全冠邻面牙体预备应达到()。
A.消除患牙邻面的倒凹
B.与邻牙完全分离
C.形成协调的戴入道
D.预备出全冠修复材料所需要的邻面间隙
E.以上说法全都正确
参考答案:E
— Where's the ball?
— [ ]
A. He's over there.
B. It's under the bed.
C. It near the bed.
急性痘疮样苔藓状糠疹的皮损特点不是()
A.皮疹为多形性
B.有丘疹
C.脓疱疹
D.坏死
E.结痂鳞屑