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 = 2 To 10 Step 3 Sheet1.Cells（i, 1) = 8 * i Select Case Sheet1.Cells（i, 1) Case 0 To 30, 48 Sheet1.Cells（i, 2) = Sheet1.Cells（i, 1) + 10 Case 30 To 60 Sheet1.Cells（i, 2) = Sheet1.Cells（i, 1) + 20 Case Else Sheet1.Cells（i, 2) = Sheet1.Cells（i, 1) - 10 End Select Next i End Sub