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"The Beginning of a New Life in Plants" PPT courseware on the growth and changes of plants
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"Mutation of Organisms" Heredity and Variation of Organisms PPT Courseware 6
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"Social Changes in Industrialized Countries" PPT
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"Mutation of Organisms" Heredity and Variation of Organisms PPT Courseware 5
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"Mutation of Organisms" Heredity and Variation of Organisms PPT Courseware 3
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"Material Changes and Us" Material Changes PPT Courseware
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"Material Changes and Us" Material Changes PPT Download
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"Iron is Rusty" Changes in Matter PPT Courseware 2
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"The Beginning of a New Life in Plants" PPT courseware on the growth and changes of plants
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"The Beginning of a New Life in Plants" Growth Changes of Plants PPT Download
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"Mutation of Organisms" Heredity and Variation of Organisms PPT Courseware 2
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"Mutation of Organisms" Heredity and Variation of Organisms PPT Courseware 5
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"Growing Our Plants" Growth Changes of Plants PPT
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"Mutation of Organisms" Heredity and Variation of Organisms PPT Courseware 4
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"Seeds Become Seedlings" Plant Growth Changes PPT Download
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"Energy in Life" Energy and Life PPT Courseware
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"Energy in Life" Energy and Life PPT Courseware
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"Energy in Life" Energy and Life PPT Courseware
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"Utilization of Chemical Energy" Modern Life and Chemistry PPT Courseware
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"The Process of Biological Evolution" PPT courseware on the evolution of living things
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"Changes in Rice, Starch and Iodine" PPT courseware on changes in substances
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"Changes in Temperature throughout the Year" Changes in the Four Seasons PPT Courseware 3
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"Causes of Biological Evolution" Biological Evolution PPT Courseware
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"Changes in Temperature throughout the Year" Changes in the Four Seasons PPT Courseware 2
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"Changes of Rice, Starch and Iodine" PPT download of changes in substances
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"My Chinese Life" PPT download
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"Live the Wonderful Life" PPT
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"Causes of Biological Evolution" Biological Evolution PPT Courseware
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"The Process of Biological Evolution" PPT courseware on the evolution of living things
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"Causes of Biological Evolution" Biological Evolution PPT Courseware
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"The Process of Biological Evolution" PPT courseware on the evolution of living things
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"Changes of Baking Soda and White Vinegar" Changes of Substances PPT Courseware 2
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"Changes in Temperature throughout the Year" Changes in the Four Seasons PPT Courseware 3
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"Common Salt in Life" Salt Fertilizer PPT Courseware
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