????:1?????????:???????

2?????v

3??????????

4???????????

5??????

??????????????6????21??? (?????? ???????)21?????????????????,“???? ?????????????”??????????????????,????,?????????????????

?????????(????)???????????,????????????????,?????????????????????,??????,???????????

??????,?????????????,?????,??????????,????????100????????,???1000?????????????????????????,??????1000??????????????????????????????????,??1???????????????????????????

21??????????,“???????? ???????????”????????????? ?????????????????????? ???

????«????????????“??”???????????? ????????????????»???????????????,????????,?????????;??????,?,?;??,??,???,?????????????????????????;??????????,????,????????????;????????????????,???

??????«“?????????????”??????»????????,?“?????????????????????”????,???????,“?????”?“??????”,????“???????????”??????;????;????;?????????,?????????????,??????,????????????????????????,?????????

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

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

?????:???