在事故树分析中，已知事故树的某个径集，在此径集中去掉任意一个基本事件后，就不再是径集（即剩余的基本事件不发生不一定导致顶事件不发生），则这个径集被称为（） ["径集","割集","最小割集","最小径集"]
You need to design an administrative model that meets the business and technical requirements. What should you do？（） ["Assign permissions to manage Mailbox and Exchange Server configuration to the server-admins group","Assign permissions to manage Mailbox and Exchange Server configuration to the domain-admins group","Assign permissions to manage Mailboxes to the server-admins group. Assign permissions to manage Exchange Servers configuration to the domain-admins group","Assign permissions to manage Mailboxes to the domain-admins group. Assign permissions to manage Exchange Servers configuration to the server-admins grou"]
煤气管道如需穿过不使用煤气的生活间必须设有（）。 ["报警器","套管","通风道"]
乡村债务形成的原因包括（）。 ["收入不抵支出，盲目投资","在财政投资严重不足的条件下发展农村社会事业","借债的成本大于收益","上级任务多，集体积累少"]
简述酶反应器设计的主要内容。
熔敷系数
