根据命题条件和结论中涉及知识点的多少不同 ,我们将包含化学反应的题目分为单一型和复合型两种类型。1 单一型　是指题目条件和结论中只涉及到一个知识点 ,解题过程只要独立地考虑某一种生理过程 ,运用某一知识点的知识就能解答问题。解题基本步骤是 :首先 ,根据题目条件和结 According to how different the propositional conditions and conclusions involve knowledge points, we divide the topics containing chemical reactions into two types: single type and complex type. 1 The single type refers to only one knowledge point involved in the topic condition and conclusion. The problem solving process only needs to consider a certain physiological process independently and use knowledge of a certain knowledge point to solve the problem. The basic steps for problem solving are: First, according to the conditions and knots