大家测试一个有趣的现象，double型反而没有single型精确？？？
[code=SQL]
Private Sub Command1_Click()
    Dim a As Double
    Dim b As Single
    a = 89.13!
    b = 89.13!
    Debug.Print "a --- " & a
    Debug.Print "b --- " & b
End Sub
'
'a ---89.129997253418
'b ---89.13
[/code]
我不解的是为什么，single反而比double精确度高，怪。