单项选择题 Pressurized air enters the cylinder via the inlet ports and pushes the remaining exhaust gas from the cylinder in a process known as “（）”.

单项选择题 It is during （） that work energy is being put into the engine; during the other 3 strokes of the piston, the engine is having to do the work.

单项选择题 In the suction stroke, the crankshaft is rotating clockwise and the piston is moving （） the cylinderThe inlet valve is （） and a fresh charge of air is being drawn or pushed into the cylinder by the turbocharger.