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

2??????????

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

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

5?95?98??????

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

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

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

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

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