Refer to the exhibit. Router E learned about the PIM RP （designated as 7.7.7.7） from four different sources. Routers A and D advertised the 7.0.0.0 network via EIGRP. Routers B and C advertised the 7.0.0.0 network via OSPF. Considering that all four Ethernet interfaces on router E could potentially lead back to the PIM-RP， when router E receives the first multicast packet down the shared tree， which incoming interface will be used to successfully pass the RPF check？（） ["E0","E1","E2","E3","None of these interfaces will be used to successfully pass the RPF check","All of these interfaces would successfully pass the RPF check"]
怎样理解设计活动中的招标？
经济发展
自锁装置是有（）元件组成。 ["八种","九种","十种","七种"]
校本课程开发的主体是教师，教师的水平高低、素质优劣直接影响校本课程开发的质量。因此要完善教师（）体系，促进（）。
加速原理
