安全警示带悬挂的位置。高站台悬挂安全警示带时，安全警示带的上边缘与列车车窗下边缘平齐（距高站台地面高约为90CM）。
自发性投资
which vtp mode will not transport vlan in vtp domain？
Two routers configured to run BGP have been connected to a firewall， one on the inside interface and one on the outside interface. BGP has been configured so the two routers should peer， including the correctBGP session endpoint addresses and the correct BGP session hop-count limit EBGP multihop. What is agood first test to see if BGP will work across the firewall？（） ["Attempt to TELNET from the router connected to the inside of the firewall to the router connected to theoutside of the firewall. If telnet works， BGP will work， since telnet and BGP both use TCP to transportdata.","Ping from the router connected to the inside interface of the firewall to the router connected to theoutside interface of the firewall. If you can ping between them， BGP should work， since BGP uses IP totransport packets.","There is no way to make BGP work across a firewall without special configuration， so there is no simpletest that will show you if BGP will work or not， other than trying to start the peering session.","There is no way to make BGP work across a firewall."]
调压器室与毗连房间之间应用实体墙隔开，隔墙厚度不应小于（）cm。 ["12","24","36","50"]
简述班级授课制的特征及优缺点。
