回复：what is the link to the original paper?

来源: panlm_ 于 2012-12-25 10:52:05 [] [旧帖] [给我悄悄话] 阅读数 : (54 bytes)
回答: what is the link to the original paper? 由 墨游 于 2012-12-25 10:25:42

Google world factbook where you can figure out.

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