单项选择题 以下不具有"完成-开始"关系的两个活动是（）。

单项选择题 某软件公司欲开发一个图像处理系统，在项目初期开发人员对需求并不确定的情况下，采用（）方法比较合适。

单项选择题 Many of the activities performed during the preliminary investigation are still being conducted in（1）,but in much greater depth than before. During this phase, the analyst must become fully aware of the（2）and must develop enough knowledge about the（3）and the existing systems to enable an effective solution to be proposed and implemented. Besides the（4）for process and data of current system, the deliverable from this phase also includes the（5）for the proposed system.