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
2012-07-17
54
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 electric plates on the electric eel______.
选项
A、run along the length of its body
B、are found on sides of its head
C、are located in its head
D、are in its tail
答案
A
解析
本题是一道具体细节题。问电鳗鱼身上的电极板是如何分布的。利用查阅式阅读法,我们可以在文章的第三段中找到相关的内容。这段指出,另外一个广为人知的例子是电鳗,这种鱼的电击强度更大。它的放电系统与水雷鱼不同。在该系统中,电极片遍布全身,极片神经与脊髓相连,这样,电流便不断地流经全身,由头至尾流动。因此,本题的正确答案应是A“遍布全身”。
转载请注明原文地址:https://kaotiyun.com/show/NmXO777K
0
在职攻硕英语联考
相关试题推荐
Hishealthdeterioratedrapidlyduetoinsufficientnutritionand______medicalcare.
Whenaneight-lanesteel-truss-archbridgeacrosstheMississippiRiverinMinneapoliscollapsedduringtheeveningrushhouron
Cultureistransmittedlargelybylanguageandbythenecessityforpeopleinclosecontacttocooperate.Themoreextensivethe
LatelyIgotachancetoreadPeoplemagazine’smostrecentcompilationof"The50MostBeautifulPeopleintheWorld."Itwas
Wewereborntolovingparentswho______theimportanceoffamilybonds,education,hardwork,andcommitmenttoothers.
Agoodeducationisanassetyoucan______fortherestofyourlife.
Ifacompanyisalreadyeffectively______itscompetitorsbecauseitprovidesservicethatavoidsadamagingreputationandkeeps
AsApplepreparestoreportwhat(analystsproject)maybethecompany’sfirstyear-over-yearquarterlyearningsdeclineinade
Aslongasnationscannotthemselvesaccumulateenoughphysicalpowertodominateallothers,theymustdependon______.
Whatwillmanbelikeinthefuture—in5,000oreven50,000yearsfromnow?Wecanonlymakeaguess,ofcourse,butwecan
随机试题
A企业委托某物流公司管理存货。已知A企业每年需要耗用甲材料20000千克,每千克储存成本为1.5元,平均每次订货成本为600元。要求:计算全年总成本。
女性23岁,月经期。诉尿频、尿急、尿痛3天就诊。以往无类似发作史。体检:膀胱区无压痛,双肾区无叩痛。为明确诊断,最有价值的检查项目是
“水气凌心”主要由于
星煌公司是一家上市公司。现董事长吴某就星煌公司向坤诚公司的投资之事准备召开董事会。因公司资金比较紧张,且其中一名董事梁某的妻子又在坤诚公司任副董事长,有部分董事对此投资事宜表示异议。关于本案,下列哪些选项是正确的?(2016年卷三71题,多选)
生产预算是编制全面预算的出发点,也是日常业务预算的基础。()
旅游团抵达郑州后,地陪小李在与领队核对商定日程时,领队提出的要求与原日程不符,并且涉及接待规格,地陪小李应()
批评家在稳定市场秩序、给画家以学术定位中起着重要作用,但他们对于多数在商业上得宠的艺术家却______。由于批评家总是本能地关注那些独辟蹊径和具有艺术史意义的艺术家,因而对于那些迎合公众趣味的商业倾向均不以为然。填入画横线部分最恰当的一项是:
颁布《中华人民共和国教育法》的国家机关是()
2019年国务院政府工作报告首次将()置于宏观政策层面。
以下对IBM-PC系列及其兼容机论述正确的是( )。
最新回复
(
0
)