1.化学实验操作之一是“高锰酸钾制取氧气 .现�录某同学的实验过程如下�选择适当仪器组装成如图所示的实验装置�检查装置气密性装置气密性 Template




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tomski1.化学实验操作之一是“高锰酸钾制取氧气 .现�录某同学的实验过程如下�选择适当仪器组装成如图所示的实验装置�检查装置气密性装置气密性 coloring