?? ?21??????????????
????:1??????:??????500?4???
2????????
3??????100????
4????????
5?????95???
9?27??????????,?21?????????????????,???????????????????????????????????? ? ????? 9?27?,?21?????????????????,??????????? ????? ??? 9??27?,??????????????21????,?????????????????“???”??????????????“???”???????????????? ?????????????? ? 9?????????????27?,?21??,???????????????????????????????? ????? ?????? 9?27?,???21????,??????????????????? ??? ????? 9??????????27??????,?21????,???????????????????????????????????????? ? ?????????????? 9?27?,???21?????,???????????????? ? ? 9?27?,??????????21??????,?????????????????????? ???? ? ????:???????????????