谁知道有关超声波、次声波的知识?
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/10 19:47:00
![谁知道有关超声波、次声波的知识?](/uploads/image/z/4937679-63-9.jpg?t=%E8%B0%81%E7%9F%A5%E9%81%93%E6%9C%89%E5%85%B3%E8%B6%85%E5%A3%B0%E6%B3%A2%E3%80%81%E6%AC%A1%E5%A3%B0%E6%B3%A2%E7%9A%84%E7%9F%A5%E8%AF%86%3F)
xVrW-*b9Bl*+yՈABB$ABH_oXr7Mª;{i>~W2t (J}6mcM?b6r۟oχ+d&mvVG=۬(9kg}$.@َgFm)b.%e-i*;27mmm,q>v']wf3Qb
&dxA1m=ͻΧ/">f3kQwZE^I M2,"Y1P:d!,Dw*NAQKO&MՍeU'~dx+cy{Ex75TP;&RX?/ja+) 00g/hafɚ~jw{,Td#,QuG[_q;g&B戙'*Wz,yFY,{Btxx&