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

2??????

3????????

4???????

5?????

?????????9???15??????? (????????????? ??????)???????15?,????????????????“??”????6?????11???,?2???,??20???

??,“?????”?????????13???18????????,???????????????????14??2??????????????????????,“???”??????,???????????????????“?????”?????????,?,???

???????????????,????15??,“???”????3.6??,??1.4?????????????????,??6?????????????,??4????????“?”???,2????????????????????????

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