咽鼓管的生理功能不包括（）
A.保持中耳内外气压平衡
B.引流中耳的分泌物
C.防止逆行性感染
D.消声作用
E.使声音增压作用
参考答案：E
Which of the following is true about him().
A. He always makes mistakes.
B. He is forty.
C. He likes numbers about everything.
D. He is overcritical.
