氧气顶吹转炉炼钢操作中，石灰的冷却效应（）于废钢。 A.大 B._爱下问搜题

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问题单项选择题

氧气顶吹转炉炼钢操作中，石灰的冷却效应（）于废钢。

A.大

B.小

C.无法比较

D.相当

答案

参考答案：D

填空题

短文填空.用方框中所给单词的适当形式填空,使短文完整正确.(每空限用一词,有两个词是多余的)

but, feel, helpful, notice, if, ran, make, instead, accept, in, refuse, receive

     When you choose a friend, you should be very careful. A good friend can help you study. You can have fun together and    l   each other happy. Sometimes you will meet such friends. They will be with you as long as you have money or luck,    2     when you are down, they will   3  _ away.  How do you know when you have found a good friend?
    Above all, a good friend should try to understand how another person is   4    _. He is not quick to judge.    5     , he tries to learn from others.  He puts himself in the other person's place, and he tries to think of
ways to be   6    . He is also a good listener.
     At the same time, however, a good friend is honest.  He does not look for faults(过错) in others. He
   7    _ their good points. In short, a friend will try to understand you and __8     you.
     One of a quality of friends is reliability. You can always depend on(信赖)  a good friend.  ___9__he tells you he will meet you somewhere at a certain time, you can be sure that he will be there. If you need a favor, he will do his best to help you. If you are   10      trouble, he will not run away from you.

判断题

模拟现场环境主要是对火场景况、气候、气氛的模拟。（）