You are implementing an ASP.NET application. You add the following code segment. You need to add code to return a list of all Person objects except those with a UserId that is contained in the secretUsers list. The resulting list must not contain duplicates. Which code segment should you use？（） ["var secretPeople = （from p in allPeople from u in secretUsers where p.UserId == u select p）.Distinct（）； return allPeople.Except（secretPeople）；","return from p in allPeople from u in secretUsers where p.UserId != u select p；","return （from p in allPeople from u in secretUsers where p.UserId != u select p）.Distinct（）；","List
people = new List（ from p in allPeople from u in secretUsers where p.UserId != u select p）； return people.Distinct（）；<\/person><\/person>"]
有机磷农药中高度毒性类的有（） ["苏化203","甲基对硫磷","敌敌畏","敌百虫","乐果"]
什么是年金？常见的年金有哪几种？
煤矿企业的主要负责人以单位的安全生产工作（）责任。 ["负全面、","负部分","负直接"]
Your network contains 100 servers that run Windows Server 2008 R2.A server named Server1 is deployed on the network. Server1 will be used to collect events from the Security event logs of the other servers on the network.You need to define the Custom Event Delivery Optimization settings on Server1.Which tool should you use?（） ["Event Viewer","Task Scheduler","Wecutil","Wevtutil"]
氧化物阶段？
