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简述网络的体系结构的特点。

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膨胀压缩机超速会造成轴承过热。

A. 正确
B. 错误

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如果车轮外倾角过小的话，会导致（）

A. 轮胎外侧偏磨损严重
B. 轮胎内侧偏磨损严重
C. 轮胎胎面磨损严重
D. 轮胎内外侧磨损一样

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（）勇于奉献是开创铁路事业的需要。

A. 艰苦奋斗
B. 吃苦耐劳
C. 艰苦朴素
D. 坚持原则

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You notice a performance change in your production Oracle database and you want to know which change has made this performance difference. You generate the Compare Period Automatic Database Diagnostic Monitor (ADDM) report to further investigation. Which three findings would you get from the report?（）

A. It detects any configuration change that caused a performance difference in both time periods.
B. It identifies any workload change that caused a performance difference in both time periods.
C. It detects the top wait events causing performance degradation.
D. It shows the resource usage for CPU, memory, and I/O in both time periods.
E. It shows the difference in the size of memory pools in both time periods.
F. It gives information about statistics collection in both time periods.

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