______【C1】analysis emphasizes the drawing of pictorial system models to document and validate both existing and／or proposed syst

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问题 ______【C1】analysis emphasizes the drawing of pictorial system models to document and validate both existing and／or proposed systems．Ultimately，the system models become the______【C2】for designing and constructing an improved system．______【C3】is such a technique．The emphasis in this technique is process-centered．Systems analysts draw a series of process models called______【C4】．______【C5】is another such technique that integrates data and process concerns into constructs called objects．
【C4】

选项 A、PERT
B、DFD
C、ERD
D、UML

答案B

解析

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