A.250Hz,500Hz,1000Hz,2000Hz,3000Hz,4000HzB.500Hz,1000Hz,2000Hz,3000Hz,4000Hz,250HzC.1000Hz,2000Hz,4000Hz,1000Hz,500Hz,250HzD.1000Hz,2000Hz,3000Hz,1000Hz,500Hz,250Hz
A.气导B.骨导C.UCLD.MCL
A.充血B.色泽改变C.鼓膜内陷D.鼓膜穿孔E.分泌性中耳炎