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[Cara. Zhong老师已改] 托福写作——[综合+独立][TPO 9]求批改~

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发表于 2018-4-17 07:19 |显示全部楼层
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Question:Question: Summarise the points made in the lecture, being sure to explain how they cast doubt on specific points made in the reading passage.  Although the lecturer admits that the use of oil power is not long-lasting and may be harmful to environment, she insists that the use of hydrogen could not be a solution to the problem internal-combustion engines have caused.
  First of all, the presenter throws doubts on the availability of hydrogen praised in the reading passage by stating that it can only be utilized through purification, which requires very cool laboratory conditions, making it not so practical now.
  Further, the lecturer makes the point in the reading passage that hydrogen-based fuel cells will help solve the world\\\'s pollution problems seem spurious by revealing the fact that to produce hydrogen, there has to be burning of oil as well as coal during the process of purification, which will cause pollution rather than reducing it.
  Last, the lecturer makes the economically competitive advantage of hydrogen listed in the reading passage inaccurate by contending that it is actually expensive to manufacture a fuel-cell automobile. Plus, without enough efforts on control of the chemical process, it won\\\'t be successful to produce the engines, either.
  On the base of information from three specific aspects above, the professor concludes that it\\\'s not practical now to say that internal-combustion engines will soon be replaced by hydrogen-based fuel-cell ones.


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发表于 2018-4-20 11:55 |显示全部楼层
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发表于 2018-4-20 13:10 |显示全部楼层
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