共振是怎么回事？

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上高中的时候忘了

2 replies

Balthild

Apr 26, 2017 via Android

liuyanjun0826

Apr 26, 2017

@Balthild wikipedia 准确吗？比如说指哨这个条目，用舌头切割空气比用嘴唇切割空气更有力，这件事是共振吗？