无码高清视频|成人自拍视频|欧美成人午夜无码A片秀色直播|草美女视频网站|美女被操网站在线观看

<dd id="kueie"></dd>

<dl id="kueie"><strong id="kueie"></strong></dl>
<em id="kueie"></em>

單項選擇題

The two-stroke cycle begins with the piston coming up from the bottom of its stroke, with scavenge ports in the sides of the cylinder being （）.

A.shut
B.closing
C.opened
D.closed

你可能感興趣的試題

單項選擇題

The term medium speed diesel engine is currently taken to mean an engine with an operating rotational speed of （） rpm.

A.below 300
B.above 1200
C.between 300 to 1200
D.below 1200

單項選擇題

The term （） refers to one complete sequence of operations required to produce power in an engine.

A.diesel engine
B.stroke
C.cycle
D.compression ratio

<ruby id="pkeyi"></ruby>

<dl id="pkeyi"><strong id="pkeyi"></strong></dl>

<ruby id="pkeyi"><output id="pkeyi"></output></ruby>