单项选择题
The device used to store a charged pressure for a hydraulic starting system is called the（）
A.reservoir B.hand pump C.accelerator D.accumulator
单项选择题 How dose water enter the crankcase of a diesel engine?（）
单项选择题 Standby or emergency diesel generator day tanks should always be kept full to reduce the possibility of（）
单项选择题 If water is found in the crankcase of a diesel engine, the cause may be due to（）
