99色精品-9色在线-99色在线-99色视频国产欧美日产一区二区三区_亚洲精品亚洲人成在线观看_四虎在线精品永久观看_免费一级a一片久久精

<pre id="9lbdq"><strong id="9lbdq"></strong></pre>

單項(xiàng)選擇題

In describing engine operation, what does the term “cycle” mean?（）

A.The sequence of events that produce a power pulse
B.One rotation of the engine crankshaft
C.One stroke of a piston
D.All of the above

你可能感興趣的試題

單項(xiàng)選擇題

An advantage of aluminum pistons, when compared to cast iron pistons is （）.

A.greater high temperature strength
B.better heat conductivity
C.greater weight per cubic inch
D.increased resistance to wear

單項(xiàng)選擇題

Which of the combustion parameters listed is used in a diesel engine, but NOT related to the injection system?（）

A.Atomization
B.Metering
C.Effective stroke
D.Penetration