Engines with cylinders arranged in a straight line are called ________.
A. V-type engines
B. boxer engines
C. W-type engines
D. inline engines
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Each of the following engines has two cylinder heads, except _________.
A. inline engine
B. V-type engine
C. W-type engine
D. boxer engine
Generally, one working cycle contains four strokes.
A. 对
B. 错
In the first stroke, both intake and exhaust valves are opened.
A. 对
B. 错
In the exhaust stroke, the piston moves downwards to push the burned gases out of the cylinder.
A. 对
B. 错