小松同学用“双氧水”(过氧化氢溶液)清洗伤口时,不小心将过氧化氢溶液滴到水泥地板上,发现有大量气泡产生。当时,小松并没有在意,但帮助他的同学小华问另一位同学小芳:“为什么会有气泡放出呢?是什么气体?” When Komatsu used hydrogen peroxide (hydrogen peroxide solution) to clean the wound, he accidentally dropped the hydrogen peroxide solution onto the concrete floor and found that a large number of bubbles were generated. At that time, Komatsu didn’t care, but helped his classmate Xiaohua ask another student Xiaofang: “Why is there a gas bubble? What kind of gas is it?”