利用一根薄钢尺和桌子请你设计下列两个小实验并简要说明实验步骤1验证声音响度的大小与�声体振动的振幅有关2探究决定音调高低的因素 Template




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tomski利用一根薄钢尺和桌子请你设计下列两个小实验并简要说明实验步骤1验证声音响度的大小与�声体振动的振幅有关2探究决定音调高低的因素 coloring