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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"]
Your network consists of a single Active Directory domain. All domain controllers run Windows Server 2008 R2. The network contains 100 servers and 5,000 client computers. The client computers run either Windows XP Service Pack 1 or Windows 7. You need to plan a VPN solution that meets the following requirements: èStores VPN passwords as encrypted text èSupports Suite B cryptographic algorithms èSupports automatic enrollment of certificates èSupports client computers that are configured as members of a workgroup What should you include in your plan?（） ["Upgrade the client computers to Windows XP Service Pack 3. Implement a stand-alone certification authority （CA）. Implement an IPsec VPN that uses certificate-based authentication.","Upgrade the client computers to Windows XP Service Pack 3. Implement an enterprise certification authority （CA） that is based on Windows Server？2008 R2. Implement an IPsec VPN that uses Kerberos authentication.","Upgrade the client computers to Windows 7. Implement an enterprise certification authority （CA） that is based on Windows Server 2008 R2. Implement an IPsec VPN that uses pre-shared keys.","Upgrade the client computers to Windows 7. Implement an enterprise certification authority （CA） that is based on Windows Server 2008 R2. Implement an IPsec VPN that uses certificate-based authentication."]
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"]
晓来谁染霜林醉，总是离人泪。作者（）
