患者闭眼用单手触摸熟悉的物体，如钢笔、钥匙、硬币等，并说出物体的名称是（）

A.皮肤定位觉

B.两点辨别觉

C.实体觉

D.体表图形觉

E.复合感觉

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 project

B．scheduling the start of tasks

C．scheduling the end of tasks

D．determining potential delays