我们生活的环境中，空气质量的优劣，直接影响到我们的健康。而人的呼吸保健做得好坏，是很重要的。那么怎样做才能使环境中的空气质量优良，怎样做才能达到呼吸保健的目的呢？下面请同学们来了解一下。大自然中空气含氧量较高，对我们的健康是十分有益的。但是，教室里的空气 In the environment of our life, the quality of air directly affects our health. And human respiratory health is good or bad, is very important. So what can be done to make the air quality in the environment good, what can we do to achieve the purpose of respiratory care? Here are some students to find out. The high oxygen content of the air in nature is very beneficial to our health. But the air in the classroom