It is not exaggerating to say that everything the teacher does is either assessment or action taken as a result of certain assessment.()

当贡献毛益总额大于固定成本时，安全边际率大于0。() 点击查看答案

产品成本是产品价值中物化劳动价值和活劳动价值的货币表现。() 点击查看答案