如图所示,在演示声音是由物体振动引起的实验中,将正在�声的音叉紧靠悬线下的轻质小球,小球被多次弹开。在此实验中小球的作用是 A.使音叉 Template




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tomski如图所示,在演示声音是由物体振动引起的实验中,将正在�声的音叉紧靠悬线下的轻质小球,小球被多次弹开。在此实验中小球的作用是 a.使音叉 coloring