You are a network administrator for your company. All domain controllers run Windows Server 2003. The network contains 50 Windows 98 client computers， 300 Windows 2000 Professional computers， and 150 Windows XP Professional computers. According to the network design specification， the Kerberos version 5 authentication protocol must be used for all client computers on the internal network. You need to ensure that Kerberos version 5 authentication is used for all client computers on the internal network. What should you do？ （） [" On each domain controller, disable Server Message Block (SMB) signing and encryption of the secure channel traffic. "," Replace all Windows 98 computers with new Windows XP Professional computers. "," Install the Active Directory Client Extensions software on the Windows 98 computers. "," Upgrade all Windows 98 computers to Windows NT Workstation 4.0."]
市场经济的特征包括（） ["市场主体的自主性","市场关系的平等性","市场运行的随意性","市场的统一开放性"]
解释诗句中的词语，凡属典故应说明其本事及寓意。 女娲炼石补天处，石破天惊逗秋雨。 女娲： 逗：
试述氢对焊缝金属的影响。
20世纪60年代，日本引入了美国专家戴明和朱兰的（） ["质量检测","准时制（JIT）","全面质量管理","企业流程再造（BPR）"]
简述影响知觉选择性的客观因素？
