?????2???20??? (???? ????)??????,??????,?109??21?????????????

???????????109??????????????????21??? ???

????,???????????????51.2????????????????????????????????????????????????????????????????????????????????????

??5??????2?,???

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

?????????????????:“??,???????,???????,????????600?????????,??”

????????,????????:“????????????????140?,????????????2?????????????????????????????????,???????????????????????”(?????????)

???????????????:????????????????????? “??????”????

?? (???????)???????:???

????:1???????:????v

2????????

3??????????

4???????

5??????????

?????2???20??? (???? ????)??????,??????,?109??21?????????????

???????????109??????????????????21??? ???

????,???????????????51.2????????????????????????????????????????????????????????????????????????????????????

??5??????2?,???

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

?????????????????:“??,???????,???????,????????600?????????,??”

????????,????????:“????????????????140?,????????????2?????????????????????????????????,???????????????????????”(?????????)

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