B(364), C(92), D(100), E(0) #2108636