原題:
[婦產(chǎn)科學(xué)]噪聲所致永久性聽(tīng)閾移位的早期改變特點(diǎn)是
噪聲所致永久性聽(tīng)閾移位的早期改變特點(diǎn)是
A.語(yǔ)音頻段和高頻段聽(tīng)閾同時(shí)上移
B.語(yǔ)音頻段和高頻段聽(tīng)閾同時(shí)下移
C.語(yǔ)音頻段聽(tīng)閾無(wú)明顯改變,而高頻段聽(tīng)閾下移
D.語(yǔ)音頻段聽(tīng)閾無(wú)明顯改變,而高頻段聽(tīng)閾上移
E.語(yǔ)音頻段聽(tīng)閾上移,而高頻段基本正常
答案:
C