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="ekgtx"><acronym id="ekgtx"></acronym></pre>

單項(xiàng)選擇題

The fuel injection system is very important, so any trouble of it will （） the operation of the main engine.

A.be affected
B.affect
C.be effected
D.effect

你可能感興趣的試題

單項(xiàng)選擇題

If you don’t understand the meaning of the technical terms of the diesel engine, you can （） the dictionary of machine technology.

A.look for
B.find out
C.consult
D.read

單項(xiàng)選擇題

The fuel oil pressure and forced draught pressure should be matched to ensure good combustion with a full steady flameIn the sentence the word “match” means （）

A.join with
B.mix
C.be equal to
D.be constant