单项选择题
A.air B.heat C.sludge D.steam
Vents are led from the engine to head tank （） from the ...
单项选择题Vents are led from the engine to head tank （） from the cooling water.
A.for the release of air B.for the release of water C.in order to the release of air D.because the release of air
Vee-type engines have the connecting rods from two cyli...
单项选择题Vee-type engines have the connecting rods from two cylinders connected to each （） of the crankshaft.
A.throw B.web C.main bearing D.deflection
Valve overlap is the period during which （）.A.the inlet...
单项选择题Valve overlap is the period during which （）.
A.the inlet valve is open B.the exhaust valve is open C.both valves are closed D.both valves are open
