??2???????21???? (?????????????????)??????????????21??????,??,?????????????????,?????,???“??”????????????????,?????????

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

???,????????????????????????,????????,??16??????????????,????????23???????????????,?????????13?????????35???????????????45??????,????????????50%?

????,?????????????????,??????????;????????????????????????,?????????????????????????,???????????????????1??????????????,???(?????????) ???:???????????

??

??:???????????,??????????,??????????????