@????? ???????
??????????????2????????,??????????????????????????
???????????????????2??1??,???,?1.1???????????????????????,?????????????????,??????????,??
???????,??????????2?????????????????1???????????????2?????????????????
2???1???????,??,??????
2??,??????,????????????,??
2??????????10?????????????5???,?,?????????????
?,???,????,????????
???????????????2??????????15?,??????-4.8?????????,2???????????,2??????
?????????????:???????