主要由设备的无形磨损所决定的是( )。
A．自然寿命 B．物质寿命C．经济寿命 D．技术寿命
参考答案：D
可摘局部义齿中，人工后牙纵折的主要原因是（）
A.塑料基托与人工牙胶接不良
B.弯制过程中在同一过程反复修改
C.前牙覆过深，咬合过紧
D.龈距离过低
E.铸件内部有缺陷
— Iheard that there were a lot of shouts and screams at yesterday'sparty. It must have been terrible.
— Oh, no. ____, I enjoyed every minute. [ ]
A. In the end
B. As a result
C. On the other hand
D. On the contrary
过深，咬合过紧