[填空题] 常用的纯化多糖的方法有（），（），（），（），凝胶过滤法，还有（）和（）适用于粘多糖的纯化。

世界上最大的民主国家是：（） ["中国","印度","美国","俄罗斯"] GLBP benefit？ 非晶质结构 民主斗士变成专制魔王的原因是：（） ["权力使人腐败","伪民主斗士","文化传统","以上说法都正确"] Which two of these statements are true of IPv6 address representation?（） [" There are four types of IPv6 addresses: unicast, multicast, anycast, and broadcast."," A single interface may be assigned multiple IPv6 addresses of any type."," Every IPv6 interface contains at least one loopback address."," The first 64 bits represent the dynamically created interface ID."," Leading zeros in an IPv6 16 bit hexadecimal field are mandatory."] 常用的纯化多糖的方法有（），（），（），（），凝胶过滤法，还有（）和（）适用于粘多糖的纯化。