在干燥硬实土壤的管沟上组装管线时，管道的边缘至管沟边缘至少应保持（）的安全距离。 1m。 1.5m。 2m。 2.5m。
You completed your workflow definition. You want to save a copy of the definition to the file system for source control purposes. How does Oracle Workflow Builder save that file?（） as a flat file。 as a BPEL-compiled definition。 as an XML file with an associated document type definition (DTD)。 as an XML file without an associated document type definition (DTD)。
Identify a performance impact when using the Performance Schema.（） There is no impact on performance。 The overhead depends on the settings of the Performance Schema。 There is an overhead for querying the Performance Schema but not for having it enabled。 There is a constant overhead regardless of settings and workload。
无需办理动火证的作业是（）。 登高焊、割作业。 密闭容器内动火作业。 现场食堂用火作业。 比较密封的地下室动火作业。
A corrupted file system is now repaired and back in use. Some， but not all of the files within the file systems have been deleted. The only backup of this file system is a month-old tar archive. This archive will need to be restored as root. Which two statements correctly describe the effects of the restore operation？（） Files found in the file system that are also on tape will NOT be overwritten.。 The missing files， present on the backup tape， are restored to the file system with the data as it was when the backup was taken.。 The access times are preserved by tar and will reflect the time when a user last accessed the data.。 The modification time on the files restored by tar will be preserved and will reflect the time the file was last modified before the backup， NOT the time of the restore operation.。
水电工程工程项目划分为（）。
