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

2???????150??

3????????

4????????????

5??????vx

??????11???27? (???????????? ????????????????????)????????????????????27??????????????????,?????????,??????????,????

?????,?????(???????????)??

?20???????????????????????????,??????????????????11?22???????,??70???????????????????,????????????6?????????????????????

??300????????,???8.6%????8.7%??,?????????????????????,???????????(?????????????????) ???:?????????