Sub 第一题()
Dim rng As Range
For Each rng In Selection
If VBA.IsNumeric(rng) And rng > 0 Then
rng = "正数"
End If
Next
End Sub
Sub 第二题()
Dim i%, rng As Range
For i = 1 To 12
If Application.Sum(Range("a" & i).Resize(1, 3)) > 0 Then
If rng Is Nothing Then Set rng = Range("a" & i)
Set rng = Union(rng, Range("a" & i))
End If
Next
rng.EntireRow.Select
End Sub