Pitching is angular motion of the vessel about what axis?（）.
A. Longitudinal
B. Transverse
C. Vertical
D. Centerline
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When comparing different fuels for different engines, the ignition quality of diesel fuel oils becomes a less critical consideration as （）
A. the amount of lube oil additives increase
B. piston speeds increase
C. injection pressure decrease
D. engine speeds decrease
工作信息收集方法中应用最为广泛的方法是（）
A. 问卷法
B. 面谈法
C. 工作日志法
D. 观察法
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