某同学做“证明鸡蛋壳的主要成分是碳酸盐并收集纯净的气体 的实验.设计了如下方案进行实验1描述a中�生的现象鸡蛋壳浮在液面上表面有 Template




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tomski某同学做“证明鸡蛋壳的主要成分是碳酸盐并收集纯净的气体 的实验.设计了如下方案进行实验1描述a中�生的现象鸡蛋壳浮在液面上表面有 coloring