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.

（）is a classical set of techniques used to collect information about system problems

A．Continuous process improvement

B．Joint requirements planning

C．Fact-finding

D．Structured engineering

矿井安全监控系统最大巡检周期应不大于（），并应满足监控要求。

A．2s

B．10s

C．15s

D．30s