第5章（第3页）

?￥1???????????·?-????è??è????3?????3èμ·?o??1′è?????è?a?·±???

?????ˉè????????è????2?o???????????1????é￠??¤′???a?????é?1???a??

è????3???è?????????????￡?o???￡???

è???1??o2?ˉ??????¨???a?|a?|???????????3?3????è???1??￥???????

???????1???￥è???????ˉè???????¨???????????±???èμ°?o???????

??¤?oo?1?è???|???????

è????3??????????????????è????±????????-?????????è?|??????

èo????é??éo????????????¨?￥1??????????o???a?????????a???????????????o?????2??ooè???????°????????????a??

è????3???????o?????????°???????????????a??????1??????????a??

é??éo?????????????a????a??ˉ??3???é??è???°??§???????è|???¨????￡μ??????????-????a??

a???￥???·?oo?¤??????ˉ????????????????????¨????|??1??¤?èo???????a??

????|??1??¤????

è????3?????????é?′?|??????°?a???????????1??????ˉè￠???μ??????èˉ′?????oèˉ????

?￥1????′§?o???????a???????????????????3èˉ′????1?a?|a?|a??

é??éo?????????????????o????????1????a?????????￥1?????3??????a??

è????3???????o?è??????????aè§????????1???3??????????????????a??a??

????????′?′????é???????¨é?3??????é?aé?a?????????