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TPO28-3的修辞目的题，一起来看看吧。
TPO28-3 Buck Rubs and Buck Scrapes
Paragraph 4: Forehead rubbing by male deer on buck rubs presumably sends a great deal of information to other members of the same species. First, the chemicals deposited on the rub provide information on the individual identity of an animal; no two mammals produce the same scent. For instance, as we all know, dogs recognize each other via smell. Second, because only male deer rub, the buck rub and its associated chemicals indicate the sex of the deer producing the rub. Third, older, more dominant bucks produce more buck rubs and probably deposit more glandular secretions on a given rub. Thus the presence of many well-marked rubs is indicative of older, higher-status males being in the general vicinity rather than simply being a crude measure of relative deer abundance in a given area. The information conveyed by the olfactory signals on a buck rub make it the social equivalent of some auditory signals in other deer species, such as trumpeting by bull elk.
5.Why does the author mention that “dogs recognize each other via smell”?
O To point out the similarities between dogs and deer
O To argue that animals communicate through scent rather than through vision
O To support the claim that the scent of a buck rub serves to identify its maker to other deer
O To suggest that buck rubs can be detected by other species
解析：这句话是由for instance引出的。那么如果要找这个例子的目的，要到前面去找论点。这一段的总论点，就是第一句话，主要是“send information to other members”;first后面是第一个分论点。所以答案应该跟这两句有关。因此选C气味可以帮助identify。
[4] 雄鹿前额在擦痕上的摩擦很可能向同类中的其它成员发出了大量信息。首先擦痕上残留的化学物质提供了一只动物的个体信息。没有两只气味相同的哺乳动物。就如我们熟知的那样，狗就是通过气味区别彼此的。第二，因为只有雄鹿制造擦痕，所以擦痕及其携带的化学物质表示了制造擦痕的鹿的性别信息。第三，年龄更大、更具统治地位的雄鹿制造的擦痕更多，而且其分泌在擦痕上的气味分泌物很可能也更多。因此大量的标记得很好的擦痕的出现表明年龄较大、地位较高的雄鹿就在附近，而不仅只是粗略的说明了该区域鹿群的相对丰度。雄鹿擦痕上的气味记号所携带的信息使它成为与其它种类鹿群中的某些声音信号，比如雄性麋鹿的叫声，同等重要。
以上就是托福阅读TPO28-3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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