8.21托福考试综合写作范文分享：生物类

　　8.21托福考试综合写作范文分享：生物类！8月21日的写作部分难度中等。独立部分虽然题目较难，但在去年考试中重复了3次，分别在8月，9月家考托福和12月12日线下托福中考过。

　　综合写作

　　话题分类生物类

　　考题回忆总论点造成sauropod gigantic size的因素

　　阅读部分第一个就是高氧气浓度。第二个是丰富资源。第三个是 warm climate。

　　听力部分1. 那个时候得氧气浓度还没有现在高。

　　2. 资源丰富但是营养质量不行。

　　3. 气候导致体积大的更需要出汗，更需要cool off 比较小体积的动物。

　　解题思路传统四段式写作，每一段阅读内容+听力内容。

　　参考范文The reading passage and the lecture are both talking about the factors leading to the gigantic size of sauropod. The reading passage proposes several possible explanations, while the lecture argues that none of the theories is true.

　　Firstly, the reading argues that high oxygen concentration may lead to the huge size. However, the professor in the listening argues against that at that time, oxygen concentration was not that high, making it impossible to help sauropod grow into huge size.

　　Secondly, the passage claims that abundant resources contribute to the large size of sauropod, which is refuted by the professor who argues that it is true that there were rich resources. However, they were lack of nutrition, weakening the theory proposed by the reading passage.

　　Thirdly, the author of the reading asserts that warm climate cause sauropod to grow into huge size. Nevertheless, the professor in the listening argues that warm climate would cause animals with huge size to sweat, while cool off those with small size.

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