????????ˉ?o?????£°???
?°????????????μèˉ????????????????è????¨????????????è??è???2????é?£?1?é????????
a?|a?|
?°??°????é?¢???
?°??°?è¨?é????°???é?¢???????°±è|??′§??¥è??AB???è???????????????????????????o???1?¤§?o¤é???o???????AB???è???o??????¥a?|a?|
?°?????????????é???????ˉAB???è???????¨è?|?′§??¥è°???¨???èˉ??????ˉè??è|??-????1??a?°????????°??°?è¨?è?????????·2????¤′??????é??????????ˉè???????????????o????
?°?????????3??3??????a??è°???¨??′?????o???a??
a???????ˉAB??????a??
èˉ?é?3è?????é?¨??£èμ°è????¥????oo????????ˉ????oo????????ˉè′o?-£?£????
???????ooé???±??????????????????oé????¥é??è?????è′o??????è·??°??????ˉ??????é???????????????????¢èˉ′èˉ??????′?????¢?-??o?a?|a?|
??????????°????è???£°èˉ′???a??????¤????è?????a??
è′o?-£?£?????1′????£????èo??????¥?o·????????′??¥?????o500?ˉ????è???μ?????????o?????¤?£??°±???èμ°????°??°?è¨?è??????o?a?|a?|
è??500?ˉ????è????????????°¤??????è′μ???
é?????????|????è′o?-£?£???????è¢??-?èμ·èo???????é??é????°???????°????a?|a?|
?°?????o|??ˉ???
è?ˉ?1????è′o?-£?£?è??é?????a???°??????????è°?è°???§???a??
è??é???°??¤′???????????o???
?°????è·?è′o?-£?£??1?è??????????????????o???????è§?é?£?1??1??????′??°????¤?????????????????-£????13?°??????°èˉ′????????¥èˉ?a?|a?|
è′o?-£?£?????°?????????????è?????????????′??1????o??????1??????é????¥????????¥?????????????£°é?3???????o?è?|??????a???°???????èˉ′??ˉ???????°±è?????è?a?·±?1??????′??¥??o????°?????¤???ˉ??????????o2???a??
?°???????????????3???
è′o?-£?£?èˉ-?°?è?????è?|??????a?????è?°???????°?????????????????ˉ???¨é?????è????¥??????????????????è??????1°????o??????·é??????????????é?£?1??????±??°???????°??£?a?|a?|?????¥???????????????????o?????o2?????????é???????±????????¨??????a??
?°?????£°é?3颤??????a??é??é???????ˉ???a??