（）analysis emphasizes the drawing of pictorial system models to document and validate both existing and/or proposed systems. Ultimately, the system models become the（）for designing and constructing an improved system.（）is such a technique. The emphasis in this technique is process-centereD. Systems analysts draw a series of process models called（）.（）is another such technique that integrates data and process concerns into constructs called objects.

Ultimately, the system models become the （） for designing and constructing an improved system.

A．image

B．picture

C．layout

D．blueprint

假如1个西瓜里面有45粒种子，那么形成这个西瓜果实时所需的子房、胚珠、花粉粒、精子的数目分别是（　　）

A．1、45、90、90

B．1、45、45、90

C．2、90、90、90

D．1、45、45、45