熙宁二年，苏辙《上皇帝书》说凡今农、工、商贾之家，未有不舍其旧而为士者也。”这表明（）。 ["唐代四民界限模糊","唐代商品经济繁荣","宋代小农经济衰落","宋代科举制的发展"]
现代教学手段的多媒体化
制麦
Which of the following is true regarding Label Distribution Protocol （LDP）？（） ["It is a label distribution protocol for MPLS","It is a set of procedures and messages by which LSRs establish Label Switch Paths （LSPs） through a network","Tag distribution Protocol （TDP） was the basis for LDP","All of the above are true"]
简述类比与对比的关系。
两ebgp邻居发路由过来 ，哪些属性重置？
