Khi mọi đứa trẻ đều thông minh!
Cập nhật: 07:50 28/10/2014 GMT+7
Trước đây những cô cậu học trò làm bài kiểm tra lộn xộn, suy luận chưa thật chính xác, không thuộc lời quy tắc, định nghĩa...
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