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问题 多项选择题

《中华人民共和国安全生产法》第十七条规定了生产经营单位的主要负责人对本单位安全生产工作负有六方面的责任，下列属于这六方面责任的有______

A．建立、健全本单位安全生产责任制
B．组织制定并实施本单位的生产安全事故应急救援预案
C．组织完成本单位的安全评价
D．及时、如实报告安全生产事故

答案

参考答案：A,B,D

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 story happened in a ______.

A．school


B．toy store
C．cinema



D．computer room
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问答题 案例分析题

一单相电焊机铭牌数据如下：Pn=14kW，εn=50％，Un=380V，cosα=0．6，Kx取0．35。求电焊机的Pjs及Ijs。
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