i = 1

 Do While i <= 6

    t = Int(Rnd * 10) + 1

    If t Mod 2 = i Mod 2 Then a(i) = t : i = i + 1

Loop

For i = 1 To 2

   k = 1

   For j = 1 To 6 - i * 2

     If a(j) * k > a(j + 2) * k Then

       t = a(j) :  a(j) = a(j + 2) :  a(j + 2) = t

     End If

     k = -k

   Next j

Next i

执行该程序段后，数组元素a(1)到a(6)的值可能是（  ）

实现上述功能的VB程序如下，但加框处代码有错，请改正。

Const n = 10

Const maxn = 20

Dim a(1 To n) As Integer, index(1 To n) As Integer, flag(1 To n) As Boolean

Private Sub Form_Load()

Dim i As Integer

Randomize

For i = 1 To n

 flag(i) = False

 a(i) = Int(Rnd() * maxn) + 1

 List1.AddItem Str(a(i))

Next i

End Sub

Private Sub Command1_Click()

Dim i As Integer, j As Integer

Dim k As Integer

For i = 1 To n

 For j = 1 To n

  If flag(j) = False Then k = j: Exit For

 Next j

 For m = k + 1 To n

  If Then k = m     ‘⑴

 Next m

 index(i) = k

 flag(k) = True

Next i

For i = 1 To n

 List2.AddItem      ‘⑵

Next i

End sub

⑴{#blank#}1{#/blank#} ⑵{#blank#}2{#/blank#} 

a数组

b数组

c数组

当窗体Form1加载时，自动产生a、b数组的数据，并分别显示在列表框List1与List2中，单击合并按钮Command1后，在c数组中保存按规则合并后的a、b数组的数据，并显示在列表框List3中。程序截图如下所示：

实现该功能的VB程序如下：

Const m = 5

Const n = 6

Dim a(1 To m) As Integer

Dim b(1 To n) As Integer

Dim c(1 To m + n) As Integer

‘窗体加载时，生成数组a、b中的数据，并按要求排序后显示在列表框中，代码略

Private Sub Command1_Click()

Dim pa As Integer, pb As Integer, pc As Integer, s As Integer, flag As Boolean

pa = m: pb = 1: pc = 1

flag = True

Do While         ①        

    If a(pa) < b(pb) Then

        s = a(pa)

        pa = pa - 1

    Else

        s = b(pb)

        pb = pb + 1

    End If

    c(pc) = s

    If  flag Then

        pc = m + n - pc + 1

    Else

        pc =

    End If

            ②       

Loop

‘处理a、b数组中剩余数据，并在列表框List3中输出数组c，代码略

End Sub

图a

import pandas as pd

df = pd.read_excel("ddsl.xlsx") #读文件中的数据

df= df.drop(["日期"，"订单号"，"单价"，"金额"]，axis=1) #删除列

dfg = df.groupby("    ①    "，as_index= False).sum() #分组求和

dfs =    ②

plt.bar(dfs["菜品"], dfs["份数"])  #绘制柱形图

#设置图表样式，显示图表代码略