????:1????????:????

2??????????

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

4???????????

5?????????

???6????19???????????????? (???????? ???????????????????)??,?????????????????

19??,???????3.46????(?????????????????,????????)?,??????

??????????,???????????????????????????????????????(??)2.13??,???,????;??????????????????????????????????(???)0.69??????????,????????????????,??,?????????????,??;????????????????????0.64??,??,??????????????

?,??4.43???,???

????????????,??????????????????4.43??????,????????????????????????????????????????????????????????????????????????????7?????????????????,???????????????????????????????????????,?,????,???(???????) ???:?????