（）invented the alternating fields methoD._精华吧

（）invented the alternating fields methoD.

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（）invented the alternating fields methoD.

A.Ban Gu

B.Zhao Guo

C.Fan Shengzhi

D.Lin Zexu

正确答案：Zhao Guo

Tag：英语话农史华夏篇时间：2024-01-04 19:56:32

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1.Rainfall and mountain springs were important sources of water in the mountainous areas.
2.The ever increasing population in South China put great pressure on food and land， which was one of the reasons why terraces came into being.
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