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

單項(xiàng)選擇題

At the top of the A-frames there is a strong cast iron frame called （）.

A.cylinder liner
B.cylinder cover
C.the gear box
D.the scavenging box

你可能感興趣的試題

單項(xiàng)選擇題

At least （） cylinders in four-stroke engine will be configured to ensure that the engine can be started with the crankshaft at whatever position.

A.6
B.2
C.12
D.8

單項(xiàng)選擇題

As the plunger moves up, the ports are closed and the fuel （） and delivered to the injector nozzle at very high pressure.

A.being compressed
B.to be pumped up
C.is pressurized
D.are built up

<sup id="7ghm0"><legend id="7ghm0"><s id="7ghm0"></s></legend></sup>

<ruby id="7ghm0"><xmp id="7ghm0"></xmp></ruby>

<ruby id="7ghm0"></ruby>