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[ZHY2018老师已批改] 托福写作——[综合+独立][TPO 49]这是我最后一篇写作麻烦您了谢谢

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发表于 2018-7-5 15:53 |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.The article states that humpback whales might use stars to navigate and provides three reasons of support. However, the professor explains that the evidences supporting humpback whales\\\' navigation by stars are not convincing and refutes each of the author\\\'s reasons.

First, the reading states that humpback whales are intelligent and thus they are able to use star navigation. The professor opposes this point by stating intelligence and navigation by stars have no connection. He provides an example of ducks using stars to navigate. Ducks have average cognitive ability yet they could still perform star navigation. Thus, he deduces it is an instinct for animals instead of a real connection with intelligence.

Second, the article claims that humback whales navigate in straight lines. Conversely, the professor contends that the reason they migrate in this way is not because of stars but rather the gravitational field of the Earth. He argues that humpback whales have a physiological component in their body called biomagnitude, which is sensitive to the Earth\\\'s magnetic field. Therefore, humpback whales are likely to orient themselves by the magnetic field of the Earth instead of the stars.

Third, the author avers that the function of spy-hopping, which humpback whales do, is to look at the stars in order to navigate. However, the lecture refutes this point by suggesting an example of sharks. Sharks do not migrate but they also perform spy-hopping. The reason they do that is to search for food to eat. What\\\'s more, they spy-hop during daytime instead of night time, which is impossible for them to look at the stars. Thus, the professor casts doubts on the validity of the relationship between spy-hopping and looking at the stars.


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