在演示声音是由物体的振动�生的实验中将正在�声的音叉紧靠悬线下的泡沫�料球球被多次弹开.在此实验中泡沫�料球的作用是 A.使音叉的振动 Template




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tomski在演示声音是由物体的振动�生的实验中将正在�声的音叉紧靠悬线下的泡沫�料球球被多次弹开.在此实验中泡沫�料球的作用是 a.使音叉的振动 coloring