?? ?????“????”?????????????
????:1?????:???????
2????????
3??????????
4??????????
5????????
??????9??16?????? (?????????? ??)“??”“??????”“???”……????????,??????,??,??,“??”?????,????,????“??”???????
????????????“??”? ?????????? ???????????????“???”“??????”“????”??“??????????????????????”?????????“???,??????,???????,???????????????”????????
??«?????»??????????,????????100???????????100????0.5????????????????????????
“??????‘??????’?????????,??????????????”????,???,???????,???????????????????,???????????????,???
“??????????‘??????????’‘???????’??????”?????????,???“????”??????,??“????”???????,?,???,??,?????????????????,????????,??????
«??????»???????,?????????????50?,?????????25???????????,?????????????????????????,????????,?,??????“????”?,?,?????1/4?????????????1/8???,????????,?????????????????,????????????????,???????????????????????????,????????????,???(??)
???:?????????????