???2???10??(? ????)????“?”??

?,??????2???????????12????????????????????????????????????0.01%?0.1%?0.1%?0.2%?0.3%,???????????9-30??????????

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???2???????15?????????????????????0.15%?0.25%?0.4%?0.6%?1%?????20-58?????????????????????

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??????,?????????????2??10???????,??????650???????????700???????????????(???)

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