光纤的主要特性有（）和（）。

下列程序段的功能为：单击窗体后，在D盘Temp目录下address.txt 文件中输入“张三，20，Male”。请填空。 Private Sub form_ click() Dim name As String Dim age As Integer Dim sex As String name = "张三": age = 20: sex = "Male" Open "D:\temp\Code.txt" For Append As #1 ______ #1, name, age, sex ______ End Sub