????:1??????????????:????vx

2???????

3?????

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

5?????????

???9????????25?????????(???????????????????? ??) 9????????????????????25??,??????????????????,?8???????????????,?????????????54.5??????,???????????

??,??? ? ??????????????

“?‘?????????’?????????‘???’???????????,?????????”?,????????????????????????????????????,??4???,?????????????????????,???21%?

????????????????????,??,??,??????????????

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

?????????????,??????????,???“??????????+??????????????”“????????????+???”????????,???“???????????”?,??,????????(????????????)

????????????????:???