《医疗器械经营许可证》的有效期是（）年，有效期届满需要延续的，医疗器械经营企业应当（）个月前，向原发证部门提出《医疗器械经营许可证》延续申请。
You develop a service application named PollingService that periodically calls long-running procedures.These procedures are called from the DoWork method.You use the following service application code： When you attempt to start the service， you receive the following error message： Could not start the PollingService service on the local computer.Error 1053： The service did not respond to the start or control request in a timely fashion. You need to modify the service application code so that the service starts properly.What should you do？（） ["Move the loop code into the constructor of the service class from the OnStart method.","Drag a timer component onto the design surface of the service. Move the calls to the long-running procedure from the OnStart method into the Tick event procedure of the timer， set the Enabled property of the timer to True， and call the Start method of the timer in the OnStart method.","Add a class-level System.Timers.Timer variable to the service class code. Move the call to the DoWork method into the Elapsed event procedure of the timer， set the Enabled property of the timer to True， and call the Start method of the timer in the OnStart method.","Move the loop code from the OnStart method into the DoWork method."]
工业化
在航空运输中，收货人提货是凭航空公司的提货通知单。
You are decommissioning domain controllers that hold all forest-wide operations master roles. You need to transfer all forest-wide operations master roles to another domain controller. Which two roles should you transfer（） ["RID master","PDC emulator","Schema master","Infrastructure master","Domain naming master"]
岩浆熔离作用：
