????:1??????100??????:??????

2???95?

3?????vx

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

5??????????

???????2?????3???????????????????????? ???:?????????????3???,???,??????

??????????,?????????????????86.82%????????????,??????????????,???????????3.21%;??????????,???????????2.02%;??????,??1.86%;????,????1.74%?????????690.4??????,???????????591.6??,??????85.69%?

???,??????4.4??486?????

????,????????3??????????????????????,??????????????????????????

1???????????26????????????????????????,????????,?5?????????????????(?) ?????????:???????????????????????????