首页
登录
职称英语
[originaltext] This room is devoted to electric fish. The eel in the tank be
[originaltext] This room is devoted to electric fish. The eel in the tank be
游客
2023-08-21
31
管理
问题
This room is devoted to electric fish. The eel in the tank behind me can produce a strong jolt of electricity to stun its prey, but most of the fish in here produce only weak electrical impulses that are useful for navigating. Locating food, and even for communicating.
The knife fish is good example. This fish navigates using tiny receptors in the skin that are sensitive to electrical impulses. The knife fish produces an electrical signal, and the receptors in its skin let it know when the signal it distorted by a tree root, or some other obstacle, so it can go around it.
Fish also use the ability to produce and detect electrical impulses to communicate. They can tell each other what species they belong to, how big they are, and whether they’re male or female. We have a tank here that’s specially equipped to convert the inaudible signals the ish produce into sounds you can hear when you put on these headphones. I urge you all to listen in when I’m done speaking.
Now have a look at the electric rays. Rays are especially interesting to medical researchers because of the organs they use to produce electricity. These organs contain a chemical that carries signals from one nerve ending to the next, not only in rays, but also in people. By studying these organs, scientists hope to learn more about diseases that interrupt the transmission of impulses from one nerve to another.
5. What is the talk mainly about?
6. What does the knife fish use electricity for?
7. Why does the speaker suggest putting on headphones?
8. According to the speaker, what medical benefits might from studying electric rays?
选项
A、To hear a translation of her talk.
B、To hear signals produced by electric fish.
C、To hear sounds used to train electric fish.
D、To hear a tape about electric fish.
答案
B
解析
说话者建议大家戴上耳机是因为这里有一个特殊的仪器,可以把鱼通过电脉冲进行的听不见的交谈转化为声音,因此选B。
转载请注明原文地址:https://tihaiku.com/zcyy/2944519.html
相关试题推荐
[originaltext]W:Hi,John.Howarethingsgoing?M:Oh,hi.Fine.Howaboutyo
[originaltext]W:Willyoutakethesebookstothelibraryduringyourlunchhou
[originaltext]W:Willyoutakethesebookstothelibraryduringyourlunchhou
[originaltext]W:Willyoutakethesebookstothelibraryduringyourlunchhou
[originaltext]W:Willyoutakethesebookstothelibraryduringyourlunchhou
[originaltext]W:Willyoutakethesebookstothelibraryduringyourlunchhou
[originaltext]OneofNewYork’smostbeautifulandvaluablebuildingsisin
[originaltext]Theneedforbirthcontrolmethodshasdevelopedfairlyrecen
[originaltext]Ababyspendsthefirstyearoflifelearningtolisten.Ane
[originaltext]W:Whatarethosebooksinyourhand?M:Nothingparticular.Just
随机试题
[originaltext]M:Weren’ttheresupposedtobeabout40peopleenrolledinthec
AblondeladywalksintoaNewYorkCityBankandasksforthe【B1】_____offi
7个月男婴,发热咳嗽5天,近2天来呕吐,每天4次,今天突然抽搐3次,曾注青霉素3
一位诊断为慢性牙周炎的牙周病病人,已于2个月前完成基础治疗,现需选择最佳手术方法
A.麻黄B.罂粟壳C.生千金子D.三棱E.芫花属于第二类毒性药材的是
以下哪项关于单克隆抗体的叙述是错误的()。A.由单个B细胞克隆产生 B.
变压器中性点应有()与主地网不同干线连接的接地引下线。一根$;$两根$;$多
渠道权力的来源主要有()。A.奖励权 B.强迫权 C.法定权 D.信息权
女性,30岁,发作性气喘20年,闻花粉后常出现眼痒、流泪和频发喷嚏,现发作4小时
孕妇尿妊娠试验,开始出现阳性反应,最早是在受精后的A、5天 B、6天 C、7
最新回复
(
0
)