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By: t0605, Views: 1817

Chemistry tutorial-Ch25-3-Polarity of molecule

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Chemistry tutorial-Ch25-4-Predicting the polarity of a molecule

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Chemistry tutorial-Ch25-5-Effect of charged rod on polar and non-polar liquids

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By: t1402, Views: 955

中一默書

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By: t1602, Views: 891

Dictation 1

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Dictation 1

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Dictation 2

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By: t1110, Views: 1315

F. 1 Chapter 8

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By: t9901, Views: 1106

Some spelling errors found in students' writing

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