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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

Watch Later 1:53

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

Watch Later 4:54

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

Watch Later 5:33

化學教室-第20章-7-燃燒烴的熱變化

Watch Later 1:55

化學教室-第20章-6-各石油餾分的主要用途

Watch Later 5:16

化學教室-第20章-5-在學校實驗室進行石油提煉

Watch Later 2:21

化學教室-第11章-5-金屬與稀氫氯酸和稀硫酸的反應

Watch Later 2:09

F4_化學_16-4量度溶液的pH值

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