关于_DTH介导的细胞免疫错误的是（）

A.主要是巨噬细胞和T细胞参与

B.局部可出现组织损伤

C.以单个核细胞浸润为主的炎症

D.伴有免疫复合物的沉积

E.炎症反应出现较迟

(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．Prototyping

B．Accelerated

C．Model-driven

D．Iterative