Which configuration is used to enable root guard？（） ["interface gig3\/1 spanning-tree guard root","interface gig3\/1 spanning-tree root guard","interface gig3\/1 spanning-tree root-guard","interface gig3\/1 spanning-tree root-guard default"]
典型的自学辅导式的教学组织形式，是指（）。 ["分组教学制","道尔顿制","文纳特卡制","开放课堂"]
若512K位（bit）SRAM芯片具有4条数据线，则它具有的地址线条数为（） ["15","16","17","18"]
家蚕有哪种病被国家列入强制性检疫对象？
悬架是车架与车桥之间的（）装置。 ["断开","闭合","链接","辅助"]
情感深刻化
