题目内容

漏电的危害主要有()。

A. 造成触电伤亡事故
B. 造成瓦斯或煤尘爆炸
C. 导致电雷管先期引爆
D. 烧毁电气设备

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进户点的横担应用()。

A. 角铁
B. 木材
C. 竹杆

湿空气经预热器前后的湿度不变。

A. 正确
B. 错误

教材对六书是如何分类的.

You have configured the following: RMAN> CONFIGURE DEFAULT DEVICE TYPE TO ’sbt’; new RMAN configuration parameters: CONFIGURE DEFAULT DEVICE TYPE TO ’sbt’; new RMAN configuration parameters are successfully stored RMAN> SHOW DEVICE TYPE; RMAN configuration parameters are: CONFIGURE DEVICE TYPE SBT PARALLELISM 1; # CONFIGURE DEVICE TYPE DISK PARALLELISM 1; # RMAN> CONFIGURE DEVICE TYPE SET PARALLELISM 5; RMAN> SHOW DEVICE TYPE; RMAN configuration parameters are: CONFIGURE DEVICE TYPE SBT PARALLELISM 5; CONFIGURE DEVICE TYPE DISK PARALLELISM 1; # How many channels are allocated to SBT?()

A. 0, because channels have not been defined.
B. 3, as indicated by the degree of parallelism.
C. 1, the default value when device is configured.
D. 5, as indicated by the last parallelism command.

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