?? ??:“??”??????????????
????:1???????????:???????????
2????????
3??????????
4?????????
5?????v
?????????????????11?????22????????????? ??????22?????????,???????????“????????????????????????”??,???
???,????????????????????????????,?????,21????????????????????“??”?????,??????????????,????????“???????”?,???
?????????????????,“????????”????,???????“????,????????”?“?????????”????????????????????
????????????????????????????,“??”??,????????,?????????????????,???????,?????????,???
?????????,??????????,????????,???,???????????????????????????????,???????????????“??”????????,???????????????????????????????????,?????
???????????????????21???????????????????,??,?????????????????“??”????????????????(??????????) ??????????????????????????:???????