下面程序段执行完毕，页面显示的内容是（）。 string strName; strName = "user_name"; Session["strName"] = "Mary"; Session[strName] = "John"; Response.Write（Session["user_name"]);A．MaryB．JohnC．user_nameD．语法有错，无法正常运行

设在工程中有一个标准模块，其中定义了如下类型： Type stutype ino As Integer strname As String*20 strsex As String*1 smark As Single End Type 在窗体上画一个名为Connnand1的命令按钮，要求当执行事件过程Command1_Click时，在c:\的随机文件student..dat写入一条记录。下列能够完成该操作的事件过程是( )。

A．Sub Command1_C1ick() Dim student As studtype Dim record_no As Integer record_no=1 With student .ino=12 .strname="smith" .strsex="男" .smark=89 End With Open" c:\student.dat" For input As # 1 len=len(student) Put # 1,record_

B．Sub Command1_Click( ) Dim student As studtype Dim record_no As Integer record_no=1 With student .ino=12 .strname="smith" .strsex="男" .smark=89 End With Open"c:\student.dat" For random As #1 len=len(student) Put #1,record_n

C．Sub Command1_Click() Dim student As studtype Dim record_no As integer record_no=1 With student .ino=12 .stmame="smith" .strsex="男" .smark=89 End With Open"c:\student.dat" For random As #1 len=len(student) Write #1,record_n

D．Sub Command1_Click() Dim Student As studtype Dim Record_no As Integer record_no=1 With student .ino=12 .strname="smith" .strsex="男" .smark=89 End With Open"c:\student.dat"For output As #1 len=len(student) Put #1,record_no,

已知文件filel8.txt中的内容是：一共有3行，每行分别是实型的数值1.0，2.1，3.2，则下列程序执行之后，输出的结果是______。 package ch1; import java.io.*; public class exl8 { static String strName = "ch1\\file18.txt"; public static void main(String[] args) { try { FileReader fr = new FileReader(strName); BufferedReader br = new BufferedReader(fr); String str; while((str = br.readLine()) != null) { float f = Float.parseFloat(str); System.out.println(f); } br.close (); fr.close (); } catch(Exception e) { System.out.print (e.getMessage ()); } } }

A．1.0 2.1 3.2

B．1.0

C．2.1 3.2

D．显示异常信息

设在工程中定义了如下类型： Type stutype ino As Integer strname As String*20 strsex As String* 1 smark As Single End Type在窗体上正确使用这个类型的是下列哪个操作( )。

A．Sub Commandl_Click0 Dim student As Stutype With student .ino = 12 . strname = smith .strsex = .smark = 89 End With End Sub

B．Sub Commandl_Click0 Dim student As Stutype With student .ino = 12 .strname = "smith" .strscx = "男" .smark = 89 End With End Sub

C．Sub Commandl_Click0 Dim student As Stutype With Stutype ino = 12 .strname = "smith" .strsex = "男" .smark = 89 End With End Sub

D．Sub Command1 _Click() Dim student As Stutype With student .ino = 12 .strname = "smith" .strsex = "男" .smark = 89 End student End Sub

设在工程中定义了如下类型： Type stutype ino As Integer stmame As String*20 strsex As String*1 smark As Single End Type 在窗体上正确使用这个类型的是下列哪个操作( )。

A．Sub Command1_click() Dimstudent As Stutype With student .ino=12 .strname=smith .strsex=男 .smark=89 End With End Sub

B．Sub Command1_Click() Dim student As Stutype With student .ino=12 .strname="smith" .strsex="男" .smark=89 End With End Sub

C．Sub Command1_Click() Dim student As Stutype With Stutype .ino=12 .strname="smith" .strsex="男" .smark=89 End With End Sub

D．Sub Command1_click() Dim student As Stutype With student .ino=12 .strname="smith" .strsex="男" .smark=89 End student End Sub

下列Applet用于显示提供它的主机的IP地址。请选择正确的语句填入横线处。 import java.awt.*; import java. awt. event.*; import java.applet.Applet; import java.net. *; public class ex23 extends Applet { public void init() { setLayout(new GridLayout(2, 1); Button btm = new Button("显示IP"); final Label 1 = new Label(" "); btn. addActionListener (new ActionListener ( ) { public void actionPerformed(ActionEvent ae) { try { URL ur1 = getCodeBase(); String strName = ur1.getHost(); ______ 1.setText (ia.toString()); } catch (Exception e) { e.printStackTrace (); } } }); add (btn); } }

A．InetAddress ia = URL.getByName(strName);

B．InetAddress ia = InetAddress.getByName(strName);

C．InetAddress ia = new InetAddress.getByName(strName);

D．InetAddress ia = InetAddress.getByName(ur1);