单项选择题
A.increase the starting air pressure
B.use a higher than normal cranking speed
C.increase the fuel injection pressure
D.use a fuel having a lower ignition temperature
单项选择题 Water accumulation in the cylinder of a secured engine is an indication that the （）
单项选择题 If a diesel engine turned over at normal cranking speed but failed to start, the cause could be late fuel injection or （）
单项选择题 A bronze bearing liner with a lead-tin flashing has a milky-white color over most of its surface and some areas of exposed bronze, the white coloring indicates（）