A .20Hz
B .100Hz
C .1000Hz
D .20000Hz
[单选题]一般来说,人耳能够听到的声波频率范围下限是()。A .20HzB .100HzC .1000HzD .20000Hz
[填空题] 人耳能够听到的声波频率范围约在()。
[单选题]人耳可以听到的声波频率范围是( )。A.5~16HzB.16Hz~20kHzC.1~10kHzD.1~20kHzE.10~22kHz
[单选题]人耳可以听到的声波频率范围是( )。A.5~16HzB.16Hz~20kHzC.1~10KHzD.1~20kHzE.10~22kHz
[填空题] 人耳能听到的声波频率范围约在()。
[单选题]通常人耳可听到的声波的频率范围是( )。A.20~200HzB.20~2000HzC.20~20000HzD.20~200000Hz
[单选题]通常人耳可听到的声波的频率范围是( )。A.20~200HzB.20~2000HzC.20~20000HzD.20~200000Hz
[单选题]通常人耳可听到的声波的频率范围是( )。A.20~200HzB.20~2000HzC.20~20000HzD.20~200000Hz
[单选题]通常人耳可听到的声波的频率范围是( )。A.20~200HzB.20~2000HzC.20~20000HzD.20~200000Hz
[单选题]通常人耳可听到的声波的频率范围是( )。A.20~200HzB.20~2000HzC.20~20000HzD.20~200000Hz