表层结构
和精算现值公式无关的符号有（） ["tPd<\/sup>x","d","t","SD"]
秦始皇推行“书同文”字，作为官方通用文字的是（）。 ["金文","大篆","小篆","隶书"]
Which two of the following are designated fields for MAC tunneling protocol（802.1 ah）？（） ["Service Ethertype","ISL","PseudoLAN TAG","802.1q VLAN TAG","Control Word","Tunnel Label"]
二极管的只要参数有哪几个？各有什么含义？
简述不同游戏主题在游戏中的应用。
