题目内容

干式电抗器检修关键工艺质量控制要求中铁心检修安全注意事项中工作前不必将间隔组内各高压设备充分放电。

A. 正确
B. 错误

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You are connected to a pluggable database (PDB) as a common user with DBA privileges. The STATISTICS_LEVEL parameter is PDB_MODIFIABLE. You execute the following: SQL > ALTER SYSTEM SET STATISTICS_LEVEL = ALL SID = ‘*’ SCOPE = SPFILE; Which is true about the result of this command?（）

A. The STATISTICS_LEVEL parameter is set to all whenever this PDB is re-opened.
B. The STATISTICS_LEVEL parameter is set to ALL whenever any PDB is reopened.
C. The STATISTICS_LEVEL parameter is set to all whenever the multitenant container database (CDB) is restarted.
D. Nothing happens; because there is no SPFILE for each PDB, the statement is ignored.

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