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="txjej"><legend id="txjej"><s id="txjej"></s></legend></pre>

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

<pre id="txjej"></pre>

單項選擇題

In a complete oil/water separator, more oil will separate out onto the underside of these plates and travel outwards until it is free to rise into the oil collecting space Whats the meaning of "it" in the sentence above?（）

A.a separator
B.oil
C.water
D.an oil collecting space

你可能感興趣的試題

單項選擇題

In a commonly used fuel oil system, the oil is stored in tanks in the double bottom from which it is pumped to （） and heated.

A.a service tank
B.a settling tank
C.an expansion tank
D.a double bottom tank

單項選擇題

In a central cooling system, used in some modem ships, sea water is supplied to cool （）which will circulate to other individual cooler, greatly reducing the corrosion problems.

A.main bearings
B.sea water
C.cooling oil
D.lower temperature fresh water

<sup id="qrlwk"><legend id="qrlwk"><div id="qrlwk"></div></legend></sup>

<blockquote id="qrlwk"></blockquote>