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。空白处应填入的内容是（）。 Private Type Ang K As Integer Sinx As Single Cosx As Single End Type Private Sub Form_Click（） Dim Y As Single Dim i As Integer Dim Ksc As Ang Open_______ Y=3．14159／180 For i-1 T0 90 KSC．K-i KSC．Sinx=Sin(i*Y) KSC．Cosx=Cos(i+Y) ________ Next i Close#2 Elld Stub

A."．．＼Data1．txt"For RandomAs#1 Len=10 Put#1，i，KSC

B."．．＼Data1．txt"For Random As#1 Len=10 Put#1，Y，KSC

C."．．＼Data1．txt"For Random As#1 Put#1，i，KSC

D."．．＼Data1．txt"For Random As#1 Put#1，Y，KSC