根据掌握的田纳西河流域综合开发的知识,分析下列问题
(1)田纳西河流域开发的核心是什么?流域开发的自然背景是怎样的?
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(2)田纳西河综合开发过程中取得了哪些经济效益?
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(3)田纳西河综合开发过程中取得了哪些生态环境效益?
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