(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.

（73）处填（）。

A．Structured analysis

B．Information Engineering

C．Discovery Prototyping

D．bject-Oriented analysis

在SQL Server中，触发器不具有（）类型。

A.insert触发器

B.update触发器

C.delete触发器

D.select触发器