i5T3.1Φ160×200p排刀的标准方刀刀方为多少？Φ160×280s伺服刀架的标准方刀刀方为多少？
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用Rb-Sr同位素对变质岩石进行定年时，如何分别对原岩形成和变质事件发生的时间进行定年？
1992年邓小平在武昌、深圳、珠海、上海等地南巡讲话中提出“三个有利于”是（）。
A. 是否有利于发展社会主义社生产力
B. 是否有利于祖国统一
C. 是否有利于增强社会主义国家综合国力
D. 是否有利于提高人民的生活水平
What are three problems with the tail drop mechanism of managing interface congestion？（）
A. Queuing introduces equal delays for packets of the same flow， resulting in jitter.
B. When congestion occurs， dropping affects most of the TCP sessions， which simultaneously back off and then restart again.
C. All buffers can temporarily be seized by aggressive flows， and normal TCP flows experience buffer starvation.
D. There is no differentiated drop mechanism. Higher priority traffic is dropped in the same way as best-effort traffic.
E. In TCP starvation， traffic exceeds the queue limit because of the bursty nature of packet networks. A router cannot handle multiple concurrent TCP sessions.
F. Global synchronization occurs because multiple TCP hosts reduce their transmission rates at random intervals in response to packet dropping
采用定位销定位时，基准位移的最大值应发生在工件的（），且二者的安装接触为极限状态。
A. 孔径为最大，定位销径也为最大
B. 孔径为最小，定位销径为最大
C. 孔径为最大，定位销径为最小
D. 孔径为最小，定位销径也为最小
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