问题 问答题 简答题

高炉生产对炮泥的要求?

答案

参考答案:

(1)炮泥有良好的塑性,能顺利地从泥炮中推入铁口。

(2)具有快干和速硬性能,能在较短的时间内硬化,且具有较高强度。

(3)这决定着两次出铁的最短时间和堵口后允许的退炮时间。

(4)开口性能好,无渗铁或钻不动现象。

(5)体积稳定性能好且具有一定的气孔率,保证堵口后铁口通道孔径不应扩大,保证铁流稳定。

(6)对环境不产生污染。为炉前工作创造良好的工作环境。

阅读理解

Once upon a time a man became a great archer(射手).He asked the king to declare him as the greatest archer of the country. The king was about to do so when an old servant of the king said,“Wait,sir.I know an old man who lives in the forest. He is a much greater archer. Let this young man go to him and learn from him for at least three years.”

The man could not believe that there could be a greater archer than him,but he went and found the old man and he was! For three years he learned from him.Then one day,when he thought he had learned everything,the thought arose in him:“If I kill this old man,then I will be the greatest archer.”

The old man had gone to cut wood and he was coming back carrying wood on his shoulder. The young man hid behind a tree,waiting to kill him. He shot an arrow(箭). The old man took a small piece of wood and threw it.It struck the arrow and the arrow turned back and wounded the young man.The old man came,took out the arrow and said.“I knew that some day or other you were going to do this. That’s why I have not taught you this secret. There is no need to kill me. My master is still alive,and I’m nothing before him. You must be with him for at least thirty years. And he is very old,So go fast! Find the old man!”

小题1:The underlined word in the 1st paragraph is closest in meaning to “_______________ ”.

A.崇拜

B.建议

C.宣布

D.夸奖小题2:The young archer wanted to kill the old man because____________.

A.he had nothing more to learn from him

B.he could then become the greatest archer

C.the old man refused to teach him everything

D.the king’s old servant ordered him to do so小题3:What do you think would most probably happen next?

A.The young archer died from the wound soon after.

B.The king declared the young man the greatest archer.

C.The young archer found the old man’s master and killed him.

D.The young archer set off to look for the old man’s master.小题4:What lesson can you learn from the story?

A.There’s always someone better than you in this world.

B.You must never try to become better than your teacher.

C.The older a man is,the better archer he usually becomes.

D.Always use a piece of wood to protect yourself from an arrow.

单项选择题