????:1???????:????vx

2???????????

3??????

4?????t???

5??????????

???2??5??? (?)?????????????????5???????????????,1?28????2????4?,???597.79?????????????,?74.73??????????,??(??,??)?8.23%?

1?????28???,????????????? ??????????

????????????,???????,????????????

??,1?28?2??4??,??3479.34???????????,???6.23%??????????????,???????????????

1??????????28?2???4???????????????,??1668.71??,????208.59?,?1.17%?

?,?,?????????????????????????,???(????????????)

????:????