发生于年轻恒牙的可复性牙髓炎，去净腐质未露髓者，首选治疗方法为（）
A.局麻下安抚引流
B.安抚治疗
C.间接盖髓
D.活髓切断
E.局麻拔髓
参考答案：C
--- Is Bob still working in your school?
--- I’m afraid not. He is said and in a private school recently.
A．to resign; to teach
B．to have resigned; to teach
C．to resign; to be teaching
D．to have resigned; to be teaching
在CAD中部分命令都有起缩写，即为其热键，下列命令中热键为B的是（）
A．Block（写块）
B．Bhatch（填充）
C．Break（打断）
D．Box（长方体）
