首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
The idea of a fish being able to generate electricity strong enough to light lamp bulbs—or even to run a small electric motor—is
The idea of a fish being able to generate electricity strong enough to light lamp bulbs—or even to run a small electric motor—is
admin
2014-04-23
49
问题
The idea of a fish being able to generate electricity strong enough to light lamp bulbs—or even to run a small electric motor—is almost unbelievable, but several kinds of fish are able to do this. Even more strangely, this curious power has been acquired in different ways by fish belonging to very different families.
Perhaps the best known are the electric rays (鳐鱼),or torpedoes (水雷鱼),of which several kinds live in warm seas. They possess on each side of the head, behind the eyes, a large organ consisting of a number of cells which contain a series of flat electric plates. One side, the negative side, of each plate, is supplied with very fine nerves, connected with a main nerve coming from a special part of the brain. Current passes from the upper, positive side of the organ downwards to the negative, lower side. Generally it is necessary to touch the fish in two places, completing the circuit, in order to receive a shock.
Another famous example is the electric eel (鳗鱼).This fish gives an even more powerful shock. The system is different from that of the torpedo in that the electric plates run along the length of its body and are supplied with nerves from the spinal cord (脊髓). Consequently, the current passes along the fish from head to tail. The electric organs of these fish are really altered muscles and like all muscles, they tend to tire easily, so they are not able to produce electricity for very long.
The power of producing electricity may serve these fish both for defense and attack. If a large enemy attacks, the shock will drive it away; but it appears that the electric eel uses its current most often against smaller fish.
Usually you will not get a shock until you touch______.
选项
A、a torpedo in one place
B、the water nearby it
C、its main nerve connected with fine nerves
D、a torpedo in two places
答案
D
解析
本题是一道根据文章所提示的具体细节进行推断的题目。问通常你只有在什么情况下才会受到电鳐鱼的电击。根据文章第二段关于电鳐鱼放电的原理部分,在电鳐鱼的头上每一侧眼睛的后面均有一个很大的、由几个小腔组成的器官,内含一组电极片。各电极片的一面,即负极面,具有十分敏感的神经,这些神经与通往大脑一个特殊部分的主神经相连。电流通过器官上面,即正极面向器官下面的负极面流动。一般说来,需要触摸到鱼身体的两个部位才能形成电流回路,受到电击。因此,本题的正确答案应是D“只有摸到电鳐鱼身体的两个部位才会受到电击”。
转载请注明原文地址:https://kaotiyun.com/show/m1WO777K
0
在职攻硕英语联考
相关试题推荐
Don’tcallhimjustacollegeprofessor.Internetentrepreneur,TVpersonality,advisortopresidents,andfriendtotherichan
Opinionpollsarenowbeginningtoshowthatwhoeveristoblameandwhateverhappensfromnowon,highunemploymentisprobably
Foranyonewhohasexperiencedanearthquake,theexperiencecanbefrighteningandtraumatic.Inadditionofthemovementofth
PresidentCoolidge’sstatement,“ThebusinessofAmericaisbusiness,”stillpointstoanimportanttruthtodaythatbusinessin
Justoveradecadeintothe21stcentury,women’sprogresscanbecelebratedacrossarangeoffields.Theyholdthehighestpol
ThereisnogreaterpowerintheworldtodaythanthatwieldedbythemanipulatorsofpublicopinioninAmerica.【T1】Nokingor
MykidstellmethatIam"so20thcentury",whichtroublesme.Apersonlikestofeelthatheis"withit",asweusedtosayi
Wewouldn’thaveimaginedit?Afteryearsontop,Nikesuddenlylookslikeaworld-classmarathonerwho,inmid-race,questions
Whenimaginativementurntheireyestowardsspaceandwonderwhetherlifeexistsinanypartofit,theymaycheerthemselvesb
Whenimaginativementurntheireyestowardsspaceandwonderwhetherlifeexistsinanypartofit,theymaycheerthemselvesb
随机试题
行政机关违法实施行政许可,给当事人的合法权益造成损害的,赔偿的法律依据是()。
下列对意识障碍的描述,正确的是
"脉痹不已,复感于邪,内舍于心"引起的心悸病机当为
治疗暴喑,舌强不语,常用循治疗咳嗽、气喘、头痛、项强、热病,常用
不能作为设备更新估算依据的是设备的()。
信托公司的信誉度是决定信托产品风险的重要因素。()
某企业2016年度实现利润总额1350万元,适用的所得税税率为25%。本年度该企业取得国债利息收入150万元,发生税收滞纳金4万元。不考虑其他因素,该企业2016年度利润表“所得税费用”项目本期余额为()万元。
德育过程的基本要素包括()。
根据我国《宪法》的规定,处理全国人大常委会的重要日常工作的机关是()。
A、 B、 C、 D、 C数据的独立性是数据库领域的一个常用的术语,包括数据的物理独立性和数据的逻辑独立性。①数据的物理独立性是指用户的应用程序与存储在磁盘上的数据库中的数据是相互独立的,也就是说,当数据的物
最新回复
(
0
)