s=""
For i=1 to 3
For j=6 to i+1 step -1
If a(j)<a(j-1) then
t=a(j) :a(j)=a(j-1): a(j-1)=t
End if
Next j
s= str(a(i)) +s
Next i
Text1.text= s
数组元素从a(1)到a(6)的数据依次是“4,2,7,5,1,9”,程序运行后,文本框中显示的内容是( )