???“???”???“???”??“???”?

?,??,????,????????“????????????”????

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

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

?????????“??????????”?????2?????????????????8??????????,?????????????????????????,??????????5???????????????

??????????????? ????:??,??,??8????????????????10?????,??,????????????????????????????“???”?

????,??80%??????,????????????“????”????????

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

? ???:????????????????????pH???????,???????????????7?8???????????????????,????,????????

??????????????,??“????????????????”

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

??“??”???,????????????????????????

???,“???”

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

??????? ??:??????,????????????????????,?????????????????,???????

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