题目内容

打开排气阀

A. Open the drain cock.
B. Fill it with water.
C. Open the scavenging box.
D. Open the cylinder.

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在通风口的出口。

At the outlet to the vent.
B. In the exhaust valve chamber.
C. At the bend.
D. At the end of the pipe.

他们必须全面检查电路

A. They’ve to clean the boiler.
B. They’ve to make the electric circuits.
C. They’ve to replace the boiler.
D. They’ve to make an overall check of the electric circuits..

工作正常

A. It is all right.
B. It works normally.
C. The insulation resistance of No.3 generator is too low.
D. It doesn’t work.

他们更换了一个缸套。

A. They cleaned all cooling jacket.
B. They replaced one cylinder liner.
C. They renewed all cylinder.
D. They checked one cylinder liner.

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