正常情况下，用电单位用电设备容量当大于多少时，应以高压方式供电()

A．160kVA

B．160kW

C．250kVA

D．250kW

A multigravida at 36 weeks' gestation visits the emergency department because her boyfriend has beaten her severely. What should the nurse do first

A．Contact the authorities.

B．Ensure the client's safety.

C．Identify a support person.

D．Photograph the client's injuries.