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

<sup id="kk9wd"><pre id="kk9wd"><div id="kk9wd"></div></pre></sup>

<ruby id="kk9wd"><small id="kk9wd"></small></ruby>

單項選擇題

The （） can tell us how much heat we can get from the burning of an oil.

A.viscosity
B.flash point
C.cetane number
D.calorific value

你可能感興趣的試題

單項選擇題

（） into the cylinder because no fuel can burn （） it.

A.Air must be admitted；without
B.Oil must be injected；without
C.Air must be admitted；with
D.Oil must be injected；with

單項選擇題

When the fuel oil is burning in the combustion chamber, it （）.

A.gives up large amount of heat
B.gives off large amount of heat
C.gives up large amount of steam
D.gives off large amount of steam

<ruby id="vf2ke"><output id="vf2ke"></output></ruby>

<ruby id="vf2ke"><xmp id="vf2ke"></xmp></ruby>