简述存货的功能。
You work as an application developer at Certkiller .com. You have recently created a multithreaded application to manage Certkiller .com’s inventory system. The fulfillment task has to be executed on a regular basis， while other tasks are performed in the application. The task does not need any input to start. You are required to create and start the fulfillment thread using the appropriate code.What code should you use？（） ["A","B","C","D"]
由于个人不诚实.不正直或不轨企图，故意促使风险事故发生，引起社会财富和人身伤亡的原因和条件，称为（） ["实质风险因素","道德风险因素","心理风险因素","综合风险因素"]
选用功能价值法计算重置成本的依据是资产的生产能力与成本之间须存在（）。 ["指数关系","正向关系","反向关系","线形关系"]
简述令牌环的原理。
十二铜表法
