You perform differential incremental level 1 backups of your database on each working day and level 0 backupon Sundays， to tape. Which two statements are true about differential incremental backups（） The backup performed on Sundays contains all the blocks that have ever been used in the database.。 The backup performed on Sundays contains all the blocks that have changed since the last level 1 backup.。 The backup performed on each working day contains all the blocks that have changed since the last level 0 backup.。 The backup performed on Monday contains all the blocks that have changed since the level 0 backup， and every other working day contains all the blocks that have changed since the level 1 backu。
项目法人通过（）方式择优选择南水北调工程项目勘察设计单位和监理单位，其勘察设计合同和监理合同可由项目法人委托项目管理单位管理。 监理。 招标。 管理。 投资。
张某，在全麻下行下肢手术，其术后进食时间为（） 术后6h。 术后sh。 术后12h。 术后16h。 术后24h。
经检查不合格的液化石油气钢瓶按（）分别进行登记。 待充装。 待修。 送检。 报废。
A System x sales specialist is creating a proposal for a Unix-installed account. The customer is looking to migrate several business-critical applications onto Linux running on Intel. Which of the following should help IBM meet the customer’s requirements？（） Propose VMware with Linux on Intel as a solution.。 Provide a special bid on the System x servers.。 Include migration services within the proposal.。 Provide a warranty offering with guaranteed fix levels.。
封堵作业中，若管线内介质为气体，则管件焊接时的流速不应大于（）米/秒。
