观察图标,结合所学知识回答下列问题:

(1)表一说明了什么?表一变化的根本原因归结起来是什么?
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(2)表二说明我国实施怎样的基本经济制度?这一经济制度的基础是什么?
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(3)表二中私营企业贡献率增长最多的原因是什么?
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(4)通过学习,你能够为西宁经济的发展做点什么?
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