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有关于奇偶数的，孩子上课正学到，全当复习巩固了。

four-hour day leaves plenty of time to play and learn, to jump and run, and finally, time to cuddle up in the blankets and dream. Easy-to-read digital and analogue clock faces on every page will help very young readers grasp the skill of telling time as they follow a boy through

数学启蒙原版书不错

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