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问题 单项选择题

若交互作用全可忽略，应选择正交表

A．L4(23)

B．i8(27)

C．L9(34)

D．L27(213)

E．L12(211)

答案

参考答案：C

改错题
短文改错。以下标有题号的每一行均有一个错误，请找出，并按下列情况改正：
此行多一词：把多余的词用斜线（＼）划掉，在该行右边横线上写出该词，并也用斜线划掉。
此行缺一词：在缺词处加一个漏字符号（^），在该行右边横线上写出该加的词。
此行错一词：在错词的下面划一横线，在该行右边横线上写出改正后的词。
     Here is my idea about how a friend is like. Firstly,          
a friend is someone you can share your secrets. If you        
tell him a secret, never will he talks about it with anybody 
else. Besides, a friend is always good listener when you     
need one. After hear your sad stories, he will say some       
words that is nice and warm. Still, your happiness makes     
him happily too. What’s more, a good friend is willing to   
offer the help to which you need, or can at least give you   
some advices. In a word, friends are those you like and       
trust, and you will enjoy every minute that you spent with   
them.                                                          		1.______      
2.______      
3.______      
4.______       
5.______      
6.______              
7.______   
8.______      
9.______      
10.______   
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填空题

火力发电厂生产过程的三大设备是（）、（）和（）。
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