Accelerated analysis approaches emphasize the construction of （） to more rapidly identify business and user requirements for a new system. As an accelerated analysis technology,（） reads the program code and automatically generates the equivalent system model, and the code can be obtained from （） . All system analysis approaches require some form of （） which includes those techniques to be used to identify or extract system problems and solution requirements from user community. （） is a classical set of techniques used to collect information about system problems, opportunities, solution requirements, and priorities.

Accelerated analysis approaches emphasize the construction of （） to more rapidly identify business and user requirements for a new system

A．object models

B．prototypes

C．use cases

D．components

指示标志的作用是什么？

A．限制车辆、行人通行

B．指示车辆、行人行进

C．告知方向信息

D．警告前方危险