問題詳情

20.A controllable pitch propeller of a diesel-driven vessel eliminates the need for .
(A)friction clutches
(B)disconnect clutches
(C)reversing gears
(D)reduction gears

參考答案

答案：C
難度：適中0.653846
統計：A(0),B(3),C(17),D(4),E(0)