A．①②B．①③④C．②③④D．①②③④Maintenance activities include（ ）.①……

单项选择题A well-designed system should be（ ）.①easily understood②reliable③straightforward to implement④straightforward to maintain

单项选择题The process of software development doesn’t include（ ）．

单项选择题Consumption of the total life-cycle effort in software maintenance is（ ） that in software development．

单项选择题监理单位在业主开始委托监理的过程中，为承揽监理业务而编写的监理方案性文件是（ ） 。

单项选择题监理规划编制的依据为（ ） 。