某同学用如图所示的装置在实验室加热高锰酸钾制取氧气回答问题1请指出图中明显存在的错误并纠正�试管口�上倾斜试管口应略�下倾斜.� Template




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tomski某同学用如图所示的装置在实验室加热高锰酸钾制取氧气回答问题1请指出图中明显存在的错误并纠正�试管口�上倾斜试管口应略�下倾斜.� coloring