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2??????????

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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???????????????????????????????????,??,?????(????) ??????????????????????:?????????????????