s = "2019.06 Visual Basic 6.0": n = 0 For i = 1 To Len(s)

    ch = Mid(s, i, 1)

    If ch >= "0" And ch <= "9" Then

        m = Asc(ch) - Asc("0") + 1

        a(m) = a(m) + 1

    End If

 Next i

 For i = 1 To 10

    If a(i) > 1 Then n = n + i

 Next i

数组 a 各元素的初始值都为0，执行该程序段后，则变量n的值为（  ）

from random import random

a=[1]*5

i=1

while i<=4:

    a[i]=int(random()*10)+1

    if a[i]==a[i-1]//2 or a[i]==a[i-1]*2:

        i+=1

执行该程序段后，数组a的值可能是（   ）

item={"竞技类":["铁人三项","电子竞技","霹雳舞"],"球类":["足球","篮球","乒乓球"],

"对抗性":["拳击","跆拳道","卡巴迪","击剑"],"水上":["跳水","龙舟","帆船"]}

print(item["对抗性"][2][::-1])

执行该程序段后，输出的结果是（     ）