在管道上设计的（）处管道，一成为管道阴极保护中的保护死角。
A.法兰
B.绝缘接头
C.测试柱
D.固定墩
参考答案：A
饼干成型的方法分为（）、（）及（）等类型。
(31) analysis emphasizes the drawing of pictorial system models to document and validate both existing and/or proposed systems. Ultimately, the system models become the (32) for designing and constructing an improved system. (33) is such a technique. The emphasis in this technique is process-centered. Systems analysts draw a series of process models called (34) . (35) is another such technique that integrates data and process concerns into constructs called objects.
A．PERT
B．DFD
C．ERD
D．UML
