??1.7???????? ???????????2.6???

????:????90????????:????????

??????????,??1.7??,??6.3??????????1??10??,??????????????????????????????????????????????????????????2.6??

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

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

???????????,??????“??”?,??1000????????????,??????,???“??????????????????????????????????????”????????,????

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

????????????????????? ??:?????????28.6????,??????????????????700????????????????,??8500????,?12?????????????(?) ???:???????