(08年台州市期末)发生多普勒效应是因为  A.波源的频率发生了变

08年台州市期末)发生多普勒效应是因为

 A.波源的频率发生了变化              B.波源的振幅发生了变化

 C.观察者接收的频率发生了变化        D.观察者接收的振幅发生了变化

答案

C

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