问题 问答题 简答题

感应再加热装置平面布置要注意什么?

答案

参考答案:

1)加热器线圈放置在减径机入口的辊道之间,与减径机的净间距有两种方案:净间距约2.5m(两个辊间距),这样钢管出加热器后较快地进入减径机,钢管温降小,车间布置也相对紧凑;净间距大于一个管长(或仅满足厚壁管),这样可以使钢管加热器中来回进行多次加热,因此可处理冷管或掉队管。

2)电容器必须紧靠加热器以及电源与电容器之间的距离最好不大于7.0米,以减少高频、大电流导线的线路损失。

阅读理解

阅读理解。

     I shook hands with my father in the truck, and for a long time he looked straight ahead and didn't say a

word. But I knew he was going to say a little to me. "I can't tell anything," he finally said. "I never went to

college, and none of your brothers went to college. I can't say 'don't do this and do that', because everything

is different and I don't know what is going to come up. I can't help much with money either, but I think

things will work out."

     He gave me a new check-book. "If things get pushing, write a small check. But when you write one,

send me a letter and let me know how much. There are some things we can always sell." In four years all

the checks I wrote were less than a thousand dollars. My part-time jobs such as reading to the blind student

and sitting with the teachers' kids filled in the financial gaps.

     "You know what you want to be, and they'll tell you what to take," my father went on. "When you get a

job, be sure it's honest, and work hard." I knew that soon I would be alone in the big town, and I would be

missing the cool winds and a life where your thinking was done for you.

     Then my dad reached down beside his seat and brought the old, broken Bible that he had read so often,

the one he used when he wanted to look something up in a friendly quarrel with one of the neighbours. I

knew he would miss it. I knew, though, that I must take it.

     He didn't say, "Read this every morning." He just said, "This can help you if you will let it."

     Did it help? I got through college without being a burden on the family. I have been able to make money

since.

1. What is the writer's main purpose (目的) in writing this passage?

A. To tell the readers his life story.

B. To tell people what kind of person his father was.

C. To let people know how poor he was.

D. To tell the readers what present he got from his father.

2. Why did the father not ask his son not to do this and do that?

A. Because he felt quite confident of him.

B. Because he was born from a poor family.

C. Because he was a man of few words.

D. Because he didn't want to be much too strict with him.

3. What would you learn from this passage?

A. How to live by oneself.

B. How to stand on one's own feet.

C. What a good father should do.

D. What the self-important is like.

4. What may be the proper Chinese meaning for the underlined part in the passage?

A. 闲暇时光

B. 学费

C. 经济不足

D. 精神空虚

5. What kind of book did the Bible seem to be to the writer's father?

A. It was a book which told you how you should get on well with others.

B. There were many good examples for you to copy in it.

C. It was a book that told you how to get a good job and a good future.

D. It was a good book that could help you when you were in trouble.

单项选择题