简述国际环境法的概念与特点。
按系统和外界的关系分类可以将系统分为哪两种？
What is the relationship between the Domain Name System （DNS） and LDAP？（） ["All the root DNS servers maintain information in a distributed LDAP tree.","DNS clients access DNS information by making LDAP queries to DNS servers.","An LDAP DN attribute is a Domain Name.","It is currently recommended to express DN as a sequence of Domain components."]
优良葡萄酵母所具有的特性。
Which two of the following are considered valid router IDs for EIGRPv6？ （） ["0.0.0.1","0.255.0.1","2001：DB8：：1","2001：DB8：ABCD：FEEF：：1"]
教学模式
