锅炉的停炉保养方法主要有() ["压力保养","湿法保养","干法保养","充气保养"]
国民党内部派系的斗争。
简述元认知的含义。
You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5. You create a page that contains the following control. You write the following code segment in the code-behind file for the page. void LoadDate(object sender, EventArgs e) { if (IsPostBack) { calBegin.SelectedDate = (DateTime)ViewState["date"]; } } void SaveDate(object sender, EventArgs e) { ViewState["date"] = calBegin.SelectedDate; } You need to ensure that the calBegin Calendar control maintains the selected date. Which code segment should you insert in the constructor of the page?() ["A","B","C","D"]
氨基甙类抗生素的不良反应有() [".损害第八对脑神经","损害肾脏","阻滞神经肌肉接头","A.B和C"]
类中每个对象称为()。同一类的对象具有共同的()和(),它们可以在类中统一说明,而不必在类的每个实例中重复。