????:1?????:????cs

2????????

3??????

4???????

5???????

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

??,???????,???????????60%??????????,????????????????????????,??????

??,???????????????1800????????????????6????????6?,????????????????6???????????????

???,???,??????,?????????????800??

??????????????????????????????????,????????????,??,???????21???????

6??????????15?????????????????,?????????,??,???????????????,???????????,????74?????????85%????????

????????(6?????????16??????????????????)??,??????????417????????,?????????13????????????????,???????,??????? ??????????????????:?????