如图所示用悬挂着的乒乓球接触正在�声的音叉乒乓球会多次被弹开.这个实验是用来探究 A.声音能否在真空中传播b.声音产生的原因c.音调 Template




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tomski如图所示用悬挂着的乒乓球接触正在�声的音叉乒乓球会多次被弹开.这个实验是用来探究 a.声音能否在真空中传播b.声音产生的原因c.音调 coloring