P20.子过程Plus完成对当前库中"教师表"的工龄字段都加1的操作。 Sub Plus() Dim cn As New ADODB.Connection Dim rs As New ADODB.Recordset Dim fd As ADODB.Field Dim strConnect As String Dim strSQL As String Set cn=CurrentProject.Connection strSQL="Select工龄from教师表" rs.Open strSQL, cn, adOpenDynamic, adLockOptimistic, adCmdText Set fd= rs.Fields("工龄") Do While Not rs.EOF 【】 rs.Update rs.MoveNext Loop rs.Close cn.Close Set rs= Nothing Set cn= Noting End Sub 程序空白处【】应该填写的语句是