A.Private Sub Command2_Click( ) CommonDialog1.DialogTitle=“宇宙大爆炸” CommonDialog1.ShowOpen End Sub B.Private Sub Command2_Click( ) CommonDialog1.DialoTitle=“宇宙大爆炸” CommonDialog1.ShowFont End Sub C.Private Sub Command2_Click( ) CommonDialog1.DilogTitle=“宇宙大爆炸” CommonDialog1.Show End Sub D.Private Sub Command2_Click( ) CommonDialog1.DialogTitle=“宇宙大爆炸” CommonDialog1.ShowColor End Sub