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托福综合写作范文:海星种群数量为何下降

2017-02-21 17:20:00来源：网络

　　本文托福综合写作题目为海星种群数量为何下降（2016年10月15日托福考试写作），为了帮助大家高效备考托福，熟悉托福综合写作范文，新东方在线托福网为大家带来托福综合写作范文:海星种群数量为何下降一文，希望对大家托福备考有所帮助。更多精彩尽请关注新东方在线托福网!

托福综合写作Topic 议题：why sea star population declines

ReadingListening
Thesis 总论点The reading points out three reasons to explain why sea star population declines.Refute the three explanations mentioned in reading passage.
Sub-point 1
分论点1		The parasite attachés itself to sea star, and thus affects star’s health.This parasite only affects star’s reproductive organ and thus only affects star in its reproductive season. But disease appears during the whole season.
Sub-point2
分论点2		The bacteria in the shellfish, which is the food of sea star, cause sea star decline.For most sea stars, they can tolerate bacteria, so this bacterium is harmless to sea star. Therefore, there must be another reason to cause sea star decline.
Sub-point 3
分论点3		Water temperature rising weakens the sea star’s immune system.Research found the water temperature in area where the disease outbreaks is quite moderate. Besides, the disease outbreaks in the area where the water wave is much calmer than other areas; the reason is still in the mysterious.

　　托福综合写作范文Sample answer:

　　The reading and listening discuss why sea star population declines. The reading points out three reasons to explain why sea star population declines. Whereas, the professor totally refutes the three points presented in the passage.

　　Firstly, the professor rebuts the reading’s first point that the parasite attachés itself to sea star, and thus affects star’s health. He points out that this parasite only affects star’s reproductive organ and thus only affects star in its reproductive season. But disease appears during the whole season.

　　According to the reading material, the bacteria in the shellfish, which is the food of sea star, cause sea star decline. The professor mentions that for most sea stars, they can tolerate bacteria, so this bacterium is harmless to sea star. Therefore, there must be another reason to cause sea star decline.

　　At last, reading material points out that water temperature rising weakens the sea star’s immune system. However, the professor explains that the water temperature in area where the disease outbreaks is quite moderate. Besides, the disease outbreaks in the area, where the water wave is much calmer than other areas; the reason is still in mystery.

　　以上就是新东方在线托福网为你带来的托福综合写作范文:海星种群数量为何下降，更多精彩敬请关注新东方在线托福网。

本文关键字: 托福综合写作 托福综合写作范文

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