—What does your father do?

—He is ________ English teacher at _________ university.

A．an; a

B．an; an

C．a; an

D．a; a

先天性肩胛骨高位症，正确的摄片体位是()

A．双侧腕关节正位

B．双侧踝关节正位

C．双侧肩关节正位

D．双侧肩胛骨正位

E．双肩锁关节正位