题目内容

当线圈的匝数,电压不变时,电源频率增高,铁芯中磁通会()。

A. 减少
B. 增加
C. 不变

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更多问题

You notice a performance change in your production Oracle 12c database. You want to know which change caused this performance difference. Which method or feature should you use?()

A. Compare Period ADDM report
B. AWR Compare Period report
C. Active Session History (ASH) report
D. Taking a new snapshot and comparing it with a preserved snapshot

成语“送君千里”的下一句是?

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确定工程承包合同的实际价格的是()。

A. 合同总价
B. 合同单价(对于单价合同)
C. 价格调整
D. 以上选项正确

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