托福听力2015年6月27日听力大范围预测-讲座（理化人文类）讲座：化学(5)1. chemistry，水沸腾过程中，100-220度之间一种奇观的现象。2. Talks about the how the organic substance originates from the earth. Mentioned Millers experiment: he used 4 gases which are inorganic and were supposed to be the primitive substance on earth. In this experiment the electricity is a necessity to create organic compounds. (question: whats the weakness of this experiment? What is the significance of this experiment? )3. C原子
