i = 1: j = 9: n = 0
key = Val(Text1.Text)
Do While i<= j
n = n + 1
m = Fix((i + j) / 2)
If key = d(m) Then Exit Do 'Exit Do表示退出循环
If key < d(m) Then j = m - 1 Else i = m + 1
Loop
数组元素d(1)到d(9)的值依次为“7,12,18,25,39,58,61,72,86”。若该程序段运行结束后,n的值为2,则key的值是( )