托福阅读修辞目的题是阅读考试中比较常见的一种题型，tpo则是托福阅读备考最权威的材料 ，所以托福小编综合二者，为大家集中整理了tpo阅读中考察的修辞目的题及其对应的解析，供大家参考使用。本文带来的是TPO10-3的修辞目的题，一起来看看吧。
TPO10-3 Variations in the Climate
Paragraph 7
In addition to the internal variability of the global climate system itself, there is the added factor of external influences, such as volcanoes and solar activity .There is a growing body of opinion that both these physical variations have a measurable impact on the climate. Thus we need to be able to include these in our deliberations. Some current analyses conclude that volcanoes and solar activity explain quite a considerable amount of the observed variability in the period from the seventeenth to the early twentieth century’s, but that they cannot be invoked to explain the rapid warming in recent decades.
12. What is the author's purpose in presenting the information in paragraph 7?
○ To compare the influence of volcanoes and solar activity on climate variability with the influence of factors external to the global climate system
○ To indicate that there are other types of influences on climate variability in addition to those previously discussed
○ To explain how external influences on climate variability differ from internal influences
○ To argue that the rapid warming of Earth in recent decades cannot be explained
解析：问整段的关注第一句，这句说除了internal之外，还有external，是一个典型的承上启下的句子，启下的才是这段要说的，也就是external的部分，所以答案是B。A和C都说比较，而原文根本没有比较;D错因为原文没有argue。
[7]除全球气候系统本身的内部变化之外，还存在其他外部的影响因素，如火山和太阳活动。有越来越多的观点认为这两种物理变化对气候有着可测量的影响。因此我们需要能够考虑到这些因素。一些现有的分析断定火山和太阳活动解释了自17世纪到20世纪早期的相当多的可观察到的变化，但它们不能用以解释最近几十年的全球气候迅速变暖的现象。
以上就是托福阅读TPO10-3中的修辞目的题及其解析，大家可以在备考的时候参考复习，希望能够帮助大家的考前准备。最后前程百利祝大家都能取得理想的托福考试成绩。
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