n a virtual port channel （vPC） configuration， VRRP exhibits which characteristic？ （） [" VRRP does not work with vPC due to industry standard requirements"," VRRP works with vPC in traditional active\/standby modes"," VRRP works with vPC in an active\/active mode"," VRRP work with vPC as long as vPC peer-gateway is configured to address non-standard replies to the physical MAC addre"]
知识经济对教育管理挑战（）。 ["对学校组织垂直化的挑战","对传统知识观的挑战","对传统人才观的挑战","对传统学习观的挑战"]
简述企业文化的层次及其关系。
元丰改制
You are deploying two core switches，one in each building，50 km away from each other. The cross-connection between them will be a Layer 2 2-gigabit EtherChannel with an 802.1Q trunk. You configured it correctly but the link does not come up. The port is in the "admin up" state，and the line protocol is in the "down" state. The fiber link is OK. What would be the most likely reason for the link not to come up？（） ["The switches are not the same model.","You are not using the correct SFP.","You are not using correct optical media converters.","Configuration should be modified， because the distance is longer."]
某中学初二（1）班学生薛某，因平时学习成绩不太好，上课总是不遵守纪律，老师们都不太喜欢他，尤其是语文老师。这天，语文讨论课上，老师让同学们自由发言进行争论。薛某起身回答问题时，由于他的观点与老师的观点不一致，因此老师很不高兴，并用刻薄的语言训斥薛某，说他“笨得像猪”。薛某听了以后很不服气，就顶了老师一句，说“你才像呢”。
老师一气之下就把薛某赶出了教室，并说，“既然我像猪，以后你就不要再来上我的课了！”。
本案对我们有哪些启示？
