在Excel工作簿中,执行下列代码后,Sheet1工作表B8单元格的值是( )。Sub 分段()For i=1 To 10Sheet1.Cells(i,1)=8*iIf Sheet1.Cells(i,1)<30 ThenSheet1.Cells(i,2)=Sheet1.Cells(i,1)+10ElseIf Sheet1.Cells(i,1)<70 ThenSheet1.Cells(i,2)=Sheet1.Cells(i,1)+20ElseSheet1.Cells(i,2)=Sheet1.Cells(i,1)-10End IfNext iEnd Sub