全冠戴用后又出现食物嵌塞可能的原因是 ()
A.接触点恢复不良
B.冠轴面外形不良
C.牙合面形态不良
D.对颌有充填式牙尖
E.全冠材料质量差
参考答案:A, B, C, D
枕骨大孔疝的典型表现为()。
A.颈项强直
B.呼吸骤停
C.意识与瞳孔变化晚
D.双瞳不等大
E.意识与瞳孔变化早
– Mum, do you mind my listening to music for a while?
– . But please listen to it with your earphone.
A.Yes, please
B.No, thank you
C.Not at all
D.Yes, I do