如图所示，是求绝对值的算法，其描述方式分别是（   ）

A．自然语言、流程图

B．伪代码、流程图

C．自然语言、伪代码

D．流程图、自然语言

有如下程序段：
tail = 6：i = 1：r = Val(Text1.Text)
Do While i < r
For j = tail To i + 1 Step -1
If a(j) > a(j - 1) Then
t = a(j): a(j) = a(j - 1): a(j - 1) = t
End If
Next j
i = i + 1
For j = i To tail - 1
If a(j) < a(j + 1) Then
t = a(j): a(j) = a(j + 1): a(j + 1) = t
End If
Next j
tail = tail - 1
Loop
数组元素a(1)到a(6)的值依次为“73、56、28、61、44、92”，若在文本框Text1中输入“2”，则经过该程序段“加工”后，数组元素a(1)到a(6)的值依次为

A．73,61,56,92,44,28	B．92,73,56,61,44,28
C．92,73,61,56,28,44	D．92,73,61,56,44,28

下列可作为变量名的是：

A．3D

B．X_Y

C．X+Y

D．And

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 = "甲乙丙丁戊己庚辛任癸"
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
a =" (i" + 6) Mod 10
b =" (i" + 8) Mod 10
c1 =" Mid(s1," a + 1, 1)
c2 =" Mid(s2," b + 1, 1)
c3 =" Mid(s3," b + 1, 1)
List1.AddItem  + "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 ，“生肖”是 。

（加试题）某VB程序段如下：
s = ""
For i = 1 To 5
a(i) = 0
Next i
For i = 2 To 5
For j = i To 5
If j Mod i = 0 Then a(j) = 1 - a(j)
Next j
Next i
For i = 1 To 5
If a(i) = 1 Then s = s + Str(i)
Next i
Text1.Text = s
运行该程序段后，Text1中显示的内容为

A．2 3 5

B．1 4

C．2 5

D．2 3 4