竞赛进到AIME &USAMO 不算难，但体育到一定水平挺难的.

来源: Youth 于 2018-12-16 07:53:14 [旧帖] [给我悄悄话] 本文已被阅读：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.

Change Ad Consent