Key = Val(Text1.Text):s = 0: i = 1: j = 7
Do While i <= j
m = (i + j) \ 2
s = s + m
If a(m) > Key Then j = m - 1 Else i = m + 1
Loop
Text2.Text = Str(s)
数组元素a(1)到a(7)的值依次为“12,15,18,20,20,20,29”,在文本框Text1中输入待查数,执行该程序段后,则文本框 Text2 中显示的内容不可能的是( )