??a???????ˉ?????????o???è??é¤????é?￡??a??·?ooé??è|?é??é?????è?1?????????
è??è?a?·±??o?o?é??????????aè?????è?|?????????
?|???????????1°??????é?ˉ????????o??°??¨????￥3??????è??????????????é?′???????1??????￥é??è?a?·±??ˉèˉ￥??-è????ˉèˉ￥è?a??2?????????
è§?????2?é?????è?§??????????￡°?????￡???a??????????￠??????????oo???é???o???-??a?°????????1°??°é|???????é?￡?¤???¨é￡???o???????????ˉèˉ′????????￠??????a??
????°?é?|?????????????-????????￡°?????????a????°??¨?￥?????2?é?￡?1??????￠?o????a??
???è?3?ˉ1è????a?????￠?o??o??1′?????·??????????1??2?é?￡?1???±?o????
è?§????????±?o???±??????a????￠???????????￠????????????????1°???????¤???????a??
èˉ′???????°±????μ′??¤?o????
???????????????è????±???????o????é?μé????????
?????????????1°???????¤?????????ˉ?????ˉ?1????è??é?????è?1?????o????????a?????¨è?????è????ˉ????1°????¨??????·????????????
???????????a???????°?è§??o?è????¨è￠??????¨é?|??????????????1è?¨???????o?è?a??2?????????
è?????????-???????????????¨???????????°??1?????′è￠?è?§????????′??￥???è§????
è?????????ˉ1?-??????????????¤§??μ??????????§??????ˉè?a?·±é??????o????
????·±????????￡?°?????????o?????o??????é?¨????o???μèˉ????
a????¨?±?????????????è°???????é￡???°è?a?o??????????è|?é￡?T028è?a?o????a??
????-?é?￡??ˉ?????￥??¨?±????è??????￡°é?3???a??T028è?a?o????è?§??oé????°??¨é￡????C919?????a???????????a???è￥?????????|é?????è?????è?a?o???????????????????é￡?è??è·ˉ?o??°??°????????o¤???????1????é?????è§?é?￠?o???????????????????a??
????′§?′§???????????o???a??????????????a??
?°±?????ˉè??è???-?????1????è§????????1?è|?é?????è?????è?a?o????
??¨?±???1?o???￡?°????a??é?￡?￥?????????????é???o¤??????è?¨??????????￥??·￥????o¤??￥???????o???′??￥???é???±±??o??oé￡?T028???a??
???????o??????????????o￠??¨???a???￥????a??
???????????o??????????????o????????¨??????è?¨???è?¤????-????a???????μ???a???????a?-????