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Improvement on the Experiment of " Determining Oxygen Content in the Air"

Li Deqian Huaiyuan Campus Middle School, Huaiyuan, Anhui Province, China 233400  
The writer analyzes the deficiency in the middle school chemical textbook,concerning the experiment of "mensurating oxygen contents in the air",and advances several betterments,which not only updates the precisinon but visual and has little pollution.
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