利用钢尺可以做“探究声音的特性 的实验1如图所示用一只手将钢尺压在桌沿上另一只手轻轻拨钢尺一端听其响度再用力拨动钢尺这时钢尺的 Template




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tomski利用钢尺可以做“探究声音的特性 的实验1如图所示用一只手将钢尺压在桌沿上另一只手轻轻拨钢尺一端听其响度再用力拨动钢尺这时钢尺的 coloring