以动物组织为原料提取多肽和蛋白质类物质时，为了获得安全性高，活性高，收率高的目的物，在选材上应注意的问题有（）、（）、（）、（）和（）。
以下哪些内容是路由信息中所不包含的（） [" 源地址"," 下一跳"," 目标网络"," 路由权值"]
Which two commands correctly verify whether port security has been configured on port FastEthernet 0/12 on a switch?（） [" SW1#show swithport port-security interface FastEthernet 0\/12"," SW1# show swithport port-secure interface FastEthernet 0\/12"," SW1# show port-secure interface FastEthernet 0\/12"," SW1#show running-config"," SW1#show port-security interface FastEthernet 0\/12"]
On the basis of the definitions of different services in various RFCs， traffic with Expedited Forwarding per-hop behavior should be marked as which of these？（） ["IP ToS of 0xEF","IP experimental ECN","DSCP decimal 5","Binary value of 101110"]
晏阳初针对农村“愚、穷、弱、私”的根本问题提出的“四大教育”包括哪些内容？
最大起升高度
