You work as a database administrator for Certkiller .com. According to your backup strategy， you performed an incremental level 0 backup of your database. Which statement regarding this backup is true？（） The backup is similar to image copy.。 The backup contains all used data blocks.。 The backup contains only unused data blocks.。 The backup contains all data blocks changed since the last incremental level 1 backup.。
能够燃烧的低压液化气体共有（）种。 5。 6。 17。 25。
Which three statements are true about adaptive SQL plan management?（） It automatically performs verification or evolves non-accepted plans, in COMPREHENSIVE mode when they perform better than existing accepted plans.。 The optimizer always uses the fixed plan, if the fixed plan exists in the plan baseline.。 It adds new, bettor plans automatically as fixed plans to the baseline.。 The non-accepted plans are automatically accepted and become usable by the optimizer if they perform better than the existing accepted plans.。 The non-accepted plans in a SQL plan baseline are automatically evolved, in COMPREHENSIVE mode, during the nightly maintenance window and a persistent verification report is generated.。
用人单位账户余额少于应当缴纳的社会保险费的，社会保险费征收机构可以要求该用人单位提供担保，签订延期缴费协议。
可燃气体浓度（）爆炸下限时，即不着火也不爆炸 高于。 低于。
You are at the client site working with a WebLogic Administrator who has to type Username and Password each time he/she starts an instance og Oracle WebLogic server and is quite annoyed by it. Please suggest a secure and optimal way to reduce the typing of username passwod during server startup （）
