?? ????70??????“???” ???????????????
????:1??????????????:???????
2?????vx
3??????
4??????
5??????????????
???????:??????????????“???”?????????????????????????????????????????,???????????????????????????????????,??????70???????????“????”????,??????????????,?????????????“???”????????
??5??,????“????”?????????????,????????????????400????“????????”????????????????,?????????????????????“??”????????????????????????????????????,???????????“????”,??????????
??????????????,???????“????????????????????”??????????????2.0?????4?????????,??“?????????”??,???????2000????,????,???????“????”?????,??????????21??2780?????
????,??????????????????????????????????????????70????,????????????“??”?????,????????????????????????????????,????“?????????????”????????????????,??“??????”?????????
????????:???? ???????????? ????????
??????????????????,???????????70???“??????????????”?????????????????,???????????????????“????????????”???????????
????????,????“????”????:????,??????,??,?????????????????,????,?????
?????????????,???????,?????
????????????,???????????????????,????????????????????????????????????????“???????????”???,????????????????????????,????????“??????”?????,???????????
????:?????????? ?????????“????”
???????????????????,????“???????”????????????????????????,?,????????????????,????????
?????,???,??????????????????????,?????“??”?????,????8????,??????????????????????10???????????????????????????????????????,???????120?????????140??????????,???????????????????70%,??????????,??????????????????,?????????????????????210????,???
????????????????:“???????????????????90????????????,????????????,???????,??????90????,?????????,?????????”
??,????“????”?????????????????,????????5??,???????????
??,?????“????????????”??????????????
?????????:“????,?????????????????????,????,????????????????????????,??,???????????????????,??????????”
“????????????”??????????????????
????“????”???????????????????????,??????????
??????,????“????”????,?????,??,??????????,??
??????????:“?????????????‘?????????????????’????????????,??,???????,???,?????????????????,??,?????” ?????:?????