????:1???????:??????

2?????

3???150?????

4??????

5?????????????

?????????????????????7???4??????(????????????????????? ? ??)?“city??????city???????”“?city??????????????”?,?????????????????4??,???????????????,????????????

?????,????????“city?city??????”“???city?”???????,???????????????????????

“?????????????,??????????????”??????????????

?????,??????,??????????????5?????????,????????????1200?,?700???;???????,???57%?

“?,??????????????,????????????!”????(???) ????:??