下列事件过程的功能是：建立一个名为Data1的随机文件，存放角度值及这些角度的正弦函数值和余弦函数值，角度为1，2，3，…，90。请在空白处填入适当的内容，将程序补充完整。
Private Type Ang
K As Integer
Sinx As Single
Cosx As Single
End Type
Dim Ksc As Ang
Private Sub Form_Click()
Dim Y As Single
Open“C:\Data1.txt”For Random As#2 Len=10
Y=3.14159/180
For i=1 To 90
Ksc.K=i
Ksc.Sinx:Sin(i*Y)
Ksc.Cosx:Cos(i*Y)
(15)
Next
Close#2
End Sub

西藏的罗布林卡的最大特点是什么？