“北京是中共中央、全国人大常委会和国务院所在地，全国政协、最高人民法院、最高人民检察院也在北京。中央和国务院各部委、各人民团体的中央机构都在北京办公，与我国建立了外交关系的各个国家，都在北京设立了驻华使馆机构。”这段话充分说明北京城市职能之一是（　　）

   Jack went to a barber’s shop and had his hair cut, but when he came out, he was not  h____  with the result. When his friend Bob saw him, he  l____  and said, “What happened to your hair, Jack?”
   Jack said, “I tried a new barber’s shop today, because I wasn’t quite satisfied with the  o____  one, but this one seems even w____ .”
   Bob agreed. “Yes. I think you are right, Jack. Now I’ll tell you  w____  to do when you go into a barber’s shop  n____  time. Look at the barber’s hair, find out whose hair  l____  worst, and then go straight to him.”
   “Why shall I go to him?” Jack asked, “But that would be foolish.”
   “Oh, no, it wouldn’t.” said Bob. “Who cut that man’s  h____ ? Just think it over. He couldn’t cut it   h____ , could he? One of the  o____  barbers cut it. So you know he can’t be the worst barber.”