三大空想家的社会主义学说的根本缺陷在于：（） ["理论基础是唯心史观","不了解社会主义必然代替资本主义的客观规律","没有对资本主义制度进行彻底的批判","没有发动工人运动","没有找到实现社会主义的正确道路和依靠力量"]
使用挑选工具选定群组对象中隐藏的对象，需按住的快捷键是（） ["Shift+Alt","Ctrl+Alt","Shin+Ctrl","Shift+BackSpace"]
下面（）是低位沼泽恢复与重建的指标。 ["水质","生物量","沉积物","营养物质循环"]
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You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5. You create a page that contains the following code fragment： <asp：ListBox ID="lstLanguages" AutoPostBack="true" runat="server" /> You write the following code segment in the code-behind file for the page： void BindData（object sender， EventArgs e） { lstLanguages.DataSource = CultureInfo.GetCultures（CultureTypes.AllCultures）； lstLanguages.DataTextField = "EnglishName"； lstLanguages.DataBind（）； } You need to ensure that the lstLanguages ListBox control maintains the selection of the user during postback. Which line of code should you insert in the constructor of the page？（） ["this.Init += new EventHandler(BindData); ","this.PreRender += new EventHandler(BindData); ","lstLanguages.PreRender += new EventHandler(BindData); ","lstLanguages.SelectedIndexChanged += new EventHandler(BindData)"]
焊接技能
