如图,正在�声的音叉多次将悬挂的乒乓球弹开,这样做是为了 A.使音叉的振动尽快停下来 B.把音叉的微小振动放大,便于观察 C.把声音的 Template




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tomski如图,正在�声的音叉多次将悬挂的乒乓球弹开,这样做是为了 a.使音叉的振动尽快停下来 b.把音叉的微小振动放大,便于观察 coloring