人耳能听到的频率为( )。A.15~20000Hz B.15~18000Hz

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问题 人耳能听到的频率为( )。A.15~20000HzB.15~18000HzC.20~18000HzD.20~20000Hz

选项 A.15~20000Hz
B.15~18000Hz
C.20~18000Hz
D.20~20000Hz

答案 D

解析
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