??!??????????????“????”

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

??9???????????19??? (??? ????????????????)?“??”(Sigma Geography),9?19?????????????????????,“???????”???????,?????????????“????????????”,?????????????

???

??(??)????????????,“???????????????”??????????,???????????????????????????????????,??“?”????????????????????????????“???”“??”“??”“???”????,???????????????????????????

9??19????????????????????,“?????”??????????????????“????????”???????? ??????????????? ??

“???????????”????????????????,“?”?????????,?????????????????4??16??,???320?????????????,???????4???????????????????????????,“???????????????????????”?????????????????????????????????????????????,??31.3%?

“????????????????????”???,??????????????????????,????????????“??”?,?????????,???????????????

“??”????????,?“??????????????????”??????????????????,???“??????????????????????”????????????????????????????????,??????????

“????????????”????????????????????,?????“?????”?????????,????????????????????????????,?????

???

“?????????????”?????????????????????????????,????“?????????????????”???????????????????,????????????“????????”???????,????????????????,?????????????,?????,???

9???????19????????????,“?????????????????”?????????????????????? ??????? ????

????????????,???????“??????????”,?????????????,??????????????????,??????????????????????????,??????????,????????????????????

??,“?????????????????????”?????,????????????,??????????????????????????????,????,???????

????????,“?????????????????”??,??????,??????,????????????

????????,“??”???????????????????????????????????????????????,“??????????????????”?????????????

????

????????????????“???????????????”???,????????“?????????”???“?”???;“?”?????????,???????????“??”,??,“???????????????”?,???????????????,????

“?”?????????,?????????????????,????,????????????????,“????????????????????????????”????«??»?????«??»«???????????»??10???????????

??,?????????????????????????????,“???????????????????????”?????????????????????,??????????;????,???,????????????????????????????????????????

??,?????????????????“??”,???“????”?????????????????,?????????????????,?????????????????????????,?????????????????????????????“????????????????????”???“????????????”“??”??????????????(??)

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