Which three are advantages of SONET？（） ["Allows the transportation of all forms of traffic","Multiplexing is easy","Clocks do not need to be synchronized","Reduces network complexity and cost","Padding is not necessary and not permitted"]
春秋战国时期，百家争鸣，思想活跃。主张“不期修古，不法常可”，“事异则备变”的思想家是（） ["老子","孔子","墨翟","韩非"]
根据纯预期理论、流动性理论，下列正确的是（）。 ["在预期利率上升时，LP理论比PE理论的收益曲线斜率更小","在预期利率不变时，LP理论比PE理论的收益曲线更向下倾斜","在预期利率下降时，LP理论比PE理论的收益曲线平坦些","在预期利率不确定时，LP理论比PE理论的收益曲线变动幅度更小"]
Which command can be a router to verify the layer 3 path to a host?（） [" traceroute address"," tracert address"," ssh address"," telnet addre"]
产业集群
质量管理体系
