下面的程序代码是通过函数求出二个整数型变量a、b中的较大值，其中所定义的函数名是（   ）
Function max(a, b As Integer) As Integer
If a > b Then max = a  Else  max = b
End Function
Private Sub Command1_Click()
Dim a As Integer, b As Integer, s as integer
a =" Val(Text1.Text):" b = Val(Text2.Text)
s =" max(a," b)
Text3.Text = s
End Sub

A．Command1_Click

B．function

C．max

D．max(a, b As Integer)

如第20题图所示的流程图片段：该流程图执行过后，a、b、c的值分别为：（   ）

A．a=21,b=9,c=13	B．a=5,b=8,c=13
C．a="5,b=9,c=14"	D．a=21,b=9,c=14

某Visual Basic程序如下：
Private Sub Command1_Click()
Dim x As Integer, y As Integer ,a As Integer ,b As Integer
X="0"
y=0
For a="1" To 3
x=x+1
For  b="2" to 4
y=y+1
Next b
Next a
Text1.text=str(a)
Text2.text=str(b)
End Sub
单击Command1按钮后，Text1显示    ①   ，Text2显示    ②   。

在Visual Basic中，若a=4，b=3，c=10，则执行完下列语句后，变量c的值为(    )
If a+b>c Then
c=a+1
Else
c=b-1
End If

A．2

B．10

C．5

D．4

编写VB程序，实现如下功能：在文本框Text1中输入某一年份，单击“天干地支与生肖”按钮Command1，在列表框List1中输出该年份开始的12个年份及对应的“天干地支”与“生肖”，运行界面如图所示，程序代码如下。

（1）代码“Private Sub Command1_Click()”中的Click是 。（单选，填字母：

A．对象名/

B．属性名/

C．事件名）

（2）为实现上述功能，请在划线处填入合适的代码。
Private Sub Command1_Click()
Dim a As Integer, b As Integer
Dim i As Integer, n As Integer
Dim c1 As String, s1 As String
Dim c2 As String, s2 As String
Dim c3 As String, s3 As String
List1.Clear
s1 = "甲乙丙丁戊己庚辛壬癸"
s2 = "子丑寅卯辰巳午未申酉戌亥"
s3 = "鼠牛虎兔龙蛇马羊猴鸡狗猪"
n = Val(Text1.Text)
For i =" n" To ①  
a =" (i" + 6) Mod 10
b =" (i" + 8) Mod 12
c1 =" Mid(s1," a + 1, 1)
c2 =" Mid(s2," b + 1, 1)
c3 =" Mid(s3," b + 1, 1)
List1.AddItem     ②  + "年" + c1 + c2 + " " + c3
Next i
End Sub
（3）由上述算法可知，2024年对应的“天干地支”为 。