A.乳突小管開口
B.鼓室小管下口
C.蝸水管外口
D.前庭小管外口
E.弓形下窩

A.巖淺大神經(jīng)溝、巖淺小神經(jīng)溝、三叉神經(jīng)壓跡
B.巖淺小神經(jīng)溝、巖淺大神經(jīng)溝、三叉神經(jīng)壓跡
C.三叉神經(jīng)壓跡、巖淺大神經(jīng)溝、巖淺小神經(jīng)溝
D.三叉神經(jīng)壓跡、巖淺小神經(jīng)溝、巖淺大神經(jīng)溝
E.巖淺小神經(jīng)溝、三叉神經(jīng)壓跡、巖淺大神經(jīng)溝