单项选择题决策按所处的环境可分为（）。 A 确定型决策、风险型决策和不确定型决策 B 具体型决策和指导型化决策 C 战略性决策、战术性决策和业务决策 D 程序化决策和非程序化决策
单项选择题The optional activities should be prepared by the teacher as backups in case the lesson goes too fast and there are a few minutes left. A、正确 B、错误
