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百分之80的空难事故发生在起飞后三分钟和落地前八分钟，被称为（）。

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The vPC peer-gateway capability allows a vPC switch to act as the active gateway for packets that are addressed to the router MAC address of the vPC peer. This feature enables local forwarding of such packets without the need to cross the vPC peer link. Which statements are true about the vPC peer-gateway？（）

A. The vPC peer-gateway feature is enabled by default.
B. The vPC peer-gateway feature can be configured globally under the vPC domain submode.
C. Enabling the peer-gateway feature automatically disables IP redirects on all interface VLANs mapped over a vPC VLAN to avoid generation of IP redirect messages for packets switched through the peer gateway router.
D. The vPC peer-gateway feature only works with HSRP protocol.

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北京的陶然亭是中国四大名亭之一，据说亭子的名字来自一首唐诗：“更待菊黄家酝熟，共君一醉一陶然。”请问这句诗出自谁的什么作品？

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加工水平途径

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绝缘接头最大轨缝不得大于构造轨缝。

A. 正确
B. 错误

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