下列不属于原生金融工具的是（）。A. 外汇B. 期货C. 货币D. 债券

endby using a NetworkStream object named netStream.You need to use a cache of size 8,192 bytes.Which code segment should you use？（）

A.

B.

C.

D.

method named GetCurrentRate that retrieves the current interest rate and a variable named currRate that stores the current interest rate.You write serialized representations of the class.You need to write a code segment that updates the currRate variable with the current interest ratewhen an instance of the class is deserialized.Which code segment should you use？（）

A.

B.

C.

D.

the following code segment.The application contains a form of type Form1 that contains a FormSettings object named frmSettings1.You need to maintain the user‘s form size preference each time the user executes the application.Which code segment should you use？ （）

A.

B.

C.

D.

You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application.You write the following code fragment.You need to ensure that the ButtonHandler method is not executed when the user clicks the CancelButton button.Which code segment should you add to the code-behind file？（）

A.

B.

C.

D.

A．

B．

C．

D．

A．

B．

C．

D．

You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application.You write the following code fragment.You create an event handler named StackPanel_PreviewTextInput. You also have a collection of strings named Keywords.You need to ensure that TxtBoxA and TxtBoxB do not contain any of the strings in the Keywords collections.Which code segment should you use？（）

A.

B.

C.

D.

You define the following regular expression of currency values:regex tx = new regex("^-？\d+(\.\d{2})？$")You are required to write code that will be used to find whether a string in the variable named Bill matches the regular expression or not. You are also required to use this code as the expression in a conditional statement and need to know which code segment to use.What should you do？（）

A.The tx.Matches（Bill）

B.The tx.Equals（Bill）

C.The tx.Match（Bill）

D.The tx.IsMatch（Bill）

(Line numbers are included for reference only.)01 DataTable dt = new DataTable(Products”);02 dt.Columns.Add(new DataColumn(Price”, typeof(decimal)));03 dt.Columns.Add(new DataColumn(Quantity”, typeof(Int32)));04 DataColumn dc = new DataColumn(Total”, typeof(decimal));05 dt.Columns.Add(dc);You need to ensure that the Total column is set to the value of the Price column multiplied by the Quantity column when new rows are added or changed. What should you do？ （）

A. Add the following code segment after line 05. dc.ExtendedProperties["Total"] = "Price * Quantity”;

B. Add the following code segment after line 05. dc.Expression = “Prince * Quantity”;

C. Write an event handler for the DataTable‘s TableNewRow event that updates the row‘s Total.

D. Write an event handler for the DataTable‘s ColumnChanged event that updates the row‘s Total.