问题 问答题 简答题

空压机的调试方法?

答案

参考答案:

(1)启动前检查设备及系统各部位均正常;

(2)空压机启动前要把出口阀全部打开;

(3)试启动空压机2~3秒钟,确定转向正确;

(4)测量空压机的转速、电流、进出口压力;

(5)定期检查轴承温度振动及密封;

(6)空压机应运转平稳,无异常噪音。若发现异常情况应立即停止试运行,处理正常后方可继续调试。

单项选择题
单项选择题

When I was looking for a Christmas present for my daughter in a toy store, a nicely dressed little girl, with some money in her little hand, was looking at some beautiful dolls. When she saw a doll she liked, she would ask her father if she had enough money. He usually said yes.
At the same time, a boy, with old and small clothes, was looking at some video games. He, too, had money in his hand, but it looked no more than five dollars. Each time he picked up one of the video games and looked at his father, he shook his head.
The little girl had chosen her doll, a very beautiful one. However, she noticed the boy and his father. She saw the boy give up a video game with disappointment and walk to another corner of the store.
The little girl put her doll back to the shelf and ran over to the video game. After she talked to her father, she paid for the video game and whispered(耳语) to the shop assistant.
So the boy got the video game that he wanted for free—he was told it was a prize from the store. He smiled happily, although he felt it was so incredible. The girl saw all this happen. She smiled, too.
When I walked out of the store to my car, I heard the father ask his daughter why she had done that. I would never forget their short talk. " Daddy, didn’t Grandma want me to buy something that would make me happy"
He said, "Of course, she did. "
"Well, I just did!" With that, the little girl started skipping towards their car happily.

The underlined word "incredible" most probably means "______" in Chinese.

A.难以置信的
B.令人兴奋的
C.感到绝望的
D.荒谬可笑的