????????“??????”????

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

??2????????H?????????????????????,???????????“???????????????”??“??????????????”?????,???????????????????????????????????,???????????????????????????,?????????“????”????????????????????????,?????????

?,????????,??????????“???????????”????,?????????????????????,????????1???????????,????????????360°?????????????????????????????????,???,???????,?????????????????????

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