单选题 要将“职工管理．accdb”文件“职工情况”表中女职工的“退休年限”延长5年，程序【】处应填写的是( )。 Sub AgePlus() Dim cn As New ADODB．Connection'连接对象 Dim rs As New ADODB．Recordset'记录集对象 Dim fd As ADODB．Field'字段对象 Dim strConnect As String'连接字符串 Dim strSQL As String’查询字符串 Set cn=CurrentProject．Connection strSQL=''Select退休年限from职工情况where性别='女''' rs．Open strSQL，cn，adOpenDynamic，adLockOptimistic，adCmdText Set fd=rs．Fields(''退休年限'') Do While Not rs．EOF fd=fd+5 【 】 rs．MoveNext Loop rS．Close cn．Close Set rs=Nothing Set cn=Nothing End Sub