Your company has an Exchange 2010 organization that contains multiple Hub Transport servers. You have a line-of-business application that relays e-mail messages by using a Hub Transport servernamed Hub1. The application only supports sending e-mail to a single SMTP server. You need to ensure that the application can relay e-mail messages if Hub1 fails. What should you do？（） ["Implement log truncation","Install and configure failover clustering on the Hub Transport servers.","Implement Windows network load balancing on the Hub Transport servers.","Create multiple MX records for the Hub Transport servers in the internal DNS zone."]
班轮运输具有“四固定”的特点，为（） ["固定船公司，固定船期，固定航线，停靠固定港口","固定船期，固定航线，停靠固定港口，固定运费率","固定船公司，固定航线，停靠固定港口，规定运费率","规定船公司，规定船期，停靠规定港口，规定运费率"]
下面是使用椭圆选框工具创建选区时常用到的功能，请问哪些是正确的？（） [" 按住Option（Mac）\/Alt（Win）键的同时拖拉鼠标可得到正圆形的选区"," 按住Shift键的同时拖拉鼠标可得到正圆形的选区"," 按住Option（Mac）\/Alt（Win）键可形成以鼠标的落点为中心的椭圆形选区"," 按住Shift键使选择区域以鼠标的落点为中心向四周扩散"]
All servers on your company’s network run Windows Server 2008 R2. All users have thin client computers. You need to recommend a virtualization solution that allows users to use applications that run only on Windows 7. Which technology should you recommend？（） ["Windows Virtual PC","Microsoft Application Virtualization （App-V）","Microsoft Virtual Desktop Infrastructure （VDI）","Microsoft Enterprise Desktop Virtualization （MED-V）"]
当气流温度超过（）℃时，风扇离合器处于啮合状态。 ["25","45","65","85"]
学校是一种什么样的社会组织？
