上颌第一磨牙面特征有（）

A.近中舌尖最小

B.远中舌尖是上颌磨牙的功能尖

C.存在斜嵴

D.远中窝大于近中窝

E.牙冠呈扁圆形

The ______ look on her face indicates that the film on show must be ______; otherwise, she would not look so pale.[ ]

A. terrified; frightened

B. terrifying; frightened  

C. terrified; frightening

D. terrifying; frightening