根据牙槽骨骨吸收理论,全口义齿制作一般在拔牙后()
A.1周
B.2周
C.4周
D.8周
E.12周
参考答案:E
The children were not ________ for the accident.
A.blamed
B.to be blamed
C.being blamed
D.to blame
“4Vs”的基本要素是什么?