题目内容

All automobileengines are ________.

A. internal combustion engines
B. reciprocating engines
C. steam engines
D. rotary engines

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Engines with cylinders arranged in a straight line are called ________.

A. V-type engines
B. boxer engines
C. W-type engines
D. inline engines

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