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

2???????100?????

3???????

4????????

5?????????

?????????2?????12??(?????????????????????? ???)????????????12???,????????????????????,?,?????????,????????????,?20%?

2??12???????????????????,???????????????????????????? ?????

?,???????????,?15%?

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

????2????????5????????????,??(????????)

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