鼓膜切开术的适应证是（）
A.慢性卡他性中耳炎
B.渗出性中耳炎
C.急性化脓性中耳炎
D.慢性化脓性中耳炎
E.急性卡他性中耳炎
参考答案：C
26.—Were the audience allowed to join in the play?
—Yes, the actors_______to satisfy the audience were successful.
A．who it was the duty
B．of which the duty was
C．whose duty it was
D．whose was the duty
B细胞表面最重要的标志为（）
A．SmIg
B．FCYR
C．CD40
D．CD5
E．CD80
