单项选择题
A.animation-duration属性
B.animation-timing-function属性
C.animation-delay属性
D.animation-direction属性
未知题型 UML(统一建模语言)支持的建模方式中不包括(53)，UML中不包括的事件有(54)。其中表示对象相互行为的模型是(55)模型。
未知题型 设有下列二叉树：对此二叉树中序遍历的结果为______。
未知题型 You are the administrator for your company's network. The network is configured as shown in the exhibit.You want to install Windows 2000 Professional on 20 new PXE-compliant computers on the marketing segment of your network. The new computers do not have operating systems installed.You create a RIS image. You load the image onto the RIS server. You then start the new computers.You find that the new computers cannot connect to the RIS server. You verify that the new computers cannot connect to the RIS server. You verify that the existing client computers in the network can connect to the network servers, including the RIS server. You want to enable the new computers to connect to the RIS server.What should you do?