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fen chen bao zha shi yan de gai jin
Author(s): 
Pages: 13
Year: Issue:  4
Journal: Education in Chemistry

Abstract:  1 教材中实验的缺点与不足粉尘爆炸实验是人教版课程标准实验教科书九年级化学第七单元课题1实验7-3.按照课本实验操作存在的缺点和不足:成功率低,按教材说明内容很难成功完成实验;不便于观察,实验过程中看不到燃烧现象;操作不方便,操作要求快捷迅速,难以把握.
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