a???§????????????????解é??a?|a?|a??
??′???????§??????·???????£°???a?????????????¤?????ˉè??é?????a??
a???¥1???è?ˉ??3?-??o????????-??-????è????????????3????????¨???o?????|?????¥????-¢???è?ˉ?????¢????o?é???-?è?ˉ???a??
a??è???????¢??????????????????è°??-¢???è?ˉ???????????ˉ????-|??ˉ?-????????????????è?′?oo?????a????ˉ?è?ˉ?????????é????ˉ?????¥???è????????é???oo??|????oo??£???a??
a???????ˉ???a?|a?|a??
é??é?3è¨????????????a??¨??1???????????¨?°???¨èo?????°?è??????21é?¨???a???§????????????????解é???????????è§?é?¢è§£é??a?|a?|a??
???????§??????1????·2?????????è????????èˉ????è?aé??è?a??¢??????a??é??é?3è¨?????|??????ˉ??¥?????¥????????????????1′???è¢????????-???????è?°????????ˉ???????????¤é???-???????a?|a?|a??
a?????????§?????????·é???????1??????é??????°±??°?o?????-???????a??
é??é?3è¨??·2???????21é?¨è????°?o????è?|?£°è?°é?£???
100??????
160??????
200??????
è?|è??é£????è??é??è??????1′???é?£??a?2?????????§???????-?è·ˉ??£???
è?????????????????????????o??¥???é??é?3è¨????????????????è???????¥???a??a??
è?°???????????????é??é????±è¢?é??é?3è¨????é£????
?????-???è??éa¤???é?o??£????????a???è??????????o???è??è?|??????è????¨??1????????????
é?£?????o?±??1?è???o???????????¤o?-£??¨é??èˉ???-a?|a?|
???é?¢?¤??3¨a??a??
è????????é??é?3è¨???????