在一个关系R中，若存在X→Y且X不包含Y，则称X→Y为非平凡依赖，否则，若存在X→Y且XY，则称X→Y为平凡依赖。
Google使用以下哪个指标来衡量一个网站的重要性和受欢迎程度？（） ["PageRank","PageView","GoogleDance","Sandbox"]
You are the desktop administrator for your company's sales department. The IT manager for the sales department needs to distribute a custom application to the Windows XP Professional computers in the sales department. He deploys the software by using Group Policy. Susan is a user in the sales department. She reports that the custom application is not available. You examine her computer, and you verify that the application is not present on her computer. You want to ensure that the software is deployed the next time Susan logs on. Which command should you run?（） ["Secedit \/refreshpolicy user_policy \/enforce","Secedit \/refreshpolicy machine_policy \/enforce","Gpupdate \/target:computer \/sync","Gpupdate \/target:user \/sync"]
《行宫》一诗的作者是（）。
下列金属中不属于有色金属的是（） ["铜","铅","锰","锌"]
在香港，单方面申请离婚的理由有哪些？
