31. A direct-coupled propulsion engine cannot operate unaided since it requires service pumps for.
(A)cooling and lubrication
(B)moving
(C)rotating
(D)shifting

答案：登入後查看
統計： A(4), B(0), C(0), D(0), E(0) #3478209

詳解 (共 1 筆)

#6714086
題目解析 題目要求我們找出「直接耦合推...
(共 810 字，隱藏中）
前往觀看
0
0