s=Text1.Text: h=1: Max=0
For i=2 to Len(s)
If ① Then
②
If h>Max then Max=h
Else
③
Endif
Next i
Label1.Caption= str(Max)
划线处可选代码为:①h=1②h=0③h=h+1④Mid(s,i,1)=Mid(,j+1,1)⑤Mid(,1)=Mid(s,i-1,1),则①②③处语句依次为: ( )