A signal derived from a controlled function and returned to the initiating point is called a/an （）...

第1题

A、identit ysignal、reply signal、interrogation signal B、interrogation signal、identity signal、reply signal C、identity signal、interrogation signal、reply signal D、reply signal、identity signal、interrogation signal

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第2题

[单选题] You are creating a Windows Forms application by using the .Net Framework 3.5.You plan to design a composite control for the application.You need to derive the control from a base class that supports templates.What should you do？（）

A、Derive from the Control class. B、Derive from the UserControl class. C、Derive from the ScrollableControl class. D、Derive from the ContainerControl class.

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第3题

[] The SCTP layer in the C7 signalling protocol stack is responsible for which of the following:（）

A、A. Establishing a signaling channel between two signaling entities in an ATM network B、B. Provide reliable connection for signaling between two IP signaling nodes C、C. Provide routing for IP signaling messages in an IP signaling network

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第4题

[] You are creating a Windows Forms application by using the .NET Framework 3.5.You plan to develop a custom control for the application. The control will be a composite control.Your need to derive from the class that will create the control by using the minimum amount of development effort.What should you do？（）

A、A.Derive from the Control class. B、B.Derive from the UserControl class. C、C.Derive from the FrameworkElement class. D、D.Derive from the ContainerControl class.

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第5题

[单选题] You are creating a custom control. The UI of the control must contain several text boxes and 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.

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第6题

[单选题] You are creating a custom control. The UI of the control must contain several text boxes and 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.

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第7题

[单选题] You are creating a custom control. The UI of the control must contain several text boxes and 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.

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第8题

[单选题] A 200-meter vessel is aground in fog. Which signal is optional? （）

A、A bell signal B、A gong signal C、A whistle signal D、All of the above

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第9题

[单选题] （）is the most visible signal of distress from a lifeboat at sea in the daytime.

A、Smoke signal B、Flash signal C、Fire signal D、Radio emergency transmission

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A signal derived from a controlled function and returned to the initiating point is called a/an （）.

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