【单选题】系统 实施 阶段的主要工作内容之一是( )。
【单选题】No one will prevent him ________ doing such a silly thing.
【单选题】If doing one thing gives you an unpleasant feeling, the normal would be to stop doing it.
【单选题】若一段电路的电压和电流分别为U、I,则该段电路的功率为()
【简答题】No one will pr him _________ doing such a silly thing.
【单选题】Saying one thing and doing another is a kind of _____________.
【简答题】Paying attention to and doing only one thing at a time is ________.