单选题  
单选题    
 
【正确答案】 C
【答案解析】[听力原文] We're going to go on a dive to the deep sea, and anyone that's had that lovely opportunity knows that for about two and half hours on the way down, it's a perfectly positively black world. And we used to see the most mysterious animals out the window that you couldn't describe: these blinking lights—a world of lighting animals, like fireflies. Dr. Edith Widder—she's now at the Ocean Research and Conservation Association—was able to come up with a camera that could capture some of these incredible animals. That's the light produced by animals. So, like I said: just like fireflies. There's a flying turkey under a tree. I'm a geologist by training. But I love that. And you see, some of the light they use to avoid being eaten, some they use to attract prey, but all of it, from an artistic point of view, is positively amazing. And a lot of what goes on inside. There's a fish with glowing eyes. Just absolutely amazing. That's the unknown world, and today we've only explored about 3 percent of what's out there in the ocean. Already we've found the world's highest mountains, the world's deepest valleys, underwater lakes, and underwater waterfalls—a lot of that we shared with you from the stage. And in a place where we thought no life at all, we find more life, we think, and diversity and density than the tropical rainforest, which tells us that we don't know much about this planet at all. There's still 97 percent, and either that 97 percent is empty or just full of surprises. But I want to jump up to shallow water now and look at some creatures that are positively amazing. This is an octopus—this is the work of Dr. Roger Hanlon at the Marine Biological Lab—and it's just fascinating how head-foot animals can, with their incredible eyes, sense their surroundings, look at light, look at patterns. Here's an octopus moving across the reef, finds a spot to settle down, curls up and then disappears into the background. What can we find in the deep sea according to the speaker? 录音开头演讲者提到深海中虽一片漆黑,我们却可能在那里找到最神秘的动物——大量会发光的动物,C为录音原词复现,为正确答案。 A容易误选,虽然录音开头提到了深海一片漆黑,但紧接着讲到那里有神秘的会发光的动物,而非只有一片漆黑,故排除A。演讲者提到深海有像萤火虫一样会发光的动物,而不是说深海有萤火虫,故B错误。录音并未提及深海中有古代船只的残骸,故排除D。
单选题    
 
【正确答案】 A
【答案解析】[听力原文] What is the function of the light produced by animals in the deep sea? ①选项都是不定式短语,推测本题可能问目的、用途或打算。②录音提到有些动物发出的光是用来避免被其他动物吃掉,而有些则用来吸引猎物,A是这两点的同义概述,故为正确答案。 动物发光看起来很美,但不能说它们发光是为了要照亮和美化深海,故排除B。C“用以在黑暗中找路”和D“用以吸引伴侣和警示敌人”录音中均未提及。
单选题    
 
【正确答案】 B
【答案解析】[听力原文] Why does the speaker mention an octopus in the end? ①选项均为不定式短语,推测本题可能问目的、用途或打算。②演讲者介绍完深海发光动物后,以Octopus(章鱼)为例,希望大家知道浅海生物也同样令人惊叹,故B正确。 录音最后演讲者介绍章鱼眼睛的功能等特点是为了突出浅海生物的令人惊叹,而不是单纯为了介绍这种动物的特殊性和功能,故排除A。演讲者描述了章鱼用触足和眼睛来感知环境,但并不能由此得知它们如何适应周围环境,故C错误。演讲者没有号召人们去保护海洋生物,故D排除。