咽鼓管的生理功能有误的是（）
A.压力平衡
B.引流作用
C.防声作用
D.传声增压作用
E.防止逆行感染
参考答案：D
-1-（-3）= 。
At first the company refused to purchase the equipment, but this decision was ______ revised.
A．subsequently
B．successively
C．predominantly
D．preliminarily
