摘要
初中化学教材中“空气中氧气含量测定”实验,按教材方法操作、效果甚差。改进 后的实验具有操作简便、现象明显、耗时少和验证性强等优点。
The way to test oxygen content in the air, which is introduced in Junior Textbooks,doesn't work well.The better one is characterized for its simple operation, time - saving and good result.
出处
《保山师专学报》
2003年第5期83-84,共2页
Journal of Baoshan Teachers' College
关键词
演示实验
改进
效果
demonstrative test
better
result
