[多选] “五个新萍乡”是指建设经济繁荣、环境优美、（）的新萍乡。

Which three IP multicast address related statements are true?（） Multicast addresses 224.0.0.13 and 224.0.0.22 are reserved link - local addresses used by PIMv2 and IGMPv3。 Because they would map to overlapping IP multicast MAC addresses, multicast addresses 224.0.1.1 and 238.1.1.1 could not be used toget her。 Multicast addresses 224.0.0.0 through 224.0.0.255 are always forwarded because they are transmitted with Time to Live (TTL) greater than 1。 Multicast addresses 224.0.0.5 and 224.0.0.6 are source multicast addresses for OSPF routers。 The a dministratively scoped multicast addresses 239.0.0.0 through 239.255.255.255 are similar in purpose to RFC 1918 private unicast addresses。 Multicast address 224.0.1.1 has been reserved for the Network Time Protocol (NTP) by the IANA。 双代号网络图能够图上清楚地表明计划的时间进程及各项工作的（）。 开始和完成时间。 超前和拖后时间。 速度和效率。 实际进度偏差。 Router R1 is configured for HSRP.  Which of the following are valid HSRP states on R1？ （）  Init。  Idle。  Active。  Standby。  Established。  Backu。 什么是操作过电压？ 民族精神是（）。 一个民族的独特人格的彰显。 一个民族的命脉所系。 民族同心、同德的关键。 民族绵延、发展的重要枢纽。 “五个新萍乡”是指建设经济繁荣、环境优美、（）的新萍乡。