第五章节特点是知识点多,内容繁杂,好学易忘,仅靠单纯的记忆难以真正掌握,因此同学们在学习过程中要紧紧把握住二氧化碳中心点,将二氧化碳知识理解透彻,并善于以二氧化碳作为中心而向其它知识点扩散,达到以不变应万变,事半功倍的效果,从而建构起本章学习体系.现将二氧化碳知识总结如下. The fifth chapter is characterized by a lot of knowledge, complicated content, easy to forget and easy to forget. It is difficult to really grasp only with simple memory. Therefore, students must grasp the CO2 center point in the learning process, understand CO2 knowledge thoroughly, and be good at Carbon dioxide as a center spreads to other knowledge points and achieves the effect of being unchangeable and efficient, thus constructing a learning system for this chapter. The knowledge of carbon dioxide is summarized as follows.