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问题 单项选择题 A1/A2型题

单侧垫活动矫治器的适应症是（）

A.单侧后牙正、反锁或反

B.前牙反

C.牙列拥挤

D.安氏Ⅱ类错

E.深覆、深覆盖

答案

参考答案：A

选择题
Your T-shirt is so cool. Could you tell me ______?  
[ ]
A. where you buy it
B. where do you buy it
C. where you bought it
D. where did you buy it
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问答题 简答题

什么叫放样的允许误差？
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