固定义齿的固位体是（）
A.粘固于基牙上的嵌体
B.粘固于基牙上的全冠
C.粘固于基牙上的部分冠
D.基牙
E.桥体
参考答案：A, B, C
提出"治外本诸于内"的思想是
A．外吹乳痈B．内吹乳痈C．不乳儿乳痈D． * * 破裂乳痈E．席风呵乳
-- I heard a student killed his mother cruelly.
-- So did I. It has ____ a serious problem about the education system in China.
A．taken up
B．made up
C．pulled up
D．brought up
