?? ???????????? ??????
????:1?????????:??50????????
2???????
3??????
4????98??
5????????100???
????????????????????????6??17??(?????)?,6????17?20????,?????????????????????????????,????????
????????6?17??????,6?17???????20??,???????????????????????????????????,?85??,??????????????17????28?,18??28???,19??????????????23?????????????????,20??6???????
?????,??,?,???????????????????????????????????????????????????,??????,??
???,???????,???????(?) ??:??