谜语：What is in the middle of the world?
答案是：the letter “r”
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谜语：What is in the middle of the world?
答案是：the letter “r”
更多数学谜语敬请关注，小编为大家精心收集了最新最全的数学谜语,数学谜语内容,希望同学们喜欢。
本文标题：What is in the middle of the world?
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