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

2??????????????

3????vx

4??????100??????

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

????????????12?????????26?? ????????????????,????????,??????????????16.2??,?????4.7???,??2.5????;??????????????8000?????,??3000???,????2300??????

??,?????????????????43??,???11.7%????????????;?51.8??,?????3%?????,?????????

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