?? ????“????????”??????

????:1???????????:??????
2?????????
3?????
4?????????
5????????
??????2?????????21???????????????? (??????????????? ?)?????????,??,???????????21?????????,????????,??????????,????,???????????“???”??,???????????

????????????????2???????????????????H????????,??????????????“?”????????????“?????”????????????????????????,?????????????????????????????????????????,??????????????,?“?????????”??????????????????????????????????????,????????????????????????
????????,??????,???“??”??????,???????????????????????,??1???????????,???????????????????360°?????????????????????????????,????,?,????????????
????????????,“????”??????,??????,???????,??????????????????(????)
