第5章（第2页）

?????o?èˉ￥é????￥é???o???§?????￠????|??-¤??????????????a??????????¤???????????1?è????￥????????????

????o??-??-?????-1???????¨??a??a?????o????è￡??o????

?|??????ˉ??￥???????2????é?3??????????????μèˉ?è?????è′¨é???ˉ1??1??o????1?è???1??ˉ1?￥1???

?????o??¨?￥1??????é?????é?¤?o?é???3???￥?¤?????¨??a??a???ˉ?ˉ1?￥1è??è¨????é??è|?????oo???

?????ˉ??°??¨?????????é?????é??è|??o????

?￥1?·2?????3???????o????????o????

??????è???-??-?é??????o????

???????￥1???????1?é?1?????¨????oo???é??????￥1?????ˉé?￡??a????¤§??????èˉ????

?2????é?3?1??2????????¤??¨??a??a?????????ˉ???è????ˉ????￥1????ˉ???????????o??????ˉ???

?è????????????·2???è??è??????￥??o?????????3?????§??-????????????

è???????????????¤????

??????????????????￥???????????ˉ?¤aé????′?o????é?￡???????1????????????￥??????

?2????é?3?????????é???o??????????????????2??????è???-????

?????¤??????????????????????????????????????¤??°±???????o???????

?????????????2????é?3???????????o???

??￠???é???3????????￥1?°?è??é??????????￥????￥1?°±?????¨????￥??o????

?°±?????ˉ?￥1è????a?|1?|1é?????????????°????¤???????