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

2??????120??????

3?????????

4????????

5?????????

??8??12?? ????,?????8?????12?10???????

????????????????????,8?12????14??????????13???????????14?????????????????,?????????????????????????????????????????????????????,??(100~120???????);????(?????20~50?????????????,?????80?????),?????????????

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1???;

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

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

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

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