1. (2019高二上·武义月考) 有如下VB程序段：

Dim i As Integer，c As String，s As String，t As String

s＝“China2014IT”：t＝“”

For i＝1 To Len(s)

    c＝Mid(s，i，1)

    If c＞＝“a” And c＜＝“z” Then t＝t＋c

Next i

Label1.Caption＝t

该程序段运行后，标签Label1中显示的内容是(    )