????????7?????,????6??????30????????????????15???????????????

????15??,???,???????????????,???????????????????????,??3??????????1.5???

????????,?????????????????“??????????????????”??“?????????”??,???2??30????,??????????????????

(?? ?? ??? ?)

???????:????????

??“????”????

?? ????????

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

2???????

3??????????

4??????

5???????????

????????7?????,????6??????30????????????????15???????????????

????15??,???,???????????????,???????????????????????,??3??????????1.5???

????????,?????????????????“??????????????????”??“?????????”??,???2??30????,??????????????????

(?? ?? ??? ?)

???????:????????