問題詳情
4. Which one is not the main function of detergent lubricating oil?
(A) Reducing wear of piston ring
(B) Preventing agglomeration and deposition in the engine
(C) Lowering pressure of combustion in engine
(D) Reducing wear of cylinder
參考答案
答案：C
難度：適中0.686747
統計：A(20),B(26),C(114),D(6),E(0)