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5??????150????
??7??????22?? (??? ?????????)7?22??????,??“?????????????”????????????????????,???????????????????????,?????????????????,???????,??????????,???
?????????????????????,??????????7600?????,??????????????????????,???????????5500??????47%,???????45%,???????,??
?????,?????????7???????????14?18???????????,?????????????????,???????????????????????,?????????????????????,????????????????????????7??????16??????????????????????,?????????????
??????7??????????????????20?????????????????????9??0-50cm?????????:?????,?????????????????76%???,??????????????????????????????????????????,??????,????,??????,???????????
????,?????????“????2000???????,??200????,????,???????????????????,???????????”???????????,?????????????,???????,???????????????????,???????,?????????????“????????”,“?????????,?????????????????”?
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???????????????????????,???????????????,????????????,?????????????????????????????,????????,?????????????????????????;???????????????????????????????????????,????????70%??,??
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