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二年级数学下册《数学好玩》2重复的奥秘课件2北师大版.ppt

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大,小,大,小,大,小,大,小,女,男,女,男,女,男,女,男,1,1,2,1,1,2,每年都有12个月。,我们的属相是每12年重复一次。,衣服上的条纹,简单的重复构成美丽的图案。,

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