select distinct cno
from   sending,nmtable
       where sending.nmno=nmtable.nmno and nmtable.title='人民日?qǐng)?bào)'
       group by cno
       having count(distinct issue)=(select count(distinct issue)
                                   from sending,nmtable
                                   where sending.nmno=nmtable.nmno and nmtable.title='人民日?qǐng)?bào)')