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管理信息库MIB-2接口组中的对象可用于故障管理和性能管理。有关接口状态的对象有ifAdminStatus和 ifOperStatus。通过什么可以检测拥塞？

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The database is running in the ARCHIVELOG mode. It has three redo log groups with one member each. One of the redo log groups has become corrupted. You have issued the following command during the recovery of a damaged redo log file： ALTER DATABASE CLEAR UNARCHIVED LOGFILE GROUP 3； Which action should you perform immediately after using this command？（）

A. You should perform a log switch
B. You should make a backup of the database
C. You should switch the database to the NONARCHIVELOG mode
D. You should shut down the database instance and perform a complete database recovery

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厂修质量保证有何规定？

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猪肺丝虫的中间宿主是（）。

A. 甲虫
B. 螺蛳
C. 蚯蚓
D. 狗

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板桩建筑物沉桩中，沿板桩墙纵轴线方向的垂直度偏差超过规定时，对于钢板桩，可采用（）的方法进行调整。

A. 调整桩尖斜度
B. 加楔形板桩
C. 调整打桩架的侧向斜度
D. 调整导向架

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