the children had at the seaside during their stay in the country!

A．What a fun

B．What fun

C．How funny

D．How fun

为加强电力生产现场管理，规范各类工作人员的行为，保证（ ）、电网和设备安全，依据国家有关法律、法规，结合( )实际，制定电力安全工作规程。