题目内容

电动机

A. Chain drive.
B. Gear drive.
C. Motor drive.
D. Either chain drive or gear drive.

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At 7-day's interval.
B. At 8-day's interval.
C. At regular interval.规律的间隔
D. Irregularly.不规则

A. Push the button of power supply .
B. Check everything .
C. Start oil pump.
D. Open the steam valve.

A. Check it carefully.
B. Change it with a new one.
C. Repair it.
D. Send it to the workshop.

A. The oil separator.
B. The oily water separator.
C. The fresh water generator.
D. The exhaust gas boiler.