A. To explore a possible similarity between manatees and fish
B. To explore recent research on animal hair types and her functions
C. To show how marine mammals have adapted to various ocean environments
D. To present a theory about the various functions of animals' lateral lines
我的笔记 编辑笔记
答案:A
题型:主旨题
音频定位:
This sensitivity to water pressure allows the fish to detect changes in currents, which helps them to navigate, to make their way through the environment and I bring this up because you need to understand it for today's discussion, which is actually about how the manatee navigates.
解析:文章的 introduction 背景介绍部分讲鱼类会用 lateral line 导航,和后面主体讲的 manatee 导航的方式类似,都是通过触觉来导航,这就是一种 manatee 和鱼类的 similarity,所以 A 选项所说的 a possible similarity between manatees and fish 虽然看起来很笼统,但在这个 lecture 的语境下,就是指 manatee和鱼都通过触觉导航,故 A 对。
B 说的关于 hair types and her functions 的 research,可以留意下此处是复数,即多个种类和多种不同的功能,这篇文章并不是讲关于 hairs 多种类型和功能的研究(如某种 hair 可以御寒维持体温,某种 hair 可以有利于新陈代谢),本文只讲了一种 function,即导航,而且本文最后才是 research,前面是想法,最后才提到一个 research 证明了是对的,凭这点也知道 B 不选。
C 在全文无体现。
D 的 lateral line 是关于鱼类的,不是关于这篇文章的主角-manatee的,错。
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