You are maintaining an OLTP database in Oracle10g. You set the value of the LOG_ARCHIVE_TRACE parameter to zero. What is the impact of this setting？ （） [" The trace files will be disabled only for a specific session."," Tracing will be disabled for a client identifier."," Tracing will be disabled only for the ARCn process."," The SQL Trace facility will be disabled for the instance."]
电力施工单位的（）应当按照国家有关规定接受安全教育培训，考核合格方可上岗。 ["主要负责人","项目负责人","技术负责人","专职安全生产管理人员","特种作业人员"]
学习策略的教学方法有（）。 ["指导教学法","程序化训练法","定形训练法","交互式教学法","合作学习法"]
绿地绿篱造型管理标准：
You work as a database administrator for Supportcenter.cn. Your database is configured for automatic undo management. UNDO_RETENTION is set to 3 hours. You want to flash back a table that was created last year. How far back can the flashback query go？（） ["3 hours","6 months","until last year","until last commit","until the point when the undotablespacewas refreshed","until the database is shut down and the memory erased"]
教师的幸福准则。
