Which two statements or sets of statements are true about the application of the qos pre-classify command？（） [" If the classification policy is based upon the ToS byte， the qos pre-classify command is required because the ToS byte only appears in the inner IP header."," The ToS byte is copied to the outer header by default. Therefore， the qos pre-classify command is not necessary."," With GRE encapsulation， the qos pre-classify command is applied on the tunnel interface. This practice allows for different OoS configurations on each tunnel."," With GRE encapsulation， the qos pre-classify command is applied on the physical interface. This practice allows for different OoS configurations on each interface."," With IPsec encapsulation， the qos pre-classify command is applied on the physical interface. This practice allows for different OoS configurations on each interface."]
水土保持规划
学前教育衔接，就是指学前教育机构同（）、（）以及（）同（）的衔接，保证学前教育机构教育功能，和幼儿成长发展的连续性。
团体寿险的特点有（） ["对团体有一定的选择标准","免体检","保险金分等级制定","有保费优待","由雇主支付保费"]
关于IS-LM模型中IS曲线正确的是（）。 ["储蓄是收入的负函数","储蓄是利率的正函数","投资是收入的正函数","投资是利率的负函数"]
噬菌体
