由于（）的原因造成电气事故，供电企业不承担赔偿责任。
A. 不可抗力
B. 用户自身过错
C. 第三者的过错
D. 供电电压偏差超出允许范围
查看答案
钻孔变径时，要先加导向，轻压钻进3～5m后方可将导向去掉。
A. 正确
B. 错误
Which of the following options will allow you to increase the size of a thin provisioned disk in Windows Server 2012 R2？（）
A. You should add a new hard disk to the storage pool，extend the disk in File and Storage Services.
B. You should mount a new volume on the storage pool in File and Storage Services.
C. You should convert the disk to a dynamic disk in Computer Management.
D. You should convert the disk to a dynamically expanding virtual hard disk （VHD）.
E. You should detach the disk in File and Storage Services and increase its size.
最惠国待遇体现了世界贸易组织基本原则中的（）
A. 公平竞争原则
B. 正当保护原则
C. 非歧视原则
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