辅助元件包括（）密封圈、压力表、油位温度计等。 ["油箱","滤油器","油管及管接头","以上均正确"]
Auto RP mapping agent 是什么，224.0.1.39 是起什么作用？
what is the routing family which the router has to build map for the routing domain？
hy you use Spanning-tree？ Difference between PVST & MST.
邪恶的世代，除了谁的神迹再没有神迹给他们看？
what is the difference between the HSRP and VRRP？
