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Physics Chapter 7
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acoustics
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Basic deduction of force
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Electricity and Magnetism
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Measurement and mechanical movements
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Salt
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material composition
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Substance classification
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Carbon and carbon compounds
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acids and bases
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water
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solution concentration
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solubility
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Air
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earth movement
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Metal resources
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Metal materials and alloys
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Chemistry and life
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earth movement
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Summary of Several Quantifiers in English
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