[问答题] 6KV厂用电源切换时的注意事项。

You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application.  You create a window that contains a Button control and a MenuItem control. Both controls are labeled "Add sugar."  The Command properties of the Button and MenuItem controls are set to the same RoutedCommand named AddSugarCommand. You write the following code segment.  private void CanAddSugar (object sender, CanExecuteRoutedEventArgs e) { ... } You need to ensure that when the CanAddSugar method sets e.CanExecute to false, the MenuItem and Button controls are disabled.  What should you do?（） [" Create an event handler for the CanExecuteChanged event of the AddSugarCommand command. Call the CanAddSugar method from within the event handler."," Inherit the AddSugarCommand from the RoutedUICommand class instead of the RoutedCommand class. Call the CanAddSugar method from within the constructor of the AddSugarCommand command."," Add a CommandBinding object to the CommandBinding property of the MenuItem control. Set the CanExecute property of the CommandBinding object to the CanAddSugar method."," Add a CommandBinding object to the CommandBindings property of the window. Set the Command property of CommandBinding to the AddSugarCommand command. Set the CanExecute property of the CommandBinding object to the CanAddSugar method."] 个体对特定事件的应激感受性主要受哪些因素影响？（） ["人对情景的知觉","个性差异","过去经历","社会支持"] 法人投资是指法人单位以资产投入企业的行为 进口商申请开立信用证的程序包括（）。 ["递交有关合同副本及附件","填写开证申请书","缴付保证金","支付开证手续费","在开证申请书背面签字"] 对两个关系按照一方的主码进行自然连接，在其运算结果的关系中，其元组个数必然大于等于原有两个关系中的元组个数之和。 6KV厂用电源切换时的注意事项。