单项选择题
A.a＜＝5 Or a＞＝3 B.a＞＝3且a＜＝5 C.a＞＝3 And a＜＝5 D.3＜＝a＜＝5
A.5=a+b B.b=a+7 C.b=2*π*r D.2a=b
A.Dim x AsInteger B.Dim x AsInteger，y As Long C.Dim x AsDouble D.Dim x AsSingle，y As Integer