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

2????????

3??????????

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

5?95???????

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

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

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

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

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