监狱管理为什么要对罪犯进行分类？
In your test database， you have created the ORDERS table as an indexorganized table （IOT）. To facilitate faster querying， you have created a mapping table and a bitmap index on the ORDER_FILLED column. You observe that the query performance degrades when users perform a large volume of transactions. While investigating the reason， you find that the mapping table segment is fragmented， leading to poor performance. Which option would you use to defragment the mapping table without affecting the original table data？（） export and import the mapping table。 drop and recreate the mapping table。 truncate the mapping table and reinsert the values。 use the ALTER TABLE .. REBUILD command to defragment the mapping table。
各种微生物具有一些共同点，下列选项中描述错误的是（） 分布广，种类多。 适应强，易变异。 体积小，表面积小。 生长速，繁殖旺。
出现粪便黑色，有光泽，且粪便潜血试验呈阳性症状时，首先考虑的疾病是（） 阿米巴痢疾。 过敏性肠炎。 痔疮、肛裂。 胃、十二直肠溃疡伴出血。
An administrator is attempting to recover a filesystem that fails to manually unmount. The fsck command produces the following output： The current volume is： /dev/fslv02 File system is currently mounted. Invalid file system size in the primary superblock. Invalid file system size in the secondary superblock. Primary superblock is corrupt. Secondary superblock is corrupt. fsck： 0507-018 Superblock is corrupt and cannot be repaired. Both primary and secondary copies are corrupt.Cannot continue tried to mount Which steps will resolve the problem？（） Reboot the server into maintenance mode and run ‘fsck’ with the ‘-p’ parameter while the filesystem is mounted.。 Reboot the server into maintenance mode and run ‘fsck’ with the ‘-y’ parameter while the filesystem is unmounted.。 Force a umount of the filesystem with ‘umount -F /dev/fslv02’， and then run ‘fsck -p /dev/fslv02’ while the filesystem is unmounted.。 Force a umount of the filesystem by varying off the hosting volume group and then varyon the volume group. This will permit ‘fsck -y’ to be run against the failing filesystem.。
人工费、材料费及机械台班费属于工程造价中的（）
