甾体皂苷及其皂苷元的旋光度几乎都是左旋。（)

eb application. You define a number of properties that the user can set at design time. You need to group these properties in the Properties dialog box. In addition, you need to ensure that when users click on a particular property, they receive a short explanation of that property. The properties are shown in the exhibit. Which two actions should you perform？（）

A. Attach the Category attribute class to the controls class definition. Set its value to UserAddress. Mark the class as public.

B. Attach the Browsable attribute class to each property in the group. Set its value to True. Mark the property as private.

C. Attach the Category attribute class to each property in the group. Set its value to UserAddress. Mark the property as public.

D. Attach the Description attribute class to each property in the group. Set each value to a description of the given property.

E. Attach the DefaultProperty attribute class to each property in the group. Set each value to a description of the given property.

the Web control to your Web application pages without compiling your control into a .dll file.What should you do？（）

A. Ensure that the Web control inherits from the WebControl class.

B. Ensure that the Web control inherits from the Control class.

C. Ensure that the Web control inherits from the CompositeControl class.

D. Ensure that the Web control inherits from the UserControl class.

nd two buttons. The control must be available in the global assembly cache for reuse across multiple Web applications. You need to achieve this functionality by using the minimum amount of code.What should you do？ （）

A. Create a control that derives from System.Web.UI.Control.

B. Create a control that derives from System.Web.UI.WebControls.CompositeControl.

C. Create a control that derives from System.Web.UI.WebControls.WebControl.

D. Create a control that derives from System.Web.UI.UserControl.

nd two buttons. The control must be available in the global assembly cache for reuse across multiple Web applications. You need to achieve this functionality by using the minimum amount of code. What should you do？ （）

A. Create a control that derives from System.Web.UI.Control.

B. Create a control that derives from System.Web.UI.WebControls.CompositeControl.

C. Create a control that derives from System.Web.UI.WebControls.WebControl.

D. Create a control that derives from System.Web.UI.UserControl.

d control by using the following code segment.You need to ensure that the wizard automatically sends an e-mail message to users when they finish creating their accounts. You add a valid element to the Web.config file.Which code segment should you add to the Page_Load event？（）

A.Wizard1.RequireEmail = True

B.Wizard1.Email = "user@address.com"

C.Wizard1.MailDefinition.From = "registration@mysite.com"

D.SmtpMail.SmtpServer = "mail.contoso.com"

ay news items by using an instance of a mobile TextView control named TextViewNews. You need to configure the Web Form that contains TextViewNews. The Web Form must enable pagination in casea users device does not display the full text of a news item.Which code segment should you use？ （）

A.

B.

C.

D.

You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application.The application contains a composite user control that includes a TextBox control named txtInput.The user control will be hosted in a window and will have handlers for the text-changed event of txtInput.You need to ensure that the application meets the following requirements:Creates a text-changed event handler named Audit_TextChanged for the txtInput control.Executes Audit_TextChanged even when specific handlers mark the event as handled.Which code segment should you add to the constructor of the user control？（）

A.txtInput.TextChanged+=Audit_TextChanged;

B.AddHandler(TextBox.TextChangedEvent, new RoutedEventHandler(Audit_TextChanged), true);

C.EventManager.RegisterClassHandler(typeof(TextBox), TextBox.TextChangedEvent, new RoutedEventHandler(Audit_TextChanged), true);

D. EventManager.RegisterClassHandler(typeof(TextBox), TextBox.TextChangedEvent, new RoutedEventHandler (Audit_TextChanged), false);

ms for an ASP.NET Web site that allows users to register and log on to a personalized experience. The custom user control uses two TextBox controls and two Button controls. You need to ensure that the controls are visible only when users are not logged on to the Web site. You also need to minimize the amount of effort in development and maintenance for the Web site.Which two actions should you perform？ （）

A. Add the OnClick event handler for the Login button to the code used in the custom user control.

B. Add the OnClick event handler for the Login button to the code used in the Web Form where the control is added.

C. In the Page_Load method of the Web Form, add a code segment to set the visibility of the TextBox and Button controls where the control is added.

D. In the Page_Load method of the custom user control, add a code segment to set the visibility of the TextBox and Button controls.

Whenever you catch negative saying, you should ______.

A．avoid creating resistance

B．question your own talk

C．try to think positively

D．turn around and stop thinking

ght.

A．Y

B．N

C．NG