????:1???????????:??????

2??????????vx

3???sn??

4???1960????

5????????????

????????????????????8????????10???????? (??)“????????,????”9???,?????????????????????????????,????????????,?????????????????,??????????????????,????????,????????????

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

8???????????????????9?????????,???????????,?????????????? ??????? ????? ????????????

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

?????????????????,“??+????????”???????????????,????????????????,?????????,?????,?????????9?,????????????????????80%?????????????????????,?????????

9?????????????????,??????????,?????61??????????????????????,???????????????,???????????,????????????,?????????,??????????

8????9???,??61??,??? ????????????????? ????? ??????????

?????,??“?????????????????????”????????,???????,??,?????????10%,?????????????????????

?????????????9????????????,??,???????????????“??”????????“????????,??”????????????????,??,??????????????,??“???????????”,??2???

8??????????????????9???????????,?? ?????? ?? ??

???,?????????????:“???,???,?????,???”

“???????????,?????????????????????????????????????????”????????????????,??7???,??????????????,25??????????35????????,??172%???????????????,??????????????????????????????????????????????????

???????????????????????????,?????,??????????????????????????????????????“???”?????????????????,???????????“???????????+??”?????????????????,?“?????????????”???????(?????)

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