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="05o58"><strong id="05o58"></strong></pre>

單項(xiàng)選擇題

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

A.charging
B.super charging
C.scavenging
D.exhausting

你可能感興趣的試題

單項(xiàng)選擇題

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.

A.the suction stroke
B.the compression stroke
C.the expansion stroke
D.the exhaust stroke

單項(xiàng)選擇題

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.

A.up；opened
B.down；open
C.up；closed
D.down；closed