安全生产管理的动态相关性原则表明，如果系统要素处于( )状态，则事故就会发生。

A．静止的、无关的

B．静止的、有关的

C．动态的、相关的

D．动态的、无关的

She _____an old friend of hers yesterday while she was shopping at the department store.      [ ]

A. turned down  

B. dealt with    

C. took after      

D. came across