(71) analysis emphasizes the drawing of pictorial system models to document and validate both existing and/or proposed systems. Ultimately, the system models become the (72) for designing and constructing an improved system. (73) is such a technique. The emphasis in this technique is process-centered. Systems analysts draw a series of process models called (74) . (75) is another such technique that integrates data and process concerns into constructs called objects.

（74）是（）

A.PERT

B.DFD

C.ERD

D.UML

《素问·气穴论》称具有"溢奇邪"、"通营卫"作用的是（）

A.皮部

B.孙络

C.浮络

D.别络

E.大络