Refer to the exhibit. Which three statements accurately describe this GLBP topology？ （Choose three.）（） [" Router A is responsible for answering ARP requests sent to the virtual IP address."," If Router A becomes unavailable， Router B will forward packets sent to the virtual MAC address of Router A"," If another router were added to this GLBP group， there would be two backup AVGs"," Router B is in GLBP listen state."," Router A alternately responds to ARP requests with different virtual MAC addresses."," Router B will transition from blocking state to forwarding state when it becomes the AVG"]
试述传染病的基本特征。
制度层次是精神层次和物质层次的（） ["核心","主导","中介","延伸"]
假定、处理、惩罚三个要素密切联系，缺一不可，是教育法律规范的三个组成要素。
体育锻炼对智力的发展有非常重要的作用，下列明显不属于这方面作用主要表现的是（） ["体育锻炼有助于两个大脑半球的全面发展","体育锻炼能提高大脑的反应速度和综合分析能力","体育锻炼能促进大脑的生长发育","体育锻炼能加速脑部血液循环，增强抵抗力"]
简述传染病的治疗原则和治疗方法。
