修复体边缘强度最弱的边缘形式是（）
A.135°肩台
B.带斜面90°肩台
C.刃状边缘
D.90°肩台
E.深凹形
参考答案：C
—______year were you born?
—I was born in 1992. [ ]
A. What
B. When
C. Which
D. How many
人体的体液可有哪些构成?
A．细胞内液
B．组织间液
C．血浆
D．以上均是
