边际收益递增规律。
操行评定的原则是什么？
旁通管的管径应根据最低进口压力和最大出口流量确定，一般最小管径不小于DN（）mm。 ["50","80","100","120"]
装饰的作用是什么？
Based on the output provided in the exhibit， to which address or location will the router forward a packet sent to 192.168.32.1？（） [" 10.1.1.1"," 10.1.1.2"," 10.1.1.3"," The default gateway"]
自然失业率
