送电合闸操作必须按照母线侧隔离开关(刀闸)--负荷侧隔离开关(刀闸)--断路器(开关)的顺序依次操作。()
参考答案:对
Mandy, _____ university student from Canada, teaches us _____ history of western art. [ ]
A. an; the
B. a; the
C. the; /
D. the; a
股骨颈骨折常见的晚期并发症是()
A.髋关节强直
B.髋关节僵硬
C.股骨头坏死
D.骨化性肌炎
E.泌尿系感染