?????????????2???????????15????????? ??,?15?,????????????6.4????,?????????????

??????????????,?????15??????????????4?48???,?????????????-???????????????????(??????????????????49.92?,????????????????????88.28?)??????6.4?????,????

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

????,????????,???????????????????? ???:???? ??“????????”

?? ???????????6.4????????????

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

2?????????

3????????92?

4?????????

5???????

?????????????2???????????15????????? ??,?15?,????????????6.4????,?????????????

??????????????,?????15??????????????4?48???,?????????????-???????????????????(??????????????????49.92?,????????????????????88.28?)??????6.4?????,????

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

????,????????,???????????????????? ???:????