Question 10 is based on the passage you have just heard.

Passage One

听力原文

       The saying “blind is a bat”, simply isn’t correct. The truth is that all 1,100 bat species can see and often their vision is pretty good, although not as excellent as other night-hunting animals.

       There are two main groups of bats which are believed to have evolved independently of each other, but both from a common ancestor. The first group, known as megabats, are mostly medium-sized or large bats who eat fruits, flowers and sometimes small animals or fish. (9) [These species have distinctive visual centers and big eyes.] They use senses of vision and smell to capture their prey. For example, flying foxes not only see well during daylight, but can also distinguish colors. They actually rely on their daylight vision, and cannot fly during the night with no moonlight. The second group called microbats, are smaller in size and mostly eat insects. (10) [These species use echolocation to find their way and identify food.] Scientists have proven that despite their poorly developed small eyes, these bats still can see during the day. When we consider the nightly lifestyle of these bats, we will see they have to be sensitive to the changing light levels, because this is how they sense when to start hunting. Moreover, vision is used by microbats to travel over long distances, beyond the range of echolocation.

       So, the truth is, there are no bats which are naturally blind. (11) [Some species use their sense of hearing more than their eyes as a matter of adaptation to a particular lifestyle,] but their eyes are still functional.

10. How do microbats find their way and identify food?（微蝙蝠是如何找到它们的路并识别食物的？）

解析：B。录音中提到，第二类是微蝙蝠，它们利用回声定位（echolocation）来找到方向并识别食物。B项的echolocation原词复现，因此选B。

错项排除：A、C、D三项分别利用录音中的moonlight、daylight vision和vision and smell进行干扰，但这些内容在录音中说的都是巨蝙蝠，并不是说微蝙蝠，故A、C、D三项均可排除。