题目

有如下VB程序段： a(1) = "231": a(2) = "34": a(3) = "23": a(4) = "234": a(5) = "123" For i = 1 To 2     For j = 1 To 5 - i        If a(j) > a(j + 1) Then t = a(j): a(j) = a(j + 1): a(j + 1) = t    Next j    Text1.text=a(j) Next i 执行该程序段后，文本框Text1显示的内容为（    ） A . 34 B . 123 C . 231 D . 234 答案：D

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