????:1????????????:????200??vx????

2??????

3????????

4???????

5?????????????

6????????????????????26?????,???????????

??????????????190.65??????????????????,?8.75???,????600??????????????????????,?????????,??????????P2????,??????????????????????????????,???,????????????????????1400??????,???????????????????????????????

?????,?“2+3+N”??,????????????(????? ??????? ????????????)

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