问题 单项选择题

上下牙弓狭窄其矫治原则为

A.缩小上牙弓宽度,或扩大下牙弓宽度,或二者并用
B.扩大上牙弓,或用肌能训练矫治法并加强营养及咀嚼功能,以促进颌骨及牙弓的发育
C.矫正颌间关系
D.扩大牙弓,推磨牙向后
E.升高前牙,或压低后牙

答案

参考答案:E

阅读理解

阅读下列短文,从各题A、B、C、D中选出能回答所提问题或完成所给句子的最佳答案。

     Mr. George works at the school lost and found. He works very carefully. Every day, when he gets a

  lost thing, he takes notes about it. There are pens, books, school uniforms, keys, walkmans and many

 other things in the lost and found. Most of them are the students'. If you lose your things, it's easy for you

 to go to the lost and found for help. But you must tell Mr. George what it is and its color and the day when

  you can't find it. I think Mr. George is very helpful, and you will be happy when you find the lost there.

1. Who works at the school lost and found?

    A. Mr. Brown           

    B. Mr. King

    C. Mr. George           

    D. Nobody

2. There are _____ things in the lost and found.

    A. no     

    B. few     

    C. a few

    D. many

3. Most things Mr. George takes care of are the _____.

    A. boys'     

    B. girls'

    C. students'  

    D. teachers'

4. If you lose your things, you'd better go to ask _____.

    A. Ben               

    B. Mr. George

    C. your teacher            

    D. your parents

5. If you lose your things and go to the lost and found for help, you needn't tell Mr. George _____.

    A. What it is              

    B. how much it is  

    C. its color              

    D. the day when you lost it.

单项选择题