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

2?929598?

3???????

4?????????

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

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????????????????,???????????,??????640????????????????,???????????40%,???2.33?????,???????????????????,????????????????

????,??????????,??3.65?????3.18??2.96?1.79???????

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?????“?????”?,???11???3??49??,?“??”????5?????11.5%?

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