进入设备内部检修人员应不少于（），设备外至少留有一个监护，（）。
You have lost datafiles 1 and 3 from your database，and the database has crashed. In what order should you perform the following steps to recover your database？（） 1. Take the datafiles that were lost offline. 2. startup mount the database 3. Issue the alter database open command. 4. Restore the datafiles that were lost 5. Recover the datafiles with the recover datafile command. 6. Bring the datafiles back online. 7. Recover the database with the recover database command. 2，1，3，4，5，6。 2，4，5，3。 4，7，3。 2，4，7，3。 2，7，3。
IT服务的财务周期包括（） 了解对IT服务的业务要求。 IT服务的预算。 IT服务的核算。 对IT服务的计费。
《权利法案》规定“凡未经议会同意，以国王权威停止法律或停止法律实施之僭越权力，为非法权力”对这一条最准确的理解是（）。 A国王与议会商讨大事成为一种制度。 B法律的权威高于国王的权威。 C国王处于“统而不治”的地位。 D国王的权力受到议会的制约。
You issued the following command： ALTER DATABASE ENABLE BLOCK CHANGE TRACKING； What will be the result of issuing this command？（） The block change tracking feature is enabled， and the information about the system change number is written in the change tracking file.。 The block change tracking feature is enabled， and the information about the log sequence number is written in the change tracking file.。 The block change tracking feature is enabled， and the information about the blocks that are changed since the last backup is written in the change tracking file.。 The block change tracking feature is enabled， and the information about the locations of the datafiles and the online redo log files are written in the change tracking file.。
南水北调工程总体规划是分别从长江的下游、中游和上游调水约（）亿m3。
