活性氧化硅
参考答案：
具有较多内表面孔的铝胶，是一种可以再生吸附力很高的吸附剂。
Since we all agree on this plan, the next thing we are going to do is to carry it out. The underlined part means
_______. [ ]
A. complete it
B. do it
C. put it up
D. take it up
牙周病的医源性因素应除外（）
A.冠桥及银汞充填的悬突边缘
B.正畸矫治器过于伸入龈下
C.过凸的修复体外形
D.两牙邻面均有充填体
E.基牙的咬合负担过大
