新建、改（扩）建设备的竣工验收和主变压器及1lOkV及以上主设备大修后竣工验收，班组长（或技术负责人）必须参加验收，值班长、值班员可以不参加。
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After mirroring rootvg， a system administrator wants to validate that the system will boot correctly. Which of the following tasks must be performed before changing the boot order？（）
A. Run a bosboot -a command
B. Mirror the hd5 on the two disks
C. Set up another service mode bootlist
D. Check the disks using a lsvg -p rootvg command
U形抱箍圆钢的直径为（）。
A. 13mm
B. 14mm
C. 15mm
D. 16mm
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