How are the twin brothers? They are _____ fine. [ ]
A. all
B. both
C. either
D. neither
答案:B
髂内动脉栓塞在几周后栓塞剂可被吸收()
A.2~4周
B.2~3周
C.3~4周
D.3~5周
E.3~6周
简述客户受送电装置电气设备安全运行及管理状况检查业务的工作流程?