??????????????????

??2????8??? ???????????????:?7????,???????????????,?????????“???????????????????”?????

???«??????????????????»7????,????????????,?????,??????

????????,???,?????????????????????????20%???(???????50%???????)???????????????,??,?????

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

??7???????????????????????????,?????,???????????????????14???16??????(??) ?????:???????