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【单选题】
You work as a database administrator for Supportcenter.cn. You are using Recovery Manager （RMAN） for backup and recovery of your database. You executed the delete command in RMAN to delete a backup of a tablespace. Which statement is true in this scenario？（）A.
The backup status will be marked expired in RMAN recovery catalog.
B.
The backup status will be marked deleted in RMAN recovery catalog after you execute the crosscheck command.
C.
The backup will be deleted physically from the OS （Operating system）and the backup information is removed from the recovery catalogl
D.
The backup status will be marked deleted and you must delete the backup file manually from the OS （Operating system）.
E.
The backup status will be marked deleted and you must delete the backup file manually from the OS （Operating system）， if you are not using Oracle Managed Files （OMF）.
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【单选题】出现甲状腺功能亢进症状的主要是因为( )。
A.
甲状腺分泌促甲状腺激素过多
B.
甲状腺分泌甲状腺激素过少
C.
甲状腺分泌促甲状腺激素过少
D.
甲状腺分泌甲状腺激素过多
E.
甲状腺分泌促甲状腺激素释放激素过少
【简答题】教育对人类地位的提升表现在（ ）。
【简答题】甲状腺激素抑制试验的诊断标准是：抑制率______为甲状腺功能亢进，抑制率______为甲状腺功能正常。