题目内容

说明可持续发展观的深刻含义。

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智能终端就地放置的好处是()。

A. 节约常规电缆的长度
B. 提高系统抗电磁干扰的性能
C. 节约主控室占地面积

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

发电机检修后做极性试验,在取下有关电压互感器的()后投入两个()。

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

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