多项选择题
A.Undo tablespace
B.USERS tablespace
C.SYSAUX tablespace
D.SYSTEM tablespace
E.Temporary tablespace
多项选择题 Identifytwosituationsinwhichtheblockheadergrowsinadatablock.（）
多项选择题 Whichtwostatementsaretrueregardingatablespace（）
单项选择题 Your database is configured in shared server mode. However， your senior DBA asks you to modifythe value of the PRIVATE_SGA limit in the profile of the users. What could be the reason for this（）