公安人员在破案时常常依据案发现场作案人员留下的脚印推断犯人的身高，如果 用a 表示脚印长度，b 表示身高，关系近似于：b=7a-3.07

(1) 某人脚印的长度为24.5 ㎝, 则他的身高约为多少?

(2) 在某次案件中, 抓获了两名可疑人员, 一个身高为1.82m, 另一个身高为175 ㎝现场测量的脚印长度为26.3cn, 哪个可疑人员的嫌疑更大?

(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