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？（）
A.A
B.B
C.C
D.D
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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?（）
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You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5. You create a Microsoft Windows Communication Foundation （WCF） service that exposes the following service contract： 01 [ServiceContract] 02 public interface IBlogService 03 { 04 [OperationContract] 05 [WebGet（ResponseFormat=WebMessageFormat.Xml）] 06 Rss20FeedFormatter GetBlog（）； 07 } You configure the WCF service to use the WebHttpBinding class， and to be exposed at the following URL： http：//www.contoso.com/BlogService You need to store the result of the GetBlog operation in an XmlDocument variable named xmlBlog in a Web form. Which code segment should you use？（）
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