??2???4??? (???? ?? ???????????????)“??????,???”???????,???(????????),????????????,????????????????

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

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

???????

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

??,“?,????????????????,??”

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

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

???????,????????????????????2?????2???????????????????,??????42.6?????????????,??4.9??????????????????????(??????)

??????:????????????????????? “??sn??”????

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

????:1???sn??:????????

2???????????

3??????300??

4?????????

5???????

??2???4??? (???? ?? ???????????????)“??????,???”???????,???(????????),????????????,????????????????

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

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

???????

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

??,“?,????????????????,??”

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

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

???????,????????????????????2?????2???????????????????,??????42.6?????????????,??4.9??????????????????????(??????)

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