单选题 子过程Plus完成对当前库中“教师表”的年龄字段都加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=CurrentProj ect．Connection strSQL="Select 年龄 from教师表" rs．Open strSQL，ca，adOpenDynamic，adLockOptimistic，adCmdText Set fd=rs．Fields("年龄") Do While Not rs．EOF fd=fd+1 rs．Opdate [] Loop rs．Close ca．Close Set rs=Nothing Set cn=Nothing End Sub 程序空白处应该填写的语句是