( )是指投资决策时,从多种方案中选取最优方案而放弃次优方案所丧失的收益 ["账面成本","过去成本","机会成本","相关成本"]
下列属于按投资项目之间的从属关系分类的是 ["新设投资","维持性投资","扩大规模投资","独立投资"]
相关成本不包含 ["重置成本","未来成本","机会成本","账面成本"]
下列属于证券投资的特点的是 ["专业理财","分散风险","集合投资","参与度低"]
债券投资的优点有哪些 ["本金安全性高","收入稳定性强","市场流动性好","投资收益高"]
计算A、B公司股票的内在价值。