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

2????????

3??????????

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

5?????300

????????????????????2????????12????????????? (?????????? ?????)2????12????,?38??????40????

??,??1988?????????????????,38?????,??21???????,??????????????????????320???????????????????????????????,??,????????????1.63?,??

???????????????,???????????????????250???????

???,??????????????,??????400??????,???????????????,??????????????????????????

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