百度文库https://wenku.baidu.com/view/e44612b65a0102020740be1e650加成反应是放热吸热_百度文库加成反应是放热吸热 Chemical reactions can be classified into two main types: exothermic reactions and endothermic reactions. Exothermic reactions release heat into the surroundings, 更多内容请查看https://wenku.baidu.com/view/e44612b65a0102020740be1e650e52ea5418ce48.html