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《向澄清的石灰水中吹气》实验是九年义务教育三年制初中生物第二册第六章第二节的内容。其目的要求是：验证人体呼出的气体中，含有较多的二氧化碳。其实验装置如图１所示。从实验装置和实验结果显然可知，本实验只能检验呼出气体中含有较多的二氧化碳，不能检验吸入的气体中
The experiment of “blowing into clarified lime water” is the content of the second year of the nine-year compulsory education three-year junior high school biology second volume sixth chapter. Its purpose is to verify that the body exhaled gas contains more carbon dioxide. The experimental device is shown in Figure 1. From the experimental setup and experimental results, it is clear that this experiment can only detect the exhaled gas containing more carbon dioxide, and can not test the inhaled gas