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(难度:中等)typeof null 返回 object

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考题 You are developing a Asp.net web application tht includes a panel control that has ID contentsection.You need to add a textBox control to the panel control.()A、this.RequireControlState(this.LoadControl(typeof(TextBox),null));B、this.ContentSection.control.add(this.FindControl(ContentSection.ID + "asp:TextBox"));C、this.ContentSection.control.add(this.LoadControl(typeof(TextBox),null));D、this.LoadComplete("asp:TextBox").IntiantiateIn(Content Section)

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考题 填空题typeof NaN,typeof Array的结果分别是(), “object”。

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