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2????????98?

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

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

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???8???????6???????,?????????????????????,?????????????????????????;??????????????????????????????????????????,?????

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6-7?,?????????????,????????????????????????????????,?????,??????

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6??6??????????8??????????7??????????????8??,???????????????????????????????????????????????????????????????????????????????????????,??,?????(50~90????)?????????4~6??(??1)?

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6??7?????08??????????8????????08??,????????????????????????????????????????,?????,???????????????(50~70?)(???????????2)?

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6????????????????8???????8??9????????????????8????,??????????????????,??,??????(50~90?)(?????????????3)?

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