单项选择题 You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5. You write the following code segment to create a JavaScript file named CalculatorScript.js：   function divide（a， b） {  if （b == 0） {   var errorMsg = Messages.DivideByZero；  alert（errorMsg）； return null；   }  return a/b；   }   You embed the CalculatorScript.js file as a resource in a Class Library project.  The namespace for this project is Calculator.Resources.   The JavaScript function retrieves messages from a resource file named MessageResources.resx by using the JavaScript Messages object.  You add an AJAX Web form in the ASP.NET application. You reference the Class Library in the application.  You add an ASP.NET AJAX ScriptReference element to the AJAX Web form.  You need to ensure that the JavaScript function can access the error messages that are defined in the resource file.  Which code segment should you add in the AssemblyInfo.cs file？（）

单项选择题 You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5. You create a Web form in the application by using the following code fragment：   01 <script runat="server">   02 protected void Button_Handler（object sender， EventArgs e）   03 {   04   // some long-processing operation.  05 }   06 </script>   07 <div>   08 <asp：ScriptManager ID="defaultScriptManager"   09   runat="server" />  10   11 <asp：UpdatePanel ID="defaultPanel"   12   UpdateMode="Conditional" runat="server">  13   <ContentTemplate>   14   <!-- more content here -->   15   <asp：Button ID="btnSubmit" runat="server" 16     Text="Submit" OnClick="Button_Handler" />   17   </ContentTemplate>   18 </asp：UpdatePanel>   19 </div>    You plan to create a client-side script code by using ASP.NET AJAX.  You need to ensure that while a request is being processed， any subsequent Click events on the btnSubmit Button control are suppressed.  Which code fragment should you insert at line 10？（）

单项选择题 You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5. You write the following code fragment:   <asp:ScriptManager ID="ScriptManager1" runat="server" />   <asp:UpdatePanel ID="updateLabels" runat="server" UpdateMode="Conditional">   <ContentTemplate>   <asp:Label ID="Label1" runat="server" />   <asp:Label ID="Label2" runat="server" />   <asp:Button ID="btnSubmit" runat="server" Text="Submit"   onclick="btnSubmit_Click" />  </ContentTemplate>   </asp:UpdatePanel>   <asp:Label id="Label3" runat="server" />    You need to ensure that when you click the btnSubmit Button control, each Label control value is asynchronously updatable.  Which code segment should you use?（）