对嵌体洞斜面的描述哪项不恰当
A．位于牙釉质内
B．去除洞缘无基釉
C．增加密合度
D．防止粘结剂被唾液溶解
E．位于牙本质内
参考答案：E
— _ today!
— Yes. Shall we have a picnic in the open air? [ ]
A. What fine weather is
B. How fine weather it is
C. What a fine weather it is
D. How fine the weather is
使用铁锨攉煤时目光必须注视锨头位置。
