????:1?????:??90???????

2??????

3????????400?4???

4??????

5??????????

??????12???19???? ??????????,??????,???????,????????????????????????????????????10?,????12~15???????????????;?????????????????,????????????0???????????????????????????????,???????

??,????,?????????????????????????????????????????????????????????,????????????????????????????????3~4??????0???,?,?????????,??????????

????????:??

???19-21??,??????????????,?,????????????????????4~6?,???????2~4?,??,???????????????????6~8?,??10??????????????????????4~5??,???6~8?????

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