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单项选择题 You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5.  You create an AJAX-enabled Web form by using the following code fragment.    | English | Chinese | Japan | Korean | - 73 - Test Information Co., Ltd. All rights reserved.    ...      When the updFirstPanel UpdatePanel control is updated, a dynamic client script is registered.  You write the following code segment in the code-behind file of the Web form. (Line numbers are included  for reference only.)  01 protected void Page_Load(object sender, EventArgs e)  02 {  03 if(IsPostBack)  04 {  05 string generatedScript = ScriptGenerator.GenerateScript();  06  07 }  08 }  You need to ensure that the client-script code is registered only when an asynchronous postback is issued on the updFirstPanel UpdatePanel control.  Which code segment should you insert at line 06?()

A、A

B、B

C、C

D、D

  • D
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