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单选题
Engine system includes the components and units used to control and direct the flow of lubrication through the engine from the inlet fitting to the outlet fitting.
A
A.发动机系统包含元件和部件用于控制和改变润滑剂在发动机入口和出口的流动。
B
B.发动机系统包含控制和引导润滑油从进口流向出口的组件和部件。
C
C.润滑剂靠发动机的元件和部件的控制和引导在发动机里产生流动。
答案解析
正确答案：B
相关知识点：
发动机系含啥件，管啥流
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