正确答案: C

be scavenged

题目：It is very necessary that each cylinder （） before the charged air is compressed.

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学习资料的答案和解析：

[单选题]当液压拉伸器的用油变质时，应采用（）清洗液压拉伸器的油腔。

D．纯净透平油

[单选题]水润滑式艉轴工作轴颈包覆（），非工作轴颈包覆（）。

铜套/玻璃钢

[单选题]带有普通键槽的单螺旋桨轴或艉轴其检验间隔期为（）。

3年

[单选题]螺旋桨0.4R以内的缺陷（）修理。

一般不可焊补

[单选题]铁梨木舵承发生（）时应更换。

过度磨损

[单选题]（） in what position the engine stops there will always be at least one of the cylinders with its starting air valve open to admit compressed air to start the engine.

No matter

[单选题]The design of the connecting rod large end bearing is similar to that of the mainbearings Whats the meaning of "that" in the sentence above?（）

the desig

[单选题]The most important factor that causes the wear of the engine parts is （）.

friction

[单选题]The total starting air capacity required for reversible main engines is to be sufficient for at least （）.

twelve consecutive start