What is the purpose of the until change option of the restore command？（） It allows you to select the SCN that you want to restore to.。 It allows you to select the log sequence number you want to restore to.。 It allows you to select the timestamp you want to restore to.。 It allows you to manually stop the restore at any time as online redo logs are applied.。 None of the above.。
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)。
屋面卷材防水施工时，泛水处卷材应向垂直面上翻，其高度不宜小于（）。 200。 250。 300。 350。
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。
IT服务管理是基于（）
