---

In conventional systems, the injection pressure（）, while it’s（）in common rail diesel engines.
A:fluctuates with the engine speed to some extent, independent of the engine speed
B:keeps constant at all engine speed, dependent on the engine speed to some extent
C:keeps constant at all engine speed, independent of the engine speed
D:is decided by the engine speed, constant at all engine speed

---

出自：海船船员证

显示答案