A .10000Hz
B .1000,000Hz
C .1MHz
D .0.1Hz
E .20MHz
[单选题]哪一频率不在超声的频率范围()A.10000HzB.1000000HzC.1MHzD.0.1MHzE.20MHz
[单选题]哪一频率不在超声的频率范围()A.10000HzB.1000000HzC.1MHzD.0.1MHzE.20MHz
[单选题]哪一频率不在超声的频率范围A.10000HzB.1000000HzC.1MHzD.0.1MHzE.20MHz
[单选题]哪一频率不在超声的频率范围()A.10000HzB.1000000HzC.1MHzD.0.1MHzE.20MHz
[单选题]哪一频率不在超声的频率范围A.10000HzB.1000000HzC.1MHzD.0.1MHzE.20MHz
[单选题]以下哪一频率不在超声的频率范围A.20000HzB.1000000HzC.1MHzD.0.1HzE.20MHz
[单选题]超声脉冲所含的频率范围称为( )。A.传播B.带宽C.折射D.抑制E.宽频
[单选题]超声脉冲所含的频率范围称为( )。A.传播B.带宽C.折射D.抑制E.宽频
[单选题]超声脉冲所含的频率范围称为()A.传播B.带宽C.折射D.抑制E.宽频
[单选题]超声脉冲所含的频率范围称为()A.传播B.带宽C.折射D.抑制E.宽频