He was so helpful that we ____ him as direct.[ ]
A. chose
B. found
C. elected
D. put
答案:C
安氏Ⅱ类2分类错的治疗首先要()
A.打开咬合
B.排齐牙列
C.改正切牙长轴
D.改正磨牙关系
E.以上都不是
简述信息采编服务对象。