問題詳情

23. Diesel fuel oil, having a low cetane number, can result in _____ .
(A) improved cold weather starting
(B) smoother engine operation
(C) combustion knock
(D) reduce ignition lag

參考答案

答案：C
難度：適中0.666667
統計：A(0),B(2),C(8),D(1),E(0)