??????12??????????????20? (?????????????? ?)???????20?????????????,??????,???,??????????????????,?????????4.8???????????????,???

12??????20????????????????????,??????????????????

“???????????????,?,?????1000??(???????????,????)?????400???????????”???????,????,????????????3.76??????????,????????130?????????16???,?????143???????????????,????173????????????????,???

???????????????????,?????????????(???????????????),??????????????????????????????????????????????????“??????????????????”?????????????,?“???”??“???????????123?????????????,???????????????????????”

????????,??????????7????????????????,????4??????????,?????“??????????6-8????????????,?????,?,?????????”??,???????83???????????,??

????????????,??????????????????????,??,???????????????????????,??????????5????????,???700????????,????????????15????,???????????????????

“?????????????,?????????,??,??????”??,?????????????,???????,????,???????,???,???????????????????????????????????????4????(?????????????)

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

?? ?????4.8??? ???????

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

2???????

3?xc8??1xc

4?400??3???????

5?????

??????12??????????????20? (?????????????? ?)???????20?????????????,??????,???,??????????????????,?????????4.8???????????????,???

12??????20????????????????????,??????????????????

“???????????????,?,?????1000??(???????????,????)?????400???????????”???????,????,????????????3.76??????????,????????130?????????16???,?????143???????????????,????173????????????????,???

???????????????????,?????????????(???????????????),??????????????????????????????????????????????????“??????????????????”?????????????,?“???”??“???????????123?????????????,???????????????????????”

????????,??????????7????????????????,????4??????????,?????“??????????6-8????????????,?????,?,?????????”??,???????83???????????,??

????????????,??????????????????????,??,???????????????????????,??????????5????????,???700????????,????????????15????,???????????????????

“?????????????,?????????,??,??????”??,?????????????,???????,????,???????,???,???????????????????????????????????????4????(?????????????)

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