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Watch Later 4:24

化學教室-第20章-9-酸雨

Watch Later 4:28

Chemistry tutorial-Ch20-12-Reducing the emission of air pollutants from combustion of fossil fuels

Watch Later 1:37

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

Watch Later 1:55

Chemistry tutorial-Ch20-10-Global warming

Watch Later 4:18

Chemistry tutorial-Ch20-9-Acid rain

Watch Later 10:10

F4_化學_CH17-1 強酸和弱酸、強鹼和弱鹼的意思

Watch Later 8:31

Chemistry tutorial-Ch20-8-Air pollution

Watch Later 8:18

化學教室-第20章-8-空氣污染

Watch Later 5:29

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

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