主要经肠道外途径传播的肝炎病毒为：（） ["乙型肝炎病毒（HBV）","甲型肝炎病毒（HAV）+戊型肝炎病毒（HEV）","甲型肝炎病毒（HAV）+丙型肝炎病毒（HCV）","乙型肝炎病毒（HBV）+丙型肝炎病毒（HCV）+丁型肝炎病毒（HDV）"]
横向研究
下面关于软件问题报告的描述中，不正确的是（）。 ["它是测试实施过程中最重要的文档","软件问题报告有生命周期","便于对软件质量进行追踪和控制","不需要建立软件问题报告数据库管理系统"]
交流电动机，由正转到反转只要改变电机电源（）个接头 ["1；","2；","3；"]
Your network consists of a single Active Directory domain. The network contains two Windows Server 2008 R2 computers named Server1 and Server2. The company has two identical print devices. You plan to deploy print services. You need to plan a print services infrastructure to meet the following requirements： èManage the print queue from a central location. èMake the print services available， even if one of the print devices fails. What should you include in your plan？（） ["Install and share a printer on Server1. Enable printer pooling.","Install the Remote Desktop Services server role on both servers.Configure Remote Desktop Connection broker（RD Connection Broker）.","Install and share a printer on Serve1. Install and share a printer on Server2. Use Print Management to install the printers on the client computers."," Add Server1 and Server2 to a Network Load Balancing cluster. Install a printer on each node of the cluster."]
生态阈限
