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

單項選擇題

If the engine does not start on air, it may be due to （）

A.low compression of the fuel pumps
B.incorrect timing of fuel pumps
C.the starting air valves stuck
D.air-locks in fuel oil pipeline

你可能感興趣的試題

單項選擇題

If the engine （） for a long period, there will be a danger of frost.

A.must to stand inoperative
B.has to stand inoperative
C.must be stood idle
D.will stand idle

單項選擇題

If the atomizer holes are enlarged beyond the makers recommended size, the atomizer must be （）.

A.repaired
B.replaced
C.replenished
D.repeated

<pre id="0bvfd"><legend id="0bvfd"></legend></pre>

<sup id="0bvfd"><legend id="0bvfd"><div id="0bvfd"></div></legend></sup>