单项选择题
For a generator engine, after passing through the turbine the exhaust gas may be conducted out into the （）.
A.intercooler B.open air C.oil fired boiler D.B and C
单项选择题 For a diesel engine, when the piston is at the （）, the clearance volume is the largest.
单项选择题 Fix the fuel injector into （） after repair.
单项选择题 Failure of fuel injection is usually due to trouble in the （）.
