1. (2021·湖州模拟) 有如下 VB 程序段:

i = 6: flag = True

Do While i >= 4 And flag = True

    flag = False

    k = i

    For j = 1 To i - 1

        If a(k) > a(j) Then k = j

    Next j

    If k <> i Then

        t = a(i): a(i) = a(k): a(k) = t

        flag = True

    End If

    i = i - 1

Loop

数组元素a(1)到a(6)的值依次为：“19,6,34,40,13,53”，执行该程序段后，数组元素a(1)到a(6)的值依次为(    )