题目内容

这些是阀门。

A. These are boilers.
B. They are valves.
C. There are lubricating oil pumps.
D. They are cylinder liners.

查看答案

搜索结果不匹配？点我反馈

更多问题

A. I don't know Mr. Stevenson.
B. Mr. Stevenson works for PSC.
C. Mr. Stevenson comes from PSC.
D. Mr. Stevenson is a seaman.

A. This is a switch.
B. That is a switchboard.
C. It is a boiler.
D. This is a fire switch.

A. Here is a reciprocating pump.
B. There is a rotary pump.
C. A centrifugal pump is over there.
D. There is a transfer pump.

A. This is our workshop.
B. That is his workshop.
C. It is your workshop.
D. That is our workshop.