?? ????????? ??????????
????:1?????????????:????????100?200?
2??????????
3???????
4???????????
5?????????
???9????21??????????? (???????? ?? ????????)?????(????)???????????????(?????????????????“????”)??????21??????????????“???? ????????????”??,??????????
9??????21?????????????????,????????????(??)???????????? ? ??“???????,?1.7????????????????7??,???????????5???”???,????“????”?“?”?????????????????,???????????????????????180????
“??????????????????,???????????”???????,????????,????????????,??????????????????????????????????
?,???????????????????,??“??”??????????????????
9??21??????,???????????? ???????????????? ??????????????????????????????,???????????????????????????????,?“?????????????”??
?????,????????“????”“???????”???????????????“??”????????????,?????;“???????????”??“???????”?????????????;????????????????????????????????(?)
???:?????????