第2章（第1页）

??????¨?ooè′??-?????o????é￠??2??μ??|????????°?????￡¨????￥??????1????????°è￠?é?????????????????è?|é???1??2?????????????è?3è????¨??§??-??????

?????????°???????ooé????′???é??è°|?3?è?????????¤??¤?é?????è????????????????????è??è?2????′???????è?3??ˉ?°±è???????ˉ?o???o?￥???a????1???ˉ???è￠????????2??￥?????????a?????￥???????????a???é????????

???????è????a????-?????ˉ????????°?è??????????°è???o??oo?????±?????a??????è￠?????|?????1′??????????1?????????????????????????

?é??è???′2???????????±??????????o????è???o??oo?????????????????????è??????¤±???。。。。。。???

????-??-??????￥?′§??????????????±?????2???è??è??é??????????¨??????é?±??￡?o?è???μ·é?????é-???????

??a??ˉ?????￡???é??é??????????′??ˉ????1??1??????￡????o????

??°é?????????????￡?oo????°±????¤??o???????è??è??????-???????

???è§????????°±??-??-??????è????￥é???￥??????a???è????-?????a?ˉ1????2???2é?a????oo???

??2??°??§?????o??°???·è????¨?????￥????°±??????????ˉ?èμ???????èˉ′???????????′??¨??°??o?-?????????′??°?-???°?????o?-￠??????

?2???2é?a??1?o???1?¤′????ˉ??????1è±????è??èo???????????????ˉ??3èμ·????1??????·????????????????o??o?è???-???????

?è???′2??????????????￥????￥??￥??????ˉ????????1?¤??????￥????????????

èˉ′????￥1?????￥??????????|?????????a?????￡?ooé?￡??￥????±??????|???è??è§???????è?±?￡°??¨?￥1èo???????èμ·????￥1é???2???????????????????

??¤§?°???·???éo???|??????è·¨??????è????a????????§???è????ˉ?¤??oo??1????o¤??￡????????????????????|?°???|??°?o????é????????

??¤??ooè???1???ˉ??o?o?????￥????èˉ·?¤§?°???·????????￥?￥??-1????ˉ1?o????è????·èˉ′?o??????￥????¤§?°???·?°±?￥??￥??????¨???é??????1±??o????o????????????¨?¤???￠?oo??°??????è′￥????o?é?????????￡°??????

??|?°??????￠?oo??°??????

é??é??é??è°|?3???¨?¤?é??????1±??§??o?￥????è???°??￥3?°±?????ˉ??￠?oo??°???????°±?????ˉè′￥???????￡°?o???????

????????ˉ????????????????o??????????????1??°±??|?°??o???￠???

???è?????????·2?1???ˉ?o??????????????o|??????é???2??????????????1??2??????2?????????é??é????°è·¨è?????????????????èμ°è??è????aè??????????°?????????????a???ˉ?????°?????¤???

??¤§?°???·??????????????°??1è???o??1′?????′??o???????????￠??????èˉ′????oo????o?????°±è????????è???o???￡?ooé???2?è?????è????????

?è????·????¤??oo?2????????????°??????é?′????????￥?¤§?°???·?°±??§??-??¨è????a????o??o??1′?????°?????¤?a??????§??????