证券投资的功能是什么？
性格是人在（）的基础上，在社会实践活动和不同环境熏陶下逐渐形成的比较稳定的心理特征。 ["教育","家庭","先天生理素质","自我意识"]
影响股票价格的外部因素有（）等。 ["财政政策","货币政策","公司效益","宏观经济取向"]
Your computer runs Microsoft Windows XP Professional. The computer has the following hardware configuration： 512 MB of RAM 1-GHz processor 60-GB hard disk 15 GB of free space 64-MB video adapter. You perform a clean install of Microsoft Windows Vista. You need to ensure that Microsoft Windows Aero Experience is supported. What should you do？（） ["Upgrade the memory to 1 GB of RAM.","Upgrade the hard disk to 120 GB with 40 GB of free space.","Install a video adapter that has 128 MB of RAM， support for Microsoft DirectX 9， and Microsoft Pixel Shader 2.0.","Install a video adapter that has 128 MB of RAM， support for Microsoft Scalable Link Interface （SLI） and Microsoft Pixel Shader 2.0."]
学生根据哺乳动物的关键特征，来判断某些动物是不是哺乳动物的过程是（）。 ["抽象化","概括化","归纳化","分化"]
220KV线路运行特点有什么,通常配有哪些继电保护和自动装置?
