简要说明科瑟根(Korthagen)提出的ALACT教师反思模式。
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When creating a SQL tuning set,which of the following steps allows the DBA to reduce the size of the SQL set by selecting specific operators and values?()
A. Filter versions
B. Filter loads
C. Filter tasks
D. Filter optio
集中器供电电源中断后,应有措施至少保持数据和时钟3个月。
A. 正确
B. 错误