电力变压器短路阻抗实验，容量100MVA以上或电压等级220kV以上的变压器三相之间的的最大相对互差不应大于（）。
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You want to create a filter for your web application and your filter will implement javax.servlet.Filter. Which two statements are true？（）
A. Your filter class must implement an init method and a destroy method.
B. Your filter class must also implement javax.servlet.FilterChain.
C. When your filter chains to the next filter， it should pass the same arguments it received in its doFiltermethod.
D. The method that your filter invokes on the object it received that implements javax.servlet.FilterChaincan invoke either another filter or a servlet.
E. Your filter class must implement a doFilter method that takes， among other things， anHTTPServletRequest object and an HTTPServletResponse object.
You are configuring a new Catalyst switch that you want to manage remotely from workstations on other network segments within your enterprise.Which of the following are required to allow remote management of the switch over IP?（）
A. The switch name must match the workgroup name of the local network.
B. The switch must be configured with an IP address and default gateway.
C. The remote workstations must have access to the management VLAN of the switch.
D. CDP must be enabled on the switch so that it can be located by other devices on the network.
数控操作面板是经过PLC与CNC进行连接。
A. 正确
B. 错误
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