信欣茗數學園地

高、國中、國小數學國中小教甄(數學) 健康資訊宗教哲學

「知人者智，自知者明；勝人者有力，自勝者強；
知足者富，強行者有志；不失其所者久，死而不亡者壽。」

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2020-09-11 08:28:00
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