?? ?????????????
????:1??????:?????
2??????V
3???????
4???????????
5??????????
??6??19?? (???? ??)??,?????????????
19?,?????3.46??(????????????????,??)??????????,???????????
?????????????????,??????????????????????????????????????????????????(???)2.13??,??,????????????????;???????????????????????(????)0.69?????,???????????????????,???,??????????????????????????????,???????????????;????????????????0.64??????????,???????????????,???????
??,????4.43??,???
????????????????????????,??????4.43????,??????????????????????????????????????????????????????????????7??,??????????????????????????,??,??????????,??????????????(??) ?????????????:?????