单项选择题
A.expansion of the combustion gases
B.exhaust and intake valves just closing
C.maximum compression is just being attained
D.fuel injection occurring at that point and combustion begins
单项选择题 If a diesel engine runs out of fuel, you can expect trouble from （）
单项选择题 In a flash type evaporator, the brine overboard pump is vented directly to the（）
单项选择题 In the two stage flash distilling plant, which of the pumps listed is vented to the shell of the second stage in order to remove vapor from the pump suction?（）