????:1???????:???200????

2????????????

3?????

4?????????????

5??????

??7????????????15?? (???????????????? ??????????????????)6???????????15???????,6??????????????,70????????,?????

?,????,6????????????????,????????????0.5%,????0.2???????????0.7%,?????????0.6%,?????????????????0.2??????????????????????

???????,???????????????,??0.4%,???????0.8???????????????????,???????????????????????????????????????,???????0.2%????????????????0.5%???????????0.9%,????????????0.1?????????????????????0.9%,?????

??6???,???????????????????????,??????????????????????????,???

??????,6???????,70??????????,?4??,???????????????????

??,???58?????,????,??????????????????,??“???????”??????????????,6???????????,??????????,?????(??????????????????) ???:???????????????????