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威布尔分布的参数k和c分别被称作什么?

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You started a long transaction. Before committing, you executed a query on one of the tables currently being modified. You received the following error: ORA-01555: snapshot too old How would you prevent such an error in the future?()

A. guarantee undo retention
B. add one more redo log group
C. size the redo log files appropriately
D. size the UNDO tablespace appropriately
E. size the SYSTEM tablespace appropriately
F. configure an appropriate undo retention interval
G. change automatic undo management to manual

往复式压缩机活塞环和支撑环在安装过程中有什么要求?

等电位作业人员在电位转移前,应得到工作负责人的许可。

A. 正确
B. 错误

2005年11月,全国本科教学评估专家对湖南大学学生的评价是什么?

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