自主学习的特点是（）。 ["能动性","客体性","独立性","依赖性","主体性"]
Which three choices are BGP Extended communities used in MPLS-VPN deployment？（） ["Site Of Origin SOO","Route-Target","Route-Distinguisher","Domain Identifier BGP extended commumity"]
侵犯
散文诗最初由谁开始写作的？（） ["爱伦坡","屠格涅夫","波德莱尔","魏尔伦"]
In multicast network how to select DR？ and what is the order？
生物污染
