《党和国家民族政策宣传教育提纲》指出，（）是解决我国民族问题的重大原则。
A. 和谐发展
B. 尊重民族风俗习惯
C. 民族团结
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If an edge Label Switch Router （LSR） is properly configured，which three combinations are possible？（）
A received IP packet is forwarded based on the IP destination address and the packet is sent as an IP packet.
B. An IP destination exists in the IP forwarding table. A received labeled packet is dropped because the label is not found in the LFIB table.
C. There is an MPLS label-switched path toward the destination. A received IP packet is dropped because the destination is not found in the IP forwarding table.
D. A received IP packet is forwarded based on the IP destination address and the packet is sent as a labeled packet.
E. A received labeled IP packet is forwarded based upon both the label and the IP address.
F. A received labeled packet is forwarded based on the label. After the label is swapped，the newly labeled packet is sent.
以低碳钢为例说明焊接接头在组织、性能上较为薄弱的部位是哪个部位，为什么？
艾里克森认为，以“获得繁殖感而避免停滞感，体验关怀的实现”的阶段是（）。
A. 学龄期
B. 青年期
C. 成年早期
D. 中年期
E. 老年期
因婚姻迁移异地居住的人员属于《流动人口计划生育工作条例》所称流动人口吗？
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