单项选择题
The insertion of shims between the foot of a marine type connecting rod and a bearing box would result in （）
A.increased compression ratio B.decreased compression ratio C.increased bearing clearance D.decreased bearing clearance
单项选择题 Which of the following statements is true concerning the cetane number rating of diesel fuel? （）
单项选择题 Which of the following statements is true concerning the cetane number of diesel fuel?（）
单项选择题 Fuel oil having a low cetane rating could result in（）
