????:1???gzs??:???????

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

3?????????

4?????????

5?????????

??11??????????????????????30????? (??? ?????)?30???,11??????????50%,?????0.2?????,???????????????6????????50%???????????????,?????????????????

??,???????????,????0.3?????0.9?????????????????;???????;???????????????????????

??,11?????????????????????????,??????????50%,??????????????????,??,????60%??,??;????????????????52%???????????????,??????;?????????????55%?????????????????????,??????????????????????,????

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