阿摩線上測驗
40. Selection of the proper ________ is important for a dieseli engine to avoid sticking of piston rings.
(A) Fuel oil
(B) Hydraulic oil
(C) Lubricating oil
(D) Gasoline oi
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統計： A(7), B(1), C(19), D(0), E(0) #3352446
統計： A(7), B(1), C(19), D(0), E(0) #3352446
