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人类活动对生物圈的影响PPT Free Resources Download
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"Protecting the biosphere is the common obligation of all mankind" PPT download
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"Developing a plan to protect the ecological environment" The impact of human activities on the biosphere PPT courseware
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"A wide variety of animals" Biological Diversity PPT download
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"Developing a plan to protect the ecological environment" The impact of human activities on the biosphere PPT courseware
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"Try to classify living things" PPT courseware for classifying living things according to their characteristics
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"Try to classify living things" PPT courseware for classifying living things according to their characteristics
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"The Role of Animals in the Biosphere" PPT
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"Mammals" PPT courseware on the main groups of animals
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"The Biosphere is the Largest Ecosystem" Understanding the Biosphere PPT Courseware 6
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