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【单选题】
患者,女, 53 岁,渐进性听力下降伴耳鸣 1 年,不伴耳痛,无中耳炎病史。查体双侧外耳道干燥通畅,鼓膜完整光锥可见。纯音测听结果示左耳平均听阈 16 dB ,右耳自 4000 Hz 开始高频下降,高频平均听阈 50 dB 。该患者可能发生的听力障碍属于
A.
左侧传音性耳聋
B.
右侧传音性耳聋
C.
左侧感音性耳聋
D.
右侧感音性耳聋
E.
双侧感音性耳聋
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