关于铁代谢描述正确的是

A．主要贮存于肾脏

B．以Fe³⁺形式被吸收

C．转铁蛋白是铁在血浆中的运输形式

D．铁参与细胞色素氧化酶的合成

E．缺铁时血浆转铁蛋白降低

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 Sub

A．"..\Data1.txt"For Random As #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