违约概率是事后检验的结果。（）
参考答案：错
解析：违约概率是事前估计的结果，所以此说法错误，选B。
护士小白在给有活动性假牙的刘奶奶做口腔护理时适宜的顺序为（）
A、先漱口再洗牙
B、先洗牙再漱口
C、需将假牙取下后再进行口腔护理
D、漱口后将假牙取下后用牙刷刷洗即可
A work breakdown structure (WBS) is a tool used to define and group a project's discrete work elements in a way that helps organize and define the total work scope of the project. A WBS is most useful for ______.
A．identifying individual tasks for a projectB．scheduling the start of tasksC．scheduling the end of tasksD．determining potential delays
