A schedule is commonly used in project planning and project portfolio management.（）on a schedule may be closely related to thework breakdown structure (WBS) terminal elements, the statement of work, or a contract data requirements list.

A.Essences

B.Elements

C.Purposes

D.Issues

正常男性血细胞比容为（）。

A.15％

B.0.15％

C.10

D.0.48

E.0.42