— Is the ____________ your teacher?

— Yes, he is. [ ]

A. man

B. she

C. woman

疑有上颌骨骨折时，最常用的X线投影方式是( )

A．上颌前部片

B．华氏位片

C．许勒位片

D．颅底位片

E．X线投影测量正位片