You are implementing an ASP.NET MVC 2 application. In the Areas folder， you add a subfolder named Product to create a single project areA. You add files named ProductController.vb and Index.aspx to the appropriate subfolders. You then add a file named Route.vb to the Product folder that contains the following code.01 Public Class Route Inherits AreaRegistration02 03 Public Overrides ReadOnly Property AreaName As String04 Get 05 Return "product"06 End Get 07 End Property08 09 Public Overrides Sub RegisterArea（ByVal context As AreaRegistrationContext）10 11 context.MapRoute（"product_default"， "product/{controller}/{action}/{id}"， New With {.controller = "Product"， .action = "Index"，.id = ""}）12 13 End Sub End Class When you load the URL http：///product， you discover that the correct page is not returned. You need to ensure that the correct page is returned. What should you do？（）
（）是指由水泥、细骨料、矿物掺合料、外加剂和水以及根据性能确定的其他组分，按一定比例，在搅拌站经计量、拌制后、运至使用地点，并在规定时间内使用完毕的拌合物。 A.干混砂浆 。 B.湿拌砂浆 。 C.水泥砂浆 。 D.石灰砂浆。
You create a new ASP.NET MVC 2 Web application. The following default routes are created in the Global.asax.vb file.01 Shared Sub RegisterRoutes（ByVal routes As RouteCollection）02 03 routes.IgnoreRoute（"{resource}.axd/{*pathInfo}"）04 05 routes.MapRoute（ "Default"， "{controller}/{action}/{id}"， New With {.controller = "Home"， .action = "Index"， .id = ""}） 06 End Sub You implement a controller named HomeController that includes methods with the following signatures.Function Index（） As ActionResult Function Details（ByVal id As Integer） As ActionResultFunction DetailsByUsername（ ByVal username As String） As ActionResult You need to add a route to meet the following requirements. The details for a user must be displayed when a user name is entered as the path by invoking the DetailsByUsername action. User names can contain alphanumeric characters and underscores， and can be between 3 and 20 characters long.What should you do？（）
期权
平均利润是通过（）形成的。 部门内部的竞争。 部门之间的竞争。 技术进步。 资本有机构成提高。
关于甲型肝炎的诊断， 哪一说法是错误的：（）
