????:1???300???:????

2?sn???????

3????????????

4??????v

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

????8?????????????????19?????????????????????(???? ??????????????? ????????)??19??,18??19??????,??,??????????????????????????,??,????????310.4???

???????? ????

??????????????????,19???21??,????????????,???????????8??????10???????,???????,??;22?,??

?????????,18????????8?19?08?????????????????,????23.8???,??:??310.4????????????????216.8????????????????156????????1??90.3??????????????????????????,?24??6?9?????????

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

???:????