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1 gen 100 anni a. C. - 记载了用竿标测日影以求日高的方法，最早引用了【西周初年】勾股定理的特例商高定理

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人教版高中历史|Chinese students' PEP SENIOR HIGH HISTORY TEXTBOOKS

29 set 2024

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1 gen 100 anni a. C.

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~ 2127 years ago

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