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
48
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
OnereasonwhymanyAmericansarestillfascinatedbythefrontieristhat______.Themainideaofthepassageis______.
Themicroscopeopeneduptomananotherstrangenewworld:aworldofthingstoonearandsmallforanyone______thescientist
Theauthorcitestheexampleofthe16-year-oldAlbanianhigh-schooldrop-outtoshowItisdifficulttopreventmigrationofp
WhatismostunusualaboutAmericansociety?TheNationalRifleAssociationwasestablishedto______.
Theproblemisthattheyareunabletocommunicateeffectivelyinthelanguage______publicservicesareoffered.
Inmanystatesthisyear,budgetrequestsbystateuniversitieshavehadtobescaledbackorfrozen,whiletuition,theshareo
Salesperson:WelcometoRedRooster.CanIhelpyou?Customer:______
Itisn’tcoldenoughforthere______afrosttonight,soIcanleaveJim’scaroutquitesafely.
Peoplecanbeaddictedtodifferentthings—e.g.alcohol,drugs,certainfoods,oreventelevision.Peoplewhohavesuchaddit
The______soundofmovementsinthekitchensuggestedthatthechildrenweresecretlyhelpingthemselvestothechocolatecake.
随机试题
宋代文坛并称“苏辛”的是()
一些地方的交警队发文规定,上路行驶的机动车必须到指定的企业安装防雾灯、尾气净化装置。一些车主在其他的地方安装的防雾灯和尾气净化装置虽然质量好、价格低,但交警队不认账,并按未安装有关装置对这些车主予以罚款。请从建设社会主义法治国家的角度,谈谈对交警
用于沟渠、管道施工测量及建筑物变形观测等,较精准的测量仪器有()。
单位工程验收可分为单位工程投入使用验收和单位工程完工验收。单位工程投入使用验收由______主持,单位工程完工验收由______主持。下列选项正确的是()。
软新闻:是指富有人情味、纯知识、纯趣味的新闻。它通常和人们的切身利益无关,只向人们提供娱乐,知识或茶余饭后的谈资,多属于延缓性新闻。根据上述定义,下列不属于软新闻的是()。
-3,-1,3,-3,-9,()
警察的社会管理职能具有鲜明的政治性和强烈的阶级性。()
对下图所示的程序流程图进行语句覆盖测试和路径覆盖测试,至少需要(35)个测试用例。采用McCabe度量法计算其环路复杂度为(36)。(36)
以下声明语句中错误的是()。
Itistruethatthegroupinteractionshavebothpositiveandnegativesides.Whenwe【B1】______,conflictcannotbegottenrido
最新回复
(
0
)