耳硬化症手术治疗的术式有()
A.镫骨切除术
B.外半规管开窗术
C.镫骨撼动术
D.内淋巴囊手术
E.镫骨提高术
参考答案：A, B, C, E
Would you please keep silent? The weather report and I want to listen.
A．is broadcast
B．has been broadcast
C．is being broadcast
D．was broadcast
青藏地区界线的确定，主导因素是
A．气温
B．降水
C．海拔
D．纬度
