题目内容

电焊机

A welding machine.
B. A drilling machine.
C. A grinding machine.
D. A cutting machine.

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A welding machine.
B. A drilling machine.
C. A grinding machine.
D. A cutting machine.

A. It is leaking.
B. It is broken.
C. It is filled with oil.
D. It is filled with sludge.油渣

A. Weld it up.
B. Grind it.
C. Disassemble and clean it.
D. Send it to the shipyard.

A. He works as the chief engineer.
B. He may be the 2nd engineer.
C. He is a motorman.
D. He will be the fourth engineer.