题目

某VB 程序段如下： Dim a(1 To 5) As Integer, i As Integer a(1) = 1: a(2) = 1 For i = 3 To 5     a(i) = a(i - 1) + a(i - 2) Next i Text1 Text = Str(a(i - 1)) 该程序段运行后，文本框Text1中显示的内容是（     ） A . 2 B . 3 C . 5 D . 8 答案：C

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