在碗底放一枚硬币把碗移到眼睛刚好看不到硬币的地方保持眼睛和碗的位置不变请一位同学�碗里加水将观察到硬币硬币产生这种现象的原因是光的 Template




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tomski在碗底放一枚硬币把碗移到眼睛刚好看不到硬币的地方保持眼睛和碗的位置不变请一位同学�碗里加水将观察到硬币硬币产生这种现象的原因是光的 coloring