???????????????????? 2.3??????

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

???12????????18????? (?? ???????????????????)??,??????,?????????????????????????,???????

????11????????????????????,????????,??6.6???,?????????2.3??,????????????????99.5%??,?????????????609.9???????????????????????

?????,??????????????????,30????????????????“??????”???????????????????????????????????????????????,???????????????,??,???????????“????????????”??,???????

??????????,???,???????????????????,?????????,???????,??,????????????????????????????????

????????????????????????,??????,??????????????????5?????«??????»,?????????10??1?????«??????»???????????,??,??????????????,???????,?????????????????????????????(??) ??:??