SMTP协议用于接收电子邮件。
DHCP用于手动分配静态IP地址。
浩然之气
香港、澳门特别行政区基本法的修改权属于（）。 ["香港、澳门特别行政区立法会","全国人民代表大会","香港、澳门特别行政区行政","全国人民代表大会常务委员会"]
You are developing an application that receives events asynchronously.You create a WqlEventQuery instance to specify the events and event conditions to which the application must respond.You also create a ManagementEventWatcher instance to subscribe to events matching the query.You need to identify the other actions you must perform before the application can receive events asynchronously.Which two actions should you perform？（） ["Start listening for events by calling the Start method of the ManagementEventWatcher.","Set up a listener for events by using the EventArrived event of the ManagementEventWatcher.","Use the WaitForNextEvent method of the ManagementEventWatcher to wait for the events.","Create an event handler class that has a method that receives an ObjectReadyEventArgs parameter.","Set up a listener for events by using the Stopped event of the ManagementEventWatcher."]
造成直流电动机转速太低或不均匀地转动的原因有哪些？
