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F2為學一首示子姪_1

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By: t2011, Views: 930

Energy Technology and the Environment Theme 1　The Influence of Energy Technology 1　Energy problems and sustainable development The process of humans' exploitation and use of energy resources

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LS - Environmental problems and sustainable development

By: t2011, Views: 742

Environmental problems and sustainable development

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By: t1904, Views: 565

form1_1A_4.1B

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form1_1A_4.2B

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form1_1A_5.1B

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form1_1A_5.2B

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form1_1A_5.3B

By: t1904, Views: 543

form1_1A_5.3B

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form1_1A_6.1B

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form1_1A_6.1B

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