慢性化脓性中耳炎乳突手术的目的是()
A.彻底清除病变组织
B.控制感染
C.预防并发症
D.重建听力
E.力求干耳
参考答案：A, D, E
After the trainer was sure that the whale could look after itself, he _______ it into the sea.
A．transported
B．delivered
C．released
D．handled
INTR引脚上来的中断属于什么中断？
