《中华人民共和国公务员法》规定，公务员辞去公职或者退休的，原系领导成员的公务员在离职（）年内，不得到与原工作业务直接相关的企业或者其他营利性组织任职，不得从事与原工作业务直接相关的营利性活动。 ["5年","4年","3年","2年"]
动态NAT技术在网络设备中维护一个地址池。
《煤矿安全规程》规定：入井人员必须戴安全帽、随身携带（）和矿灯，严禁携带烟草和点火物品，严禁穿化纤衣服，入井前严禁喝酒。 ["急救药品","灭火器","自救器"]
毒性作用
You are creating a Windows Communication Foundation (WCF) service that responds using plain-old XML (POX).You have the following requirements: You must enable the /catalog.svc IItems operation to respond using the POX, JSON, or ATOM formats. You also must ensure that the same URL is used regardless of the result type. You must determine the response format by using the Accepts HTTP header.What should you do?（） [" Implement the IChannelInitializer interface in the service class."," Implement the System.Runtime.Serialization.IFormatterConverter interface in the service class."," Set the BodyStyle parameter of the WebGet attribute on the operation to WebMessageBodyStyle.WrappedResponse."," Set the retum type of the operation to System.ServiceModel.Channels.Message. Use the current WebOperationContext methods to return the data in the required format."]
饲料和饲养学的学习目的？
