(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.

A．Structured analysis
B．Information Engineering
C．Discovery Prototyping
D．Object-Oriented analysis

1949年2月初，毛 * * 在同苏联领导人米高扬谈话时说：“我们这个国家，如果形象地把它比作一个家庭来讲；它的屋内太脏了……解放后，我们必须认真清理我们的屋子……等屋内打扫清洁、干净，有了秩序，陈设好了，再请客人进来。”对这段话正确的理解是[ ]

A．不承认国民政府建立的一切旧的屈辱的外交关系

B．团结世界各国人民，巩固和发展和平力量

C．清除帝国主义在华残余势力，为建立平等的外交关系奠定基础

D．中国政府在外交上坚定地站在社会主义阵营一边