97免费在线观看视频,亚洲综合自拍网,黄色毛片免费观看,热久久综合网,免费看日产一区二区三区狠狠操av,久久久涩涩涩,在线精品免费视频,人人插天天干,久久91精品国产91久久

<pre id="9kcol"></pre>

單項(xiàng)選擇題

The selection of an oil depends （） on the operating conditions, the design of the engine and the type of fuel to be burned.

A.to a great extent
B.on a great extent
C.on mainly
D.on only

你可能感興趣的試題

單項(xiàng)選擇題

The selection of a lubricating oil depends to a great extent on the operating conditions,（）.

A.the type of coolant
B.the design of the engine
C.the type of fuel to be burned
D.B and C

單項(xiàng)選擇題

The sealing rings are in four parts and pressed together around the piston rods by means of （）.

A.nuts
B.bolts
C.coil springs
D.stuffing boxes

<pre id="qdg5p"></pre>