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。
列车长每次在出乘前均编制有趟计划，趟计划在（）中显示。 乘务报告。 乘务工作。 列车返乘汇报。 广播计划。
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.。
发动机怠速工况
乳中含量最多的水是（）水
