3/4冠最主要的缺点是（）
A.就位困难
B.不能做固定桥固位体
C.磨牙多
D.外形线长，不利防龋
E.不美观
参考答案：D
-- Would she mind playing against her former teammates?
-- __ She is willing to play against any tough players.
A．I think so.
B．I'm not surprised.
C．Of course.
D．Not likely!
监生历事制度
