单项选择题
A.Interval B.Value C.Enabled D.Text
A.Public Sub Sum(x,y) B.Public Sub Sum(ByVal x, ByVal y) C.Public Sub Sum(x As Integer,y As Integer) D.Public Sub Sum(x%, y%)
A.建立用户界面 B.编写源程序代码 C.画图 D.显示文字
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