单项选择题
A.ignition failure
B.oxygen corrosion of the fuel lines
C.the pistons to seize
D.blue smoke
单项选择题 The condensers located in various stages of a flash evaporator are cooled by（）
单项选择题 Air in the fuel lines to the fuel injection nozzles of a diesel engine will cause the engine to （）
单项选择题 The pressure in an operating diesel engine cylinder continues to rise for a short period after the piston passes top dead center as a result of the （）