來源:
https://www.ingenuity-china.com/service/%E5%A6%82%E4%BD%95%E6%B5%8B%E9%87%8F%E6%A8%AA%E6%B3%A2%E6%96%9C%E6%8E%A2%E5%A4%B4%E5%9C%A8%E9%92%A2%E4%B8%AD%E5%89%A9%E4%BD%99%E8%BF%91%E5%9C%BA%E5%8C%BA%E9%95%BF%E5%BA%A6
25.有關超音波的敘述,下列何者正確? (A)超音波換能器口徑(transdu..-阿摩線上測驗