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
2015-12-31
51
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.
The most powerful electric fish produces enough electricity to______.
选项
A、light a large electric motor
B、kill a marine animal
C、drive a small electric motor
D、kill a large fish
答案
C
解析
本题是一道具体细节题。问鱼放出的最强的电量可以做什么。根据文章第一段内容,谈到一条鱼能放电,而且电的强度足以点亮灯泡,甚至驱动小电机,几乎令人难以置信。但是,有几种鱼确能如此。更加奇怪的是,不同鱼类以不同的方式获得这种奇特的力量。由此我们可以推断本题的正确答案应是C“可以驱动小发动机”。
转载请注明原文地址:https://kaotiyun.com/show/M6PO777K
0
在职攻硕英语联考
相关试题推荐
Thepressure______causesAmericanstobeenergetic,butitalsoputsthemunderaconstantemotionalstrain.
Whenaninventionismade,theinventorhasthreepossiblecoursesofactionopentohim:hecangivetheinventiontotheworld
Thereweremanypeoplepresentandheappearedonlyforafewseconds,soIonlycaughta______ofhim.
Accordingtothepassage,thechiefpurposeofexplorersingoingtounknownplacesinthepastwas______.Atpresent,aprobab
Nowadaysitisnotuncommonforabig,strongschoolboytoelbowanelderlywomanasideinthedashforthelastremainingseat
Theofficedesk,asweknowit,mayhavehaditsday.AlargestudyonthefutureofworkintheUKpredictstheriseofthe"mo
Languagelearningbeginswithlistening.Individualchildrenvarygreatlyintheamountoflisteningtheydobeforetheystarts
Salesperson:WelcometoRedRooster.CanIhelpyou?Customer:______
Mostoftheplansandprogramsfordiminishingcrimebymeansofcomprehensivecommunityorganizationhavemadepreventiontheir
Wearetaughtthatabusinesslettershouldbewritteninaformalstyle______inapersonalone.
随机试题
柏林大学是一所新型大学,注重开展哲学、科学和学术(),提倡学习和教学自由。建立了()教授制度和()制度,培养学生的()能力,从而确立了以()为核心的现代大学
拉伸截面线串必须共面。
正常新生儿脐带脱落的时间,发生于出生后
慢性支气管炎最主要病因是
对于以前审计获取的有关下列控制运行有效性的审计证据,注册会计师在本期审计中可能考虑直接利用的有()。
获得教师资格证是合格教师的标志。()
在预算的实际执行过程及年终的决算中,人们把()视为一种理想的财政平衡的标志。
《后汉书·章帝纪》:“律十二月立春,不以报囚。冬至以后,在顺阳助生之文,而无鞫狱断刑之政。朕咨访儒雅,稽之典籍,以为王者生杀,宜顺时气。”《盐铁论·论菑》:“春夏生长,利以行仁。秋冬杀藏,利以施刑。”请运用中国法制史的知识和理论,分析上
交换机配置时,所输入的配置命令可以使用缩写形式。在Swish模式下,如果输入con,则表示(38)。
AustraliahasjoinedanappealforaidtoSomaliabecause________.
最新回复
(
0
)