After you back up /export using a file system snapshot, and you have removed the snapshot, you also need to remove the backing store. If the snapshot was created with: # mkdir /var/tmp/backup-snaps # fssnap -o bs=/var/tmp/backup-snaps /export Which file do you need to remove? ()
A、 A
B、 B
C、 C
D、 D
患者,男性,52岁。行硬膜外腔阻滞腹腔镜胆囊切除术,术后患者出现剧烈背痛,进行性脊髓压迫症状,伴肌无力、尿潴留、括约肌功能障碍,继而出现完全性截瘫。首先考虑患者发生了()
A、硬膜外血肿
B、麻醉药中毒反应
C、全脊髓麻醉
D、假性脑膜炎
E、麻醉平面过高
打开工作簿文件EXC.xlsx(内容同第2套电子表格题(2)中的EXC.xlsx文件),对工作表“选修课程成绩单”内的数据清单的内容进行分类汇总(提示:分类汇总前先按主要关键字“课程名称”升序排序),分类字段为“课程名称”,汇总方式为“平均值”,汇总项为“成绩”,汇总结果显示在数据下方,将执行分类汇总后的工作表还保在EXC.xlsx工作簿文件中,工作表名不变。
若两台主机在同一子网中,则两台主机的IP地址分别与它们的子网掩码相“与”的结果一定()。
A、为全0
B、为全1
C、相同
D、不同
A UDT is a data type which:()
A、must contain unique values.
B、cannot be CAST to other data types.
C、is created using the CREATE DISTINCT command.
D、contains a value that was automatically calculated from values in other columns.
Which object may be used during query optimization to improve the performance for a subset of SELECT queries?()
A、MQT
B、Trigger
C、Read Only Cursor
D、Stored Procedure