問題詳情

27.Prior to starting a marine diesel engine, the cylinders and pistons must be .
(A)cooled to appropriate temperature
(B) gradually warmed up
(C)opened up and renewed
(D)ground and polished

參考答案

答案：B
難度：適中0.615385
統計：A(5),B(16),C(2),D(1),E(0)