下列哪一种情况必须拔牙?()
A.牙齿大面积龋坏
B.牙列拥挤在牙弓外
C.智齿
D.牙冠部分缺损
E.牙周炎、牙齿Ⅲ度松动
参考答案:E
9.5+3.2+______=209.9-______-3.7=2.8.
These samples are not () the specifications you prescribed.
A. up to
B. into
C. according to
D. instead of