题目内容

When performing a full database disaster recovery with RMAN, in what order would you execute these steps?() a. Restore the control file from autobackups. b. Run the RMAN restore and recover command. c.Restore the database spfile from autobackups. d. Make the RMAN backup set pieces available. e. Open the database with the alter database open resetlogs command. f.Open the database with the alter database open command.

A. a, b, c, d, e, f
B. c, d, a, b, f
C. d, c, a, b, f
D. d, b, d, c, e
E. d, c, a, b, e

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中碳钢含碳量在0.25%~0.60%之间,由于含碳量比低碳钢高,因而可焊性()。

A. 好
B. 较好
C. 较差
D. 不可焊

在完全竞争市场上,生产要素的边际收益取决于该要素的(),而在不完全竞争市场上,边际收益取决于生产要素的()和()。

任脉属于十二经脉。

A. 正确
B. 错误

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