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

2??????v

3????????

4?????????

5?????????

?????????2?????????????????????7????????(????????????????? ?????? ?)???,????????????(???????)???????????,????????????,?????30??,??????????????40??????(????????????????)????

?????????2??,60????,????????,????40???

??,?????,??,?????????????,???????????

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

?????????????,??????????????,??????????????,??????,??????,?????

???????????,??????,????????????????????????,??????????????,???

????????,????????,????????????,?????????

????????,????????,???????,?14???????????,??????????

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

???,??,??????????????????,??,??,???????????16?????????(????????????????)

???????????????:????????????