妊高征最常见的产科并发症是()

A．脑出血

B．产后循环衰竭

C．妊高征心脏病

D．胎盘早剥

E．肝被膜下出血

One solution to major security problem is __( )__ ，which are frequently installed to fix known security holes.

A．patches

B．compensations

C．complements

D．additions