题目内容

它经常出故障。

A. Because it was foreign-made.
Because it was good.
C. It has run for 1,000 hours.
D. It was often out of order.

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运转良好

A. In good order.
B. Often fails.
C. Out of order.发生故障
D. Just so so.

在高温高压下

At high temperature and low pressure.
B. At low temperature and high pressure.
C. At low temperature and low pressure.
D. At high temperature and pressure.

火管锅炉

A. Water-tube boiler.
B. Fire-tube boiler.
C. Exhaust boiler.
D. Composite boiler.

锅炉

A. Boilers.
B. Water-tube boiler.
C. Fire-tube boiler.
D. Steam.

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