题目内容

支持EOS系统的硬件基础是()、()。

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Your multitenant container database has three pluggable databases (PDBs): PDB1, PDB2, and PDB3.Which two RMAN commands may be; used to back up only the PDB1 pluggable database?()

A. BACKUP PLUGGABLE DATABASE PDB1 while connected to the root container
BACKUP PLUGGABLE DATABASE PDB1 while connected to the PDB1 container
C. BACKUP DATABASE while connected to the PDB1 container
D. BACKUP DATABASE while connected to the boot container
E. BACKUP PLUGGABLE database PDB1 while connected to PDB2

空调机运行时蒸发器表面结冰霜可能是什么原因?

具有利水而不伤阴特点的药物是()

A. 冬瓜皮
B. 玉米须
C. 泽泻
D. 滑石
E. 通草

天然水pH值的范围为(),其对()的迁移能力有影响。

A. 4--10;变价元素
B. 4--10;酸性、中性和碱性元素
C. 6--8;微量元素
D. 5-9;碱性元素

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