《动车组列车服务质量规范》灾害多发季节增备易于保质的食品、饮用水和应急药品，单独存放。
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Before inserting a new switch in the network， the network administrator checks that the VTP domain name is correct， the VTP mode is set to server， and revision is lower than the switches in the network. The administrator then configures interfaces and trunks， erases existing VLANs， and connects the switch to the network. Following that procedure， there is no connectivity in the network. What is a possible cause of this problem？（） Because the configuration revision of the new switches is lower than the rest of the network， it can change the VLAN database of the other switches.。 As a VTP server， the new switch deleted all VLANs of the network.。 Erasing VLANs increases the VTP configuration revision.。 Since the configuration revision of the network is higher than the new switch， the VLAN database was automatically synchronized.。
《动车组列车服务质量规范》遇火灾爆炸、重大疫情、食物中毒、空调失效、设备故障和列车大面积晚点、停运、变更径路、启用热备车底等非正常情况时，及时启动应急预案，掌握车内旅客人数及到站情况，维持车内秩序，准确通报信息，做好咨询、解释、安抚、生活保障等善后工作。
《铁路旅客运输规程》承运人与旅客、托运人、收货人因合同纠纷产生索赔或互相间要求办理退补费用的有效期为（）。
