在正常情况下制备前牙桩冠根面时应制成（）
A.唇舌两个斜面
B.唇舌向平面
C.舌唇向斜面
D.唇舌向斜面
E.以上均非
参考答案：A
看图完成句子或对话。
A: _________ the woman?
B: She's Miss Li. She's a teacher.
A: Is it time for class?
B: Yes, it is. Class _________ at 8: 30.
In history, every great culture had its own ideas of beauty ______ in art and literature.
A．expressed
B．to express
C．being expressed
D．to be expressed
