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Watch Later 1:37

Chemistry tutorial-Ch20-11-Water pollution from oil spillage

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Chemistry tutorial-Ch20-10-Global warming

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Chemistry tutorial-Ch20-9-Acid rain

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F4_化學_CH17-1 強酸和弱酸、強鹼和弱鹼的意思

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Chemistry tutorial-Ch20-8-Air pollution

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化學教室-第20章-8-空氣污染

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Chemistry tutorial-Ch20-7-Heat change during of hydrocarbons

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Chemistry tutorial-Ch20-6-Major uses of petroleum fractions

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Chemistry tutorial-Ch20-5-Fractional distillation of petroleum in the school laboratory

YU CHUN KEUNG MEMORIAL COLLEGE