一、定义复分解反应是指两种化合物相互交换成分，生成另外两种化合物的反应。它是四大基本反应之一。二、基本模式AB＋CD＝AD＋CB三、判断依据1‘反应物、生成物种类都且只能是两种。｝反应物、生成物都是化合物，没有单质。3反应中，反应物相互交换成分，组成新物质。四、实 First, the definition of metathesis reaction refers to the reaction of two compounds exchanged with each other to generate two other compounds. It is one of the four basic reactions. Second, the basic model AB + CD = AD + CB Third, the basis for the judgment 1 ‘reactants, product types and can only be two kinds. } Reactants, products are all compounds, there is no simple substance. In the reaction, the reactants exchange components and form new substances. Four, real