多项选择题 You are developing an ASP.NET Web page that uses jQuery validation. The user should enter a valid email address in a text box that has ID txtEmail. The page must display "E-Mail address required" when the user does not enter an address and "Invalid e-mailaddress" when the user enters an address that is not formatted properly. You need to ensure that the appropriate error message is displayed when the text box does not contain a valid e-mail address.   Which two code segments should you add？（）

多项选择题 You create an ASP.NET server control in the SampleControl namespace. The control uses a JavaScript file names Refresh.js to implement AJAX functionality.You need to ensre that the JavaScript file is included in the assembly.  Which two actions should you perform？（）

多项选择题 You are developing a WCF service. The service includes an operation names GetProduct. You need to ensure that GetProduct will accept a POST request and will indicate that the returned data is XML.   Which two actions should you perform?（）