A、ADOcn.Execute "UPATE FROM SC WHERE 学号 = ’A30’ "
B、ADOcn.Execute "SELECT FROM SC WHERE 学号 = ’A30’ "
C、ADOcn.Execute "DELETE FROM SC WHERE 学号 = ’A30’ "
D、ADOcn.Execute "DROP FROM SC WHERE 学号 = ’A30’ "