17. ________ is desirable to improve the comfort of passengers and crew aboard.
(A) Ship stabilization
(B) Engine operation
(C) Ship structure
(D) Engine Controllability
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統計: A(66), B(11), C(9), D(12), E(0) #3833321
統計: A(66), B(11), C(9), D(12), E(0) #3833321