题目内容：

[单选题]（34）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 Dim i As Integer Dim Ksc As Ang Open Y=3.14159/180 For i=1 To 90 Ksc.K=i Ksc.Sinx=Sin(i*Y) Ksc.Cosx=Cos(i*Y) ___________ Next i Close #2 End SubA."‥/Datal.txt"For Random As#1 Len=10 Put#1,i,KscB."‥/Datal.txt"For Random As#1 Len=10 Put#1,Y,Ksc C."‥/Datal.txt"For Random As#1 Put#1,i,KscD."‥/Datal.txt"For Random As#1 Put#1,Y,Ksc