问题 问答题 简答题

冲压模具工作零件材料的要求是什么?

答案

参考答案:

(1)良好的耐磨性。

(2)良好的热处理工艺性能。

(3)一定的冲击韧性。

(4)良好的抗黏结性。

另外,冲模一般零件选用的材料应具有一定的力学性能、机械加工性能。

阅读理解

阅读理解。

     One man was reading a newspaper on the deck of a ship.Suddenly it blew strongly, the man's hat

was blown into the sea. He touched his head with his hand and went on reading his newspaper.

     There was a person beside him who was surprised and told him: "Sir. Your hat was blown into the

sea. "  "I see. Thanks. " He said and then read the newspaper again.    "But your hat is  worth a lot of

money. "  "Yes,  I am thinking of how to save money and buy another one.  I lost my hat,  I felt very

sorry. But can it come back?"

     It is true that the lost thing  sometimes  will never return.  It is better to think of ways to solve the

problem than trying to find it.

     Many people have such experience (经历) that lost something valuable (有价值的)or important.

Then they would feel very sorry and bitter.  Why? It is because they can't adjust(调整) our attitude

(态度) to such things. And only think about the things which will never return. But I think we should

think about how to get the new one instead of regretting(遗憾) only.

判断正误,对的用(A),错误的用(B)。

( )1. When we lost something important or valuable(珍贵的) , we must try to find it.

( )2.  It is better to find a way to solve the problem of losing things than to feel sorry only.

( )3. The man's hat was blown away when he was reading a book on the deck.

( )4. Many people have the experience oflosing something.

( )5. The man tried to get his hat back when it was blown into the sea.

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