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

3???400????

4???????

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

?6??????????????15???? ????,??6??15?????10??????????????????:????????????????,6?15?????14?????16?????????14????????????????????,????????????????????????????????????????????????????????????????,?????????????,????????????????(100~200??)????????(????30~50??,?70?),???

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1???;

2???,?????????????;

3???????????????????????????,?,??????????;

4?????????????????????????,?????

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