Your database operates in ARCHIVELOG mode. The redo log files are not multiplexed and one of the online redo logs is missing. The missing redo log sequence， 230， is not archived， and it contained information from 10：35 a.m. onwards. The current time is 11：00 a.m. Because of a disk crash， you executed the following command to perform an incomplete recovery： RMAN> RUN { 2> SET UNTIL SEQUENCE 230 THREAD 1; 3> ALTER DATABASE MOUNT; 4> RESTORE DATABASE; 5> RECOVER DATABASE; 6> ALTER DATABASE OPEN RESETLOGS; 7> }; With reference to this scenario， which statement is true？（）
A、RMAN recovers up to log sequence 230， but not including 230.
B、RMAN returns an error because the log sequence number mentioned in the command should be 229.
C、RMAN returns an error because the log sequence number mentioned in the command may never be missing.
D、RMAN recovers up to and including log sequence 229 but then returns an error because log sequence 230 is missing.
在Windows系统的资源管理器中，如果某文件夹图标前有“＋”表示该文件夹（）。
A、含有文件
B、含有子文件
C、是桌面上的应用程序
D、不含有子文件夹
简述产品服务策略？
Which CLI command copies a file called 4-0-0.rel from FTP server userpc to the router？（）
A、get 4-0-0.rel userpc：4-0-0.rel
B、get userpc：4-0-0.re l4-0-0.rel
C、copy 4-0-0.rel userpc：4-0-0.rel
D、copy userpc：4-0-0.rel 4-0-0.rel
GPRS中的域名服务器（DNS）的主要功能是什么？
Your Oracle Database 10g is online when you execute the following statement： SQL>ALTER TABLESPACE MY_TABLESPACE FLASHBACK OFF； What is the result of executing this statement if the Flashback Database feature is already enabled in the database？（）
A、 The database does not record flashback logs for MY_TABLESPACE
B、 The tables residing in MY_TABLESPACE are not protected by the Recycle Bin.
C、 All the tablespaces except MY_TABLESPACE can be recovered using Flashback Database feature.
D、 None of the flashback technologies， such as Flashback Table， Flashback Transaction Query and Flashback Version Query can be used to recover individual rows within the objects from MY_TABLESPACE