如图所示在鼓面上放一些纸�用力击鼓面下面的观察或实验正确的是 A.敲击鼓面会看到纸�在跳动b.鼓声的大小与振动得快慢有关c.此实验 Template




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tomski如图所示在鼓面上放一些纸�用力击鼓面下面的观察或实验正确的是 a.敲击鼓面会看到纸�在跳动b.鼓声的大小与振动得快慢有关c.此实验 coloring