Who's that woman? [ ]

A. She's tall and thin.

B. She's my science teacher.

C. She's a student.

分泌性中耳炎的病因包括（）。

A.病毒感染

B.免疫反应

C.细菌感染

D.咽鼓管功能障碍

E.耳毒性药物